KR20100059005A - A digitalized receiver using a voltage controlled oscillator based analog-to-digital converter - Google Patents

Abstract

PURPOSE: A digitalized receiver using a voltage controlled oscillator based analog-to-digital converter is provided to allow the digitalized receiver to be programmed by simultaneously processing a down conversion process and an analog-digital conversion process. CONSTITUTION: The digitized receiver(600) of a first structure comprises a low noise amplifier(610), a voltage controlled oscillator based analog-digital converter(620) and a digital signal processing unit(630). The low noise amplifier reduces noises from analog data signal including the noise and data. The low noise amplifier provides the amplified analog data signal. The voltage controlled oscillator based analog-digital converter provides digital output signal by converting the amplified analog data signal to digital signal. The digital signal processing unit processes the digital output signal.

Description

Digitized receiver using a voltage-controlled oscillator element analog-to-digital converter {A DIGITALIZED RECEIVER USING A VOLTAGE CONTROLLED OSCILLATOR BASED ANALOG-TO-DIGITAL CONVERTER}

The present invention relates to a digitized receiver, and more particularly, to a digitized and programmable receiver using an analog-to-digital converter (VCO-based ADC) based on a voltage controlled oscillator (VCO).

Recently, there has been a trend to make the analog and digital stages of the receiver into one chip, that is, a digital process, which makes digitalization of the receiver an important issue. In addition, the digitization of the receiver is becoming more important because the programmability of the receiver is required to process the rapidly increasing communication standards with a single receiver.

Following this flow, techniques are known for implementing down conversion, decimation and filtering of received signals using sample and hold circuits, switches, and capacitors. It is not possible to digitize the receiver because it only replaces conventional continuous-time analog signal processing with discrete time analog signal processing.

Through the modification of the receiver structure, down-converting the desired frequency band to DC using a mixer and down-converting the desired channel to DC with an integrated sampler, and then programmable decimation using a switch and a capacitor. Although a technique for implementing the filtering and filtering has been introduced, the receiver is not completely programmable in that it is still not digital filtering.

As described above, the conventional receiver performs down-conversion using a mixer for continuous time signal processing, and then performs analog-to-digital conversion through a channel selection filter, and in case of discrete time signal processing, down-converts through a sampler. After filtering, analog-to-digital conversion was performed. Therefore, there are many operations to be performed in the analog stage before the analog-to-digital converter, which makes it difficult to digitize and program the receiver.

Accordingly, an object of the present invention is to provide a voltage controlled oscillator for implementing a digitized receiver.

It is an object of the present invention to provide a voltage controlled oscillator element analog-to-digital converter having a function of correcting nonlinearity of a voltage controlled oscillator.

One object of the present invention is to provide a digitized receiver using a voltage-controlled oscillator element analog-to-digital converter.

In order to achieve the above object of the present invention, a switched voltage controlled oscillator according to an embodiment of the present invention is a voltage controlled oscillator for outputting an oscillation frequency according to an applied voltage, the voltage controlled oscillator is an analog data signal The analog data signal is connected to the input terminal of the voltage controlled oscillator during the first period of integrating the signal, and the DC voltage is input to the input terminal of the voltage controlled oscillator during the second period when the voltage controlled oscillator does not integrate the analog data signal. And a switch to connect to.

In order to achieve the above object of the present invention, a switched voltage controlled oscillator according to an embodiment of the present invention is a voltage controlled oscillator for outputting an oscillation frequency according to the applied voltage, the voltage controlled oscillator integrates an analog data signal The voltage controlled oscillator is operated by connecting a power supply voltage to the voltage controlled oscillator during a first section, and the power supply voltage is cut off during a second section in which the voltage controlled oscillator does not integrate the analog data signal. And a switch to disable the controlled oscillator.

In order to achieve the above object of the present invention, a voltage controlled oscillator device analog-to-digital converter having a nonlinearity correction function of a voltage controlled oscillator according to an embodiment of the present invention is a first voltage controlled oscillator device analog-to-digital converter, The second voltage controlled oscillator device includes an analog-to-digital converter, a moving average filter (MAF), and a mapping table. The first voltage-controlled oscillator initial analog-to-digital converter provides a first output signal in response to an analog data signal, and the second voltage-controlled oscillator initial analog-to-digital converter comprises: With the same configuration, the second output signal is provided in response to a ramp signal, and the moving average filter provides the nonlinear characteristics of the second analog-to-digital converter of the second voltage controlled oscillator in response to the second output signal. The mapping table stores the nonlinear characteristic and corrects the first output signal according to the nonlinear characteristic in response to the first output signal to provide a third output signal.

The voltage-controlled oscillator unit included in the first analog-to-digital converter, the voltage-controlled oscillator outputting an oscillation frequency according to an applied voltage, and the voltage-controlled oscillator integrates the analog data signal. The analog data signal is connected to the input terminal of the voltage controlled oscillator for one section, and the DC voltage is connected to the input terminal of the voltage controlled oscillator during a second section in which the voltage controlled oscillator does not integrate the analog data signal. A switched voltage controlled oscillator including a switch, wherein the voltage controlled oscillator portion included in the second analog-to-digital converter of the second voltage controlled oscillator has the same configuration as that of the voltage controlled oscillator portion included in the first analog-to-digital converter of the first voltage controlled oscillator. Can have

The voltage-controlled oscillator unit included in the first analog-to-digital converter, the voltage-controlled oscillator outputting an oscillation frequency according to an applied voltage, and the voltage-controlled oscillator integrates the analog data signal. The voltage controlled oscillator is operated by connecting a power supply voltage to the voltage controlled oscillator during one section, and the voltage controlled by blocking the power supply voltage during a second section in which the voltage controlled oscillator does not integrate the analog data signal. A switched voltage controlled oscillator including a switch for disabling an oscillator, wherein the voltage controlled oscillator unit included in the second analog-to-digital converter of the second voltage-controlled oscillator is a voltage control included in the first analog-to-digital converter of the first voltage-controlled oscillator. It may have the same configuration as the oscillator portion.

In order to achieve the above object of the present invention, the voltage-controlled oscillator element analog-to-digital converter having a non-linearity correction function of the voltage-controlled oscillator according to an embodiment of the present invention, the internal analog-to-digital oscillator element analog-to-digital converter, Include average filter and mapping table. The internal voltage controlled oscillator initial analog-to-digital converter provides a digital output signal by converting an analog signal into a digital signal in response to a ramp signal before the analog-to-digital conversion starts and in response to an analog data signal after the analog-to-digital conversion starts. And the moving average filter is the internal voltage controlled oscillator device in response to the second output signal of the analog-to-digital converter when the internal voltage controlled oscillator device analog-to-digital converter responds to the ramp signal. Provide the non-linear characteristics of the analog-to-digital converter, the mapping table stores the non-linear characteristics, and the internal voltage-controlled oscillator initial analog- when the internal voltage-controlled oscillator initial analog-to-digital converter responds to the analog data signal. Digital conversion And by a first response to the output signal correcting the first output signal according to the non-linear characteristics and provides a third output signal.

The voltage controlled oscillator unit included in the internal analog-to-digital converter of the internal voltage controlled oscillator may include a voltage controlled oscillator outputting an oscillation frequency according to an applied voltage, and a first section in which the voltage controlled oscillator integrates an analog data signal. Is a switched voltage controlled oscillator which is connected to said analog data signal and which comprises a switch connected to a DC voltage during a second period during which said voltage controlled oscillator does not integrate said analog data signal. The digital converter may further include an offset correction unit configured to correct the offset of the third output signal through an output signal of the voltage-controlled oscillator initial analog-to-digital converter when the digital converter responds to the DC voltage to provide a fourth output signal. .

The voltage controlled oscillator unit included in the internal voltage controlled oscillator device analog-to-digital converter may include a voltage controlled oscillator outputting an oscillation frequency according to an applied voltage, and a first voltage integrated oscillator integrating the analog data signal. The voltage controlled oscillator is connected to the voltage controlled oscillator to operate the voltage controlled oscillator during a period, and the power controlled voltage is cut off during the second period in which the voltage controlled oscillator does not integrate the analog data signal. It may be a switched voltage controlled oscillator comprising a switch to make the operation.

In order to achieve the above object of the present invention, the digitized receiver according to an embodiment of the present invention is amplified analog data by amplifying the data while reducing the noise in the input analog data signal including noise and data A low noise amplifier (LNA) for providing a signal, a voltage controlled oscillator for outputting an oscillation frequency according to an applied voltage, and the amplified signal during a first period in which the voltage controlled oscillator integrates the amplified analog data signal A switched voltage having a switch connecting an analog data signal to an input of the voltage controlled oscillator and a DC voltage to an input of the voltage controlled oscillator during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. A control oscillator is provided, and the amplified analog data Voltage controlled oscillator device for converting a signal into a digital signal to provide a digital output signal, and an analog-to-digital converter and a digital signal processor (DSP) for processing the digital output signal.

In an embodiment, the voltage-controlled oscillator initial analog-to-digital converter is a voltage-controlled oscillator for outputting an oscillation frequency in accordance with the applied voltage and the amplification during the first period in which the voltage-controlled oscillator integrates the amplified analog data signal. A connected analog data signal to an input of the voltage controlled oscillator and a DC voltage connected to an input of the voltage controlled oscillator during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. A first voltage controlled oscillator having a switched voltage controlled oscillator and providing a first output signal in response to the amplified analog data signal, the same configuration as the first analog-to-digital converter of the first voltage controlled oscillator; Second in response to a linear ramp signal A second voltage controlled oscillator device analog-to-digital converter for providing an output signal, a moving average filter for providing a nonlinear characteristic of the second analog signal converter for the second voltage control oscillator device in response to the second output signal, and storing the nonlinear characteristic And a non-linearity correction function of a voltage controlled oscillator including a mapping table for correcting the first output signal according to the nonlinear characteristic and providing a third output signal in response to the first output signal. It may be a digital converter.

In an embodiment, the voltage-controlled oscillator initial analog-to-digital converter is a voltage-controlled oscillator for outputting an oscillation frequency in accordance with the applied voltage and the amplification during the first period in which the voltage-controlled oscillator integrates the amplified analog data signal. A switched voltage controlled oscillator having a switch connected to the analog data signal and connected to a DC voltage during a second period during which the voltage controlled oscillator does not integrate the amplified analog data signal, and prior to the start of the analog-to-digital conversion. Internal voltage-controlled oscillation device, first analog-to-digital converter, in response to a ramp signal and after the start of analog-to-digital conversion, converting an analog signal into a digital signal to provide a digital output signal in response to a signal provided by the switch. Controlled Oscillation Device A moving average filter providing the nonlinear characteristics of the internal voltage controlled oscillator initial analog-digital converter in response to a second output signal of the internal voltage controlled oscillator initial analog-digital converter when the converter responds to the ramp signal, the nonlinear Store the characteristic and according to the non-linear characteristic in response to the first output signal of the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the amplified analog data signal. A mapping table for correcting the first output signal to provide a third output signal and an output signal of the internal voltage controlled oscillator initial analog-digital converter when the internal voltage controlled oscillator initial analog-digital converter responds to the DC voltage. Correcting the offset of the third output signal through Than the fourth voltage control has a nonlinear compensation of the voltage-controlled oscillator comprising an output signal offset compensation unit for providing an oscillator based analog-to-digital converter may be.

In an embodiment, the voltage-controlled oscillator element analog-to-digital converter may adjust the sampling frequency and the length of the integral section integrating the analog output signal of the low noise amplifier.

In order to achieve the above object of the present invention, the digitized receiver according to an embodiment of the present invention is amplified analog data by amplifying the data while reducing the noise in the input analog data signal including noise and data A low noise amplifier providing a signal, a voltage controlled oscillator outputting an oscillation frequency in accordance with an applied voltage, and a power supply voltage connected to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. Switched voltage control having a switch to cause the voltage controlled oscillator to operate and to shut off the power supply voltage during a second period during which the voltage controlled oscillator does not integrate the amplified analog data signal. An oscillator, and the amplified analog data Converting the call into a digital signal by the voltage-controlled oscillator based analog to provide a digital output signal and a digital signal processing apparatus for processing digital converter and the digital output signal.

In an embodiment, the voltage-controlled oscillator initial analog-to-digital converter may include a voltage-controlled oscillator for outputting an oscillation frequency according to an applied voltage, and a power supply voltage during a first period in which the voltage-controlled oscillator integrates the amplified analog data signal. Is connected to the voltage controlled oscillator to operate the voltage controlled oscillator, and the power supply voltage is cut off during the second period in which the voltage controlled oscillator does not integrate the amplified analog data signal so that the voltage controlled oscillator does not operate. A first voltage controlled oscillator having a switched voltage controlled oscillator having a switch to provide a first output signal in response to the amplified analog data signal, the first analog to digital converter, the first voltage controlled oscillator first analog to digital converter Has the same configuration as the linear ramp signal A second voltage controlled oscillator device analog-to-digital converter that provides a second output signal in response; a moving average filter that provides nonlinear characteristics of the second analog signal / digital converter that responds to the second output signal; A non-linearity correction function of the voltage controlled oscillator, the mapping table storing a non-linear characteristic and correcting the first output signal according to the nonlinear characteristic in response to the first output signal to provide a third output signal. The voltage controlled oscillation device may be an initial analog-to-digital converter.

In an embodiment, the voltage-controlled oscillator initial analog-to-digital converter may include a voltage-controlled oscillator for outputting an oscillation frequency according to an applied voltage, and a power supply voltage during a first period in which the voltage-controlled oscillator integrates the amplified analog data signal. Is connected to the voltage controlled oscillator to operate the voltage controlled oscillator, and the power supply voltage is cut off during the second period in which the voltage controlled oscillator does not integrate the amplified analog data signal so that the voltage controlled oscillator does not operate. And a switched voltage controlled oscillator having a switch to convert the analog signal into a digital signal in response to the ramp signal before the analog-to-digital conversion starts and in response to the amplified analog data signal after the analog-to-digital conversion starts. Internal to provide output signal An internal voltage control in response to a second output signal of the internal voltage controlled oscillator device analog-to-digital converter when the voltage controlled oscillator device analog-to-digital converter responds to the ramp signal; A moving average filter providing the nonlinear characteristics of the oscillating device-based analog-to-digital converter, and storing the non-linear characteristics, and controlling the internal voltage when the oscillating-device analog-to-digital converter responds to the amplified analog data signal. A voltage having a nonlinearity correction function of a voltage controlled oscillator including a mapping table for correcting the first output signal according to the nonlinear characteristic and providing a third output signal in response to the first output signal of the first analog-to-digital converter. Controlled Oscillator Instruments Analog to Digital Converters .

In an embodiment, the voltage-controlled oscillator element analog-to-digital converter may adjust the sampling frequency and the length of the integral section integrating the analog output signal of the low noise amplifier.

In order to achieve the above object of the present invention, the digitized receiver according to an embodiment of the present invention is amplified analog data by amplifying the data while reducing the noise in the input analog data signal including noise and data A low noise amplifier providing a signal, a voltage controlled oscillator outputting an oscillation frequency in accordance with an applied voltage, and the voltage controlled oscillator during the first period in which the voltage controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch connected to an input terminal of the oscillator and connecting a DC voltage to an input terminal of the voltage controlled oscillator during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. Digital signal to amplified analog data signal An in-phase voltage controlled oscillator for converting a signal into an inphase output signal to provide an in-phase output signal, a voltage-controlled oscillator for outputting an oscillation frequency according to an applied voltage, and the voltage-controlled oscillator to convert the amplified analog data signal. The voltage controlled oscillator connects the amplified analog data signal to the input terminal of the voltage controlled oscillator during the first period of integration and the second voltage during the second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. A switched voltage controlled oscillator having a switch connected to an input terminal of said in-phase voltage controlled oscillator having a sampling clock 90 degrees out of phase with the sampling clock of said in-phase analog-to-digital converter and digitally converting said amplified analog data signal. Convert to signal and quadrature A quadrature voltage controlled oscillator for providing an output signal includes an analog-to-digital converter and a digital signal processing device for processing the in-phase output signal and the quadrature output signal.

In an embodiment, the in-phase voltage controlled oscillator device analog-to-digital converter and quadrature voltage controlled oscillator device analog-to-digital converter may be a voltage controlled oscillator for outputting an oscillation frequency according to an applied voltage and the voltage controlled oscillator is amplified. During the first period of integrating the analog data signal, the amplified analog data signal is connected to the input terminal of the voltage controlled oscillator and the DC voltage is supplied during the second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. A first voltage controlled oscillator element analog-to-digital converter having a switched voltage controlled oscillator having a switch connected to an input terminal of the voltage controlled oscillator, the first voltage controlled oscillator providing a first output signal in response to the amplified analog data signal; Voltage controlled oscillator A second voltage controlled oscillator initial analog-digital converter having the same configuration as the converter and providing a second output signal in response to a linear ramp signal, the second voltage controlled oscillator initial analog-digital in response to the second output signal A moving average filter for providing a non-linear characteristic of a converter, a mapping table for storing the non-linear characteristic, and correcting the first output signal according to the non-linear characteristic in response to the first output signal to provide a third output signal. It may be a voltage controlled oscillator device analog-to-digital converter having a non-linearity correction function of the voltage-controlled oscillator including.

In an embodiment, the in-phase voltage controlled oscillator device analog-to-digital converter and quadrature voltage controlled oscillator device analog-to-digital converter may be a voltage controlled oscillator for outputting an oscillation frequency according to an applied voltage and the voltage controlled oscillator is amplified. A switched voltage having a switch connected to the amplified analog data signal during a first period of integrating an analog data signal and connected to a DC voltage during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal An internal control oscillator, which converts an analog signal into a digital signal and provides a digital output signal in response to a ramp signal before the analog-digital conversion starts and in response to a signal provided by the switch after the analog-digital conversion starts. Voltage controlled oscillator A digital converter, the internal voltage controlled oscillator initial analog-to-internal voltage controlled oscillator initial analog-to-digital converter in response to the second output signal of the internal A moving average filter for providing a nonlinear characteristic of a digital converter, storing the nonlinear characteristic, and wherein the internal voltage controlled oscillator initial analog-digital when the internal voltage controlled oscillator initial analog-to-digital converter responds to the amplified analog data signal A mapping table for correcting the first output signal according to the nonlinear characteristic in response to the first output signal of the converter to provide a third output signal, and the internal voltage controlled oscillator initial analog-to-digital converter responding to the DC voltage The internal voltage controlled oscillation device when the first analog-digital The voltage-controlled oscillator may be an analog-to-digital converter having a non-linearity correction function of a voltage controlled oscillator including an offset corrector configured to correct an offset of the third output signal through an output signal of the full converter to provide a fourth output signal. .

In an embodiment, the in-phase voltage controlled oscillator initial analog-to-digital converter and the quadrature voltage controlled oscillator initial analog-to-digital converter may adjust the sampling frequency and the length of the integration period integrating the analog output signal of the low noise amplifier.

In order to achieve the above object of the present invention, the digitized receiver according to an embodiment of the present invention is amplified analog data by amplifying the data while reducing the noise in the input analog data signal including noise and data A low noise amplifier for providing a signal, a voltage controlled oscillator for outputting an oscillation frequency according to an applied voltage, and a power supply voltage connected to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. A switched voltage controlled oscillator having a switch to cause the voltage controlled oscillator to operate and to cut off the power supply voltage during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal so that the voltage controlled oscillator does not operate. And amplified analog data In-phase voltage-controlled oscillator for converting a call into a digital signal to provide an in-phase output signal First analog-to-digital converter, a voltage-controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage, and the amplified analog data The power supply voltage is coupled to the voltage controlled oscillator during the first period of integrating the signal to operate the voltage controlled oscillator, and the power supply voltage during the second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. And a switched voltage controlled oscillator having a switch for blocking the voltage controlled oscillator from operating, and having a sampling clock that is 90 degrees out of phase with the sampling clock of the in-phase voltage controlled oscillator. Amplified analog data signal into digital signal Ring quadrature voltage-controlled oscillator based analog to provide a quadrature output signal and a digital signal processing apparatus for processing a digital converter and wherein the in-phase output signal and said quadrature output signal.

In an embodiment, the in-phase voltage controlled oscillator device analog-to-digital converter and quadrature voltage controlled oscillator device analog-to-digital converter may be a voltage controlled oscillator for outputting an oscillation frequency according to an applied voltage and the voltage controlled oscillator is amplified. The voltage controlled oscillator is operated by connecting a power supply voltage to the voltage controlled oscillator during the first period of integrating the analog data signal, and the second period during which the voltage controlled oscillator does not integrate the amplified analog data signal. A first voltage controlled oscillator having a switched voltage controlled oscillator having a switch for interrupting a power supply voltage to disable the voltage controlled oscillator and providing a first output signal in response to the amplified analog data signal. Converter, the first voltage controlled oscillator A second voltage controlled oscillator device having the same configuration as the analog-digital converter and providing a second output signal in response to a linear ramp signal; an analog-to-digital converter, the second voltage controlled oscillator device in response to the second output signal A moving average filter for providing a nonlinear characteristic of an analog-to-digital converter and a mapping for storing the nonlinear characteristic and correcting the first output signal according to the nonlinear characteristic in response to the first output signal to provide a third output signal It may be a voltage controlled oscillator device analog-to-digital converter having a nonlinear correction function of a voltage controlled oscillator including a table.

In an embodiment, the in-phase voltage controlled oscillator device analog-to-digital converter and quadrature voltage controlled oscillator device analog-to-digital converter may be a voltage controlled oscillator for outputting an oscillation frequency according to an applied voltage and the voltage controlled oscillator is amplified. The voltage controlled oscillator is operated by connecting a power supply voltage to the voltage controlled oscillator during the first period of integrating the analog data signal, and the second period during which the voltage controlled oscillator does not integrate the amplified analog data signal. And a switched voltage controlled oscillator having a switch for interrupting a power supply voltage so that the voltage controlled oscillator does not operate, and responding to a ramp signal before the start of analog-to-digital conversion and after the start of analog-to-digital conversion In response, analog An internal voltage controlled oscillator initial analog-to-digital converter for converting a call into a digital signal to provide a digital output signal, the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the ramp signal; Store the moving average filter providing the nonlinear characteristics of the internal voltage controlled oscillator ultra-analog-digital converter and the nonlinear characteristics in response to a second output signal of the digital converter; A mapping table for correcting the first output signal according to the nonlinear characteristic in response to a first output signal of the internal voltage-controlled oscillator initial analog-to-digital converter in response to an amplified analog data signal to provide a third output signal Nonlinear of voltage controlled oscillator including A voltage controlled oscillator having a correction function based on analog-to-digital converter may be.

In an embodiment, the in-phase voltage controlled oscillator initial analog-to-digital converter and the quadrature voltage controlled oscillator initial analog-to-digital converter may adjust the sampling frequency and the length of the integration period integrating the analog output signal of the low noise amplifier.

Hereinafter, a voltage controlled oscillator for implementing a digitized receiver according to embodiments of the present invention, a voltage controlled oscillator having a function of correcting nonlinearity of the voltage controlled oscillator, and an analog-to-digital converter Although a digitized receiver using an oscillating device-based analog-to-digital converter is described in detail, the present invention is not limited to the following embodiments, and those skilled in the art do not depart from the spirit of the present invention. The present invention may be embodied in various other forms within the scope.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers are present. It should be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof. Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

On the other hand, when an embodiment is otherwise implemented, a function or operation specified in a specific block may occur out of the order specified in the flowchart. For example, two consecutive blocks may actually be performed substantially simultaneously, and the blocks may be performed upside down depending on the function or operation involved. Like reference numerals in the drawings denote like elements.

1 is a circuit diagram illustrating a switched voltage controlled oscillator of a first structure according to an embodiment of the present invention.

Referring to FIG. 1, the switched voltage controlled oscillator 100 of the first structure includes a voltage controlled oscillator 110 and a switch 120.

The voltage controlled oscillator 110 provides an output signal VCO_OUT having an oscillation frequency according to the voltage of an applied signal. The switch 120 connects the analog data signal A_DATA to an input terminal of the voltage controlled oscillator 110 during a first period in which the voltage controlled oscillator 110 integrates the analog data signal A_DATA. The DC voltage is connected to the input terminal of the voltage controlled oscillator 110 during a second period in which the voltage controlled oscillator 110 does not integrate the analog data signal A_DATA.

FIG. 2 is a circuit diagram illustrating a switched voltage controlled oscillator of a second structure according to an embodiment of the present invention.

Referring to FIG. 2, the switched voltage controlled oscillator 200 of the second structure includes a voltage controlled oscillator 210 and a switch 220.

The voltage controlled oscillator 210 provides an output signal VCO_OUT having an oscillation frequency according to the voltage of an applied signal. The switch 220 connects the power supply voltage VDD to the voltage controlled oscillator 210 during the first period in which the voltage controlled oscillator 210 integrates the analog data signal A_DATA. ) And the power supply voltage VDD is blocked during the second period in which the voltage controlled oscillator 210 does not integrate the analog data signal A_DATA so that the voltage controlled oscillator 210 does not operate. do.

3 is a circuit diagram illustrating a voltage controlled oscillator element analog-to-digital converter having a nonlinearity correction function of a voltage controlled oscillator of a first structure according to an embodiment of the present invention.

Referring to FIG. 3, the voltage controlled oscillator initial analog-to-digital converter 300 having the nonlinearity correction function of the voltage controlled oscillator of the first structure includes the first voltage controlled oscillator initial analog-to-digital converter 310 and the second voltage control. An oscillating device-based analog-to-digital converter 320, a moving average filter (MAF) 330, and a mapping table 340 are included.

The first voltage controlled oscillation device initial analog-to-digital converter 310 receives an analog data signal A_DATA and provides a first output signal D_DATA1. The second voltage controlled oscillator device analog-to-digital converter 320 is a replica having the same configuration as the first voltage controlled oscillator device analog-to-digital converter 310, and receives a ramp signal to receive a second signal. Provide the output signal D_DATA2. The moving average filter 330 receives the second output signal D_DATA2 to obtain a moving average of the second output signal D_DATA2 indicating the nonlinear characteristic of the second analog-to-digital converter 300. M_AVG). The mapping table 340 stores the moving average M_AVG, which is a non-linear characteristic of the second voltage-controlled oscillating device-based analog-to-digital converter 320, and stores the moving average M_AVG in response to the first output signal D_DATA1. Accordingly, the first output signal D_DATA1 is corrected to provide a third output signal D_DATA3.

4 is a circuit diagram of a voltage controlled oscillator element analog-to-digital converter having a nonlinearity correction function of a voltage controlled oscillator of a second structure according to an embodiment of the present invention.

Referring to FIG. 4, the voltage controlled oscillator element analog-to-digital converter 400 having the nonlinearity correction function of the voltage controlled oscillator of the second structure includes an internal voltage controlled oscillator element analog-to-digital converter 410 and a moving average filter 420. ) And a mapping table 430.

The internal voltage controlled oscillation device initial analog-to-digital converter 410 is connected to the ramp signal before the analog-to-digital conversion of the received analog data signal A_DATA and analog-to-digital conversion of the received analog data signal A_DATA. After this is started, it is connected to the analog data signal A_DATA and converts the analog signal into a digital signal to provide a digital output signal. The moving average filter 420 is a second output which is an output signal of the internal voltage controlled oscillator initial analog-to-digital converter 410 when the internal voltage controlled oscillator initial analog-to-digital converter 410 responds to the ramp signal. The signal D_DATA2 is received to provide a moving average M_AVG of the second output signal D_DATA2 indicating the nonlinear characteristic of the internal voltage-controlled oscillator initial analog-digital converter 410. The mapping table 430 stores the moving average M_AVG, which is a non-linear characteristic of the voltage controlled oscillator device analog-to-digital converter 410, and the internal voltage controlled oscillator device analog-to-digital converter 410 stores the analog data. In response to the first output signal D_DATA1, which is an output signal of the internal voltage-controlled oscillating device initial analog-to-digital converter 410 when responding to the signal A_DATA, the first output signal D_DATA1 according to the nonlinear characteristic is received. The correction provides the third output signal D_DATA3.

6 is a circuit diagram illustrating a digitized receiver of a first structure according to an embodiment of the present invention.

Referring to FIG. 6, the digitized receiver 600 of the first structure includes a low noise amplifier (LNA) 610 and a voltage controlled oscillation device initial analog using the switched voltage controlled oscillator 100 of the first structure. A digital converter 620 and a digital signal processor (DSP) 630.

The low noise amplifier 610 amplifies the data while reducing the noise in the input analog data signal R_DATA including noise and data to provide an amplified analog data signal A_DATA. The voltage controlled oscillator initial analog-to-digital converter 620 using the switched voltage controlled oscillator 100 of the first structure converts the amplified analog data signal A_DATA into a digital signal to convert the digital output signal D_DATA. to provide. The digital signal processing device 630 processes the digital output signal D_DATA.

7 is a circuit diagram illustrating a digitized receiver of a second structure according to an embodiment of the present invention.

Referring to FIG. 7, the digitized receiver 700 of the second structure includes a low noise amplifier 710, a voltage controlled oscillator element analog-to-digital converter 720 using the switched voltage controlled oscillator 200 of the second structure, and Digital signal processing device 730 is included.

The low noise amplifier 710 amplifies the data while reducing the noise in the input analog data signal R_DATA including noise and data to provide an amplified analog data signal A_DATA. The voltage controlled oscillator initial analog-to-digital converter 720 using the switched voltage controlled oscillator 200 of the second structure converts the amplified analog data signal A_DATA into a digital signal to convert the digital output signal D_DATA. to provide. The digital signal processing device 730 processes the digital output signal D_DATA.

8 is a circuit diagram illustrating a digitized receiver having an I / Q path of a first structure according to an embodiment of the present invention.

Referring to FIG. 8, the digitized receiver 800 having the I / Q path of the first structure includes an inphase voltage using a low noise amplifier 810 and the switched voltage controlled oscillator 100 of the first structure. Controlled Oscillator Initial Analog-to-Digital Converter 820, Quadrature Voltage Controlled Oscillator Using the Switched Voltage Controlled Oscillator 100 of the First Structure 100-Digital Converter 830 and Digital Signal Processing Device 840 It includes.

The low noise amplifier 810 amplifies the data while reducing the noise in the input analog data signal R_DATA including noise and data to provide an amplified analog data signal A_DATA. The in-phase voltage-controlled oscillator initial analog-to-digital converter 820 using the switched voltage-controlled oscillator 100 of the first structure converts the amplified analog data signal A_DATA into a digital signal to output an in-phase output signal ( D_DATA_I). The quadrature voltage controlled oscillator initial analog-to-digital converter 830 using the switched voltage controlled oscillator 100 of the first structure includes a sampling clock CLK1 of the in-phase voltage controlled oscillator initial analog-to-digital converter 820. A sampling clock CLK2 having a phase difference of 90 degrees is provided, and the amplified analog data signal A_DATA is converted into a digital signal to provide a quadrature output signal D_DATA_Q. The digital signal processing apparatus 840 processes the in phase output signal D_DATA_I and the quadrature output signal D_DATA_Q.

9 is a circuit diagram illustrating a digitized receiver having an I / Q path of a second structure according to an embodiment of the present invention.

9, a digitized receiver 900 having an I / Q path of a second structure includes an inphase voltage using a low noise amplifier 910 and a switched voltage controlled oscillator 200 of the second structure. Controlled Oscillator Initial Analog-to-Digital Converter 920, Quadrature Voltage Controlled Oscillator Using the Switched Voltage Controlled Oscillator 200 of the Second Structure (200) and Analog Signal Processing Device (940) It includes.

The low noise amplifier 910 amplifies the data while reducing the noise in the input analog data signal R_DATA including noise and data to provide an amplified analog data signal A_DATA. The in-phase voltage-controlled oscillator initial analog-to-digital converter 920 using the switched voltage-controlled oscillator 200 of the second structure converts the amplified analog data signal A_DATA into a digital signal to output an in-phase output signal ( D_DATA_I). The quadrature voltage controlled oscillator element analog-to-digital converter 930 using the switched voltage controlled oscillator 200 of the second structure includes a sampling clock CLK1 of the in-phase voltage controlled oscillator element analog-to-digital converter 920. A sampling clock CLK2 having a phase difference of 90 degrees is provided, and the amplified analog data signal A_DATA is converted into a digital signal to provide a quadrature output signal D_DATA_Q. The digital signal processing apparatus 940 processes the in phase output signal D_DATA_I and the quadrature output signal D_DATA_Q.

1 to 9, a voltage controlled oscillator having a function of correcting nonlinearity of a switched voltage controlled oscillator and a voltage controlled oscillator according to an embodiment of the present invention, an analog-digital converter and a voltage-controlled oscillator initial analog-digital converter The operation of the digitized receiver will be described in detail.

The voltage-controlled oscillator initial analog-to-digital converter detects the amount of integrated phase by integrating the analog input signal during the sampling period and counting the number of edges of the voltage-controlled oscillator. In this case, the quantization error generated in the previous sampling period becomes the initial phase in the next sampling period, thereby naturally having a first-order noise shaping characteristic. In addition, since the counter counts the number of edges of the voltage-controlled oscillator after the voltage-controlled oscillator integrates the phase of the input signal, a sample-and-hold circuit is not necessary.

Fig. 10 is a circuit diagram showing an example of a receiver using a voltage controlled oscillator element analog-to-digital converter. Referring to FIG. 10, a receiver using the voltage-controlled oscillator device analog-to-digital converter includes a low noise amplifier, a voltage-controlled oscillator device analog-to-digital converter, and a digital signal processing device. In the conventional receiver, since the analog-to-digital conversion is performed through down conversion, decimation, and filtering, there are many operations to be performed in the analog stage before the analog-to-digital converter. However, when the receiver is implemented using the voltage-controlled oscillator device analog-to-digital converter as shown in FIG. 10, the desired signal is down-converted by sub-sampling in the voltage-controlled device-device analog-to-digital converter. Because noise shaping handles analog-to-digital conversion simultaneously with a high signal-to-noise ratio (SNR), the role of an analog filter can be transferred to the digital domain as much as possible, resulting in a digitized receiver. However, since the voltage controlled oscillator phase-integrates the input signal to provide an output signal, the voltage controlled oscillator has characteristics of a low pass filter (LPF) in the form of a sink function. In the case of using the receiver to implement the receiver, there is a problem in that the power of the output signal is significantly reduced as described below.

FIG. 11 is a graph illustrating a filtering effect of a receiver using the voltage-controlled oscillating device-based analog-to-digital converter of FIG. 10, for example, when the sampling frequency and the carrier frequency are the same. FIG. 11A is a graph illustrating the filtering effect when the period Ti in which the voltage controlled oscillator integrates the input signal is equal to the sampling period Ts. Referring to FIG. 11A, the voltage-controlled oscillator element analog-to-digital converter has a low-pass filter characteristic of a sink function in which the magnitude of the transfer function becomes zero at a frequency fi corresponding to the inverse of the integration period Ti. However, since the general voltage controlled oscillator integrates the input signal over the entire sampling period, the integration frequency fi and the sampling frequency fs are the same, and as shown in FIG. 11A, the output signal is filtered to obtain an output signal. Unable problem occurs. Therefore, as shown in FIG. 11B, the integrated signal fi may be greater than the sampling frequency fs to obtain the output signal. That is, the section Ti integrating the input signal must be shorter than the sampling period Ts. To this end, a modified voltage controlled oscillator is required to accept the DC voltage or stop the oscillation during the period in which the input signal is not integrated in the entire sampling period.

1 and 2 show a circuit diagram of a switched voltage controlled oscillator for implementing the modified voltage controlled oscillator.

In the switched voltage controlled oscillator 100 of the first structure shown in FIG. 1, the switch 120 is connected to the analog data signal A_DATA in a period in which the voltage controlled oscillator integrates the analog data signal A_DATA. In a section in which a signal A_DATA is connected to an input terminal of the voltage controlled oscillator and the voltage controlled oscillator does not integrate the analog data signal A_DATA, the switch 120 is connected to a DC voltage to convert the DC voltage to the voltage. Connect to the input of control oscillator.

In the switched voltage controlled oscillator 200 of the second structure shown in FIG. 2, the switch 220 is connected to the power supply voltage VDD in a period in which the voltage controlled oscillator integrates the analog data signal A_DATA. In the period where the voltage controlled oscillator does not integrate the analog data signal A_DATA, the switch 220 is separated from the power supply voltage VDD so that the voltage controlled oscillator does not operate.

6 and 7 are circuit diagrams illustrating a receiver in which a voltage controlled oscillator is replaced with the switched voltage controlled oscillator of FIGS.

In the voltage-controlled oscillating device-based analog-to-digital converter 600 of the first structure shown in FIG. The voltage-controlled oscillation device initial analog-to-digital converter 620 including a switched voltage controlled oscillator 100 of the first structure shown in FIG. 1 converts the analog data signal A_DATA into a digital signal and converts the digital signal D_DATA into The digital signal processor 630 processes the digital signal D_DATA.

In the voltage-controlled oscillator elementary analog-to-digital converter 700 of the second structure shown in FIG. 7, the low-noise amplifier 710 amplifies the received signal R_DATA while amplifying data while reducing noise, thereby amplifying the analog data signal A_DATA. The voltage controlled oscillator initial analog-to-digital converter 720 including the switched voltage controlled oscillator 200 of the second structure of FIG. 2 converts the analog data signal A_DATA into a digital signal to convert the digital signal D_DATA. The digital signal processor 730 processes the digital signal D_DATA.

The voltage controlled oscillator element analog-to-digital converter 600 of the first structure and the voltage controlled oscillator element analog-to-digital converter 700 of the second structure integrate an sampling frequency and an integrated analog data signal A_DATA. By adjusting the length of the interval it is possible to implement a Software Defined Radio (SDR) receiver. By selecting a sampling frequency according to carrier frequencies of various communication standards, one receiver can process data of various communication standards. In other words, for each communication standard, the zero-IF receiver can be implemented by making the sampling frequency equal to or less than the carrier frequency and making the sampling frequency slightly different from the carrier frequency or less than the carrier frequency. You can also implement a low-IF receiver by making it slightly different in frequency. In addition, as shown in FIG. 11, unwanted signals are adjusted by changing the integration period Ti integrating the analog data signal by adjusting the frequency fi at which the transfer function of the low-pass filter of the sink function becomes zero. You can also remove it.

FIG. 8 is a circuit diagram illustrating a digitized receiver having an I / Q path of a first structure implemented to have an in-phase signal and a quadrature signal using the digitized receiver of the first structure shown in FIG. A circuit diagram showing a digitized receiver having an I / Q path of a second structure implemented to have an in-phase signal and a quadrature signal using the digitized receiver of the second structure in FIG.

The digitized receiver 800 having the I / Q path of the first structure is voltage controlled using the switched voltage controlled oscillator 100 of the first structure in the digitized receiver 600 of the first structure of FIG. It is implemented by arranging a pair of oscillating elementary analog-to-digital converters 620 in parallel. At this time, the clock CLK1 of the in-phase voltage controlled oscillator element analog-to-digital converter and the clock CLK2 of the quadrature voltage controlled oscillator element analog-to-digital converter should be 90 degrees out of phase with each other.

The digitized receiver 900 having the I / Q path of the second structure is a voltage control using the switched voltage controlled oscillator 200 of the second structure in the digitized receiver 700 of the second structure of FIG. It is implemented by arranging a pair of oscillating elementary analog-to-digital converters 720 in parallel. At this time, the clock CLK1 of the in-phase voltage controlled oscillator element analog-to-digital converter and the clock CLK2 of the quadrature voltage controlled oscillator element analog-to-digital converter should be 90 degrees out of phase with each other.

The digitized receiver 800 having the I / Q path of the first structure and the digitized receiver 900 having the I / Q path of the second structure are also the digitized receiver 600 and the second structure of the first structure. As in the digitized receiver 700 of the structure, it is possible to implement a software defined radio (SDR) receiver by adjusting the sampling frequency and the length of the integration section integrating the amplified analog data signal A_DATA.

The digitized receiver 600 of the first structure, the digitized receiver 700 of the second structure, the digitized receiver 800 having the I / Q path of the first structure and the I / Q of the second structure The digitized receiver 900 having a path all uses a voltage-controlled oscillator element analog-to-digital converter. Since the voltage-controlled oscillator exhibits nonlinearity, the receiver is caused by a harmonic spur by nonlinearity of the voltage-controlled oscillator. May degrade performance. Therefore, a method of correcting the nonlinearity of the voltage controlled oscillator is needed. After determining the nonlinear characteristics of the voltage controlled oscillator by inserting the linear ramp input, if the digital output value of the actual analog data signal is corrected according to the nonlinear characteristics, a digital output signal such as that passed through the linear voltage controlled oscillator can be obtained. . The voltage-controlled oscillator element analog-to-digital converter having the nonlinearity correction function of such a voltage-controlled oscillator is shown in FIGS. 3 and 4.

FIG. 3 is a circuit diagram illustrating a voltage controlled oscillation device initial analog-to-digital converter 300 having a nonlinearity correction function of the voltage controlled oscillator of the first structure. The second digital output signal D_DATA2 output by applying a ramp signal to the second voltage controlled oscillator initial analog-to-digital converter 320 having the same configuration as the first voltage controlled oscillator initial analog-to-digital converter 310 is The nonlinear characteristic of the second voltage-controlled oscillating device initial analog-to-digital converter 320 is shown. The moving average filter 330 obtains a moving average of the second digital output signal D_DATA2 and stores the moving average in the mapping table 340. An analog data signal A_DATA is input to the first voltage controlled oscillation device initial analog-to-digital converter 310 and converted into a first digital output signal D_DATA1. The first digital output signal D_DATA1 is converted into the mapping table 340. ) Is linearly corrected to provide the third corrected digital output signal D_DATA3. Since the tuning characteristics of the voltage controlled oscillator may change due to factors such as voltage and temperature during operation, the non-linearity of the voltage controlled oscillator may be continuously corrected by periodically updating the mapping table 340 by inputting a ramp signal.

The voltage-controlled oscillator element analog-to-digital converter 300 having the nonlinearity correction function of the voltage-controlled oscillator of the first structure includes the first voltage-controlled oscillator element analog-to-digital converter 310 and the second voltage-controlled oscillator element. The voltage controlled oscillator included in the analog-to-digital converter 320 may be implemented by replacing the switched voltage controlled oscillator 100 of the first structure or the switched voltage controlled oscillator 200 of the second structure. In the case of implementing the switched voltage controlled oscillator 100 of the first structure, the digitized receiver 600 of the first structure and the digitized receiver 800 having the I / Q path of the first structure may be used. In the case of implementing the switched voltage controlled oscillator 200 of the second structure, the digitized receiver 900 having the second structure and the digitized receiver 900 having the I / Q path of the second structure may be used. Can be used).

Fig. 4 is a circuit diagram showing a voltage controlled oscillator initial analog-to-digital converter 400 having a nonlinearity correction function of the voltage controlled oscillator of the second structure. The internal voltage-controlled oscillation device initial analog-to-digital converter 410 receives a ramp signal as an input and provides a second digital output signal D_DATA2 before starting an analog-to-digital conversion operation of converting an analog data signal A_DATA into a digital signal. do. The second digital output signal D_DATA2 represents a non-linear characteristic of the internal voltage controlled oscillator initial analog-to-digital converter 410. The moving average filter 420 obtains a moving average of the second digital output signal D_DATA2 and stores the moving average in the mapping table 430. After the non-linear characteristic is stored in the mapping table 430, the analog data signal A_DATA is input to the internal voltage controlled oscillator device analog-to-digital converter 410 and converted into a first digital output signal D_DATA1. The first digital output signal D_DATA1 is linearly corrected according to the mapping table 430 to provide a finally corrected third digital output signal D_DATA3.

The voltage-controlled oscillator initial analog-to-digital converter 400 having the nonlinearity correction function of the voltage-controlled oscillator of the second structure 400 may include the voltage-controlled oscillator included in the internal voltage-controlled oscillator initial-analog-digital converter 410. It can be implemented by replacing the switched voltage controlled oscillator 200 of the structure. In the case of implementing the switched voltage controlled oscillator 200 of the second structure, the digitized receiver 700 of the second structure and the digitized receiver 900 having the I / Q path of the second structure may be used. Can be.

As shown in FIG. 5, the voltage controlled oscillator initial analog-to-digital converter 400 having the nonlinearity correction function of the voltage controlled oscillator of the second structure is connected to the internal voltage controlled oscillator initial analog-digital converter 410. The included voltage controlled oscillator may be implemented by replacing the switched voltage controlled oscillator 100 of the first structure. As shown in FIG. 5, the internal voltage controlled oscillator element analog-to-digital converter 410 of FIG. 4 is a switched voltage controlled oscillator element analog-to-digital converter 510 using the switched voltage controlled oscillator 100 of the first structure. Was replaced by. The voltage-controlled oscillator initial analog-to-digital converter 400 having the nonlinearity correction function of the voltage-controlled oscillator of the second structure is a voltage-controlled oscillator-element analog-to-digital converter having the nonlinearity correction function of the voltage-controlled oscillator of the first structure. Unlike 300, since the ramp signal can be applied only before the start of the analog-to-digital conversion operation, the mapping table representing the nonlinear characteristics of the voltage controlled oscillator cannot be regularly updated. Therefore, the offset correction unit 540 is further included to correct the change in the tuning characteristics of the voltage controlled oscillator due to factors such as voltage and temperature. The digital output signal D_DC by the DC voltage input to the voltage controlled oscillator is stored in the offset correcting unit 540 during a time period not integrating the voltage controlled oscillator. The first digital output signal D_DATA1, which is an output signal when the analog data signal A_DATA is input to the switched voltage controlled oscillation device initial analog-to-digital converter 510, is linearly corrected according to the mapping table 530, and thus The third digital output signal D_DATA3 is converted into a digital output signal D_DATA3, and the third digital output signal D_DATA3 is offset-corrected by the offset correction unit 540 to provide a finally corrected fourth digital output signal D_DATA4.

As shown in FIG. 5, the voltage controlled oscillator basic analog-to-digital converter 500 having the nonlinearity correction function of the voltage controlled oscillator includes the digitized receiver 600 of the first structure and the I / I of the first structure. It can be used for digitized receiver 800 with a Q path.

The digitized receiver using the voltage-controlled oscillator initial analog-to-digital converter according to the embodiment of the present invention processes the down-conversion and the analog-to-digital conversion simultaneously in the voltage-controlled oscillator initial analog-to-digital converter, thereby serving as an analog filter. It can be used effectively in the telecommunications industry by enabling programmable and digitized receivers.

As described above, the present invention has been described with reference to a preferred embodiment of the present invention, but those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be understood that modifications and changes can be made.

1 is a circuit diagram illustrating a switched voltage controlled oscillator of a first structure according to an embodiment of the present invention.

2 is a circuit diagram showing a switched voltage controlled oscillator of a second structure according to an embodiment of the present invention.

3 is a circuit diagram illustrating a voltage controlled oscillator element analog-to-digital converter having a nonlinearity correction function of a voltage controlled oscillator of a first structure according to an embodiment of the present invention.

4 is a circuit diagram of a voltage controlled oscillator element analog-to-digital converter having a nonlinearity correction function of a voltage controlled oscillator of a second structure according to an embodiment of the present invention.

FIG. 5 illustrates a voltage controlled oscillator using a switched voltage controlled oscillator of the first structure of FIG. 1 in a voltage controlled oscillator initial analog-to-digital converter having a nonlinearity correction function of the voltage controlled oscillator of the second structure of FIG. A circuit diagram showing the case.

6 is a circuit diagram illustrating a digitized receiver of a first structure according to an embodiment of the present invention.

7 is a circuit diagram illustrating a digitized receiver of a second structure according to an embodiment of the present invention.

8 is a circuit diagram illustrating a digitized receiver having an I / Q path of a first structure according to an embodiment of the present invention.

9 is a circuit diagram illustrating a digitized receiver having an I / Q path of a second structure according to an embodiment of the present invention.

Fig. 10 is a circuit diagram showing an example of a receiver using a voltage controlled oscillator element analog-to-digital converter.

FIG. 11 is a graph illustrating a filtering effect of a receiver using the voltage controlled oscillator initial analog-to-digital converter of FIG. 10, for example, when the sampling frequency and the carrier frequency are the same.

Claims (24)

A voltage controlled oscillator (VCO) for outputting an oscillation frequency according to an applied voltage; And Connect the analog data signal to the input terminal of the voltage controlled oscillator during the first period during which the voltage controlled oscillator integrates the analog data signal, and DC during the second period during which the voltage controlled oscillator does not integrate the analog data signal. And a switch for coupling a voltage to an input of the voltage controlled oscillator. A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage; And A second period during which the voltage controlled oscillator integrates a power supply voltage to the voltage controlled oscillator to operate the voltage controlled oscillator while the voltage controlled oscillator integrates the analog data signal, and wherein the voltage controlled oscillator does not integrate the analog data signal. Switched voltage controlled oscillator including a switch to block the power supply voltage for a period of time, the voltage controlled oscillator does not operate. A first voltage controlled oscillation device initial analog-to-digital converter providing a first output signal in response to the analog data signal; A second voltage controlled oscillator element analog-to-digital converter having the same configuration as the first voltage controlled oscillator element analog-to-digital converter and providing a second output signal in response to a ramp signal; A moving average filter (MAF) for providing a non-linear characteristic of the second analog-to-digital converter in response to the second output signal; And Nonlinearity of a voltage controlled oscillator including a mapping table for storing the nonlinear characteristic and correcting the first output signal according to the nonlinear characteristic in response to the first output signal to provide a third output signal Voltage controlled oscillator with analog correction. 4. The voltage controlled oscillator unit of claim 3, wherein the voltage controlled oscillator unit is included in the first analog-to-digital converter. A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage; And During the first period during which the voltage controlled oscillator integrates the analog data signal, the analog data signal is connected to an input terminal of the voltage controlled oscillator. During the second period during which the voltage controlled oscillator does not integrate the analog data signal, A switched voltage controlled oscillator comprising a switch for connecting a DC voltage to the input terminal of the voltage controlled oscillator, The voltage controlled oscillator unit included in the second analog-to-digital converter of the second voltage controlled oscillator has the same configuration as that of the voltage controlled oscillator unit included in the first analog-to-digital converter of the first voltage controlled oscillator. Voltage-controlled oscillating device ultra-analog-to-digital converter with nonlinearity correction. 4. The voltage controlled oscillator unit of claim 3, wherein the voltage controlled oscillator unit is included in the first analog-to-digital converter. A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage; And The voltage controlled oscillator operates by connecting a power supply voltage to the voltage controlled oscillator during the first period in which the voltage controlled oscillator integrates the analog data signal, and wherein the voltage controlled oscillator does not integrate the analog data signal. It is a switched voltage controlled oscillator including a switch to block the power supply voltage for two intervals so that the voltage controlled oscillator does not operate, The voltage-controlled oscillator portion included in the second analog-to-digital converter of the second voltage controlled oscillator has the same configuration as that of the voltage-controlled oscillator portion included in the first analog-to-digital converter of the first voltage-controlled oscillator. Voltage controlled oscillator with analog correction function. An internal voltage-controlled oscillator initial analog-to-digital converter for providing a digital output signal by converting an analog signal into a digital signal in response to a ramp signal before the analog-to-digital conversion starts and in response to an analog data signal after the analog-to-digital conversion starts; Non-linear characteristics of the internal voltage controlled oscillator initial analog-digital converter in response to the second output signal of the internal voltage controlled oscillator initial analog-digital converter when the internal voltage controlled oscillator initial analog-digital converter responds to the ramp signal Moving average filter to provide; And Store the nonlinear characteristic, and in response to the first output signal of the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the analog data signal; And a nonlinearity correction function of the voltage controlled oscillator including a mapping table for correcting the first output signal to provide a third output signal. The voltage controlled oscillator unit of claim 6, wherein the voltage controlled oscillator unit is included in the internal analog-to-digital converter. A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage; And A switch connected to the analog data signal during a first period in which the voltage controlled oscillator integrates the analog data signal, and a switch connected to a DC voltage during a second period in which the voltage controlled oscillator does not integrate the analog data signal; Included is a switched voltage controlled oscillator, An offset for providing a fourth output signal by correcting the offset of the third output signal through an output signal of the voltage controlled oscillator initial analog-to-digital converter when the voltage controlled oscillator initial analog-to-digital converter responds to the DC voltage Voltage-controlled oscillator device analog-to-digital converter having a non-linearity correction function of the voltage-controlled oscillator further comprising a correction unit. The voltage controlled oscillator unit of claim 6, wherein the voltage controlled oscillator unit is included in the internal analog-to-digital converter. A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage; And The voltage controlled oscillator operates by connecting a power supply voltage to the voltage controlled oscillator during the first period in which the voltage controlled oscillator integrates the analog data signal, and wherein the voltage controlled oscillator does not integrate the analog data signal. A voltage controlled oscillator having a non-linearity correction function of a voltage controlled oscillator, comprising: a switch for interrupting the power supply voltage so that the voltage controlled oscillator does not operate for two sections. . A low noise amplifier (LNA) for providing an amplified analog data signal by amplifying the data while reducing the noise in an input analog data signal including noise and data; The voltage-controlled oscillator outputting the oscillation frequency according to the applied voltage and the amplified analog data signal are connected to an input terminal of the voltage-controlled oscillator during the first period in which the voltage-controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch for connecting a DC voltage to an input terminal of the voltage controlled oscillator during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal, and converting the amplified analog data signal into a digital signal. A voltage controlled oscillator device analog-to-digital converter that converts a signal to provide a digital output signal; And And a digital signal processor (DSP) for processing the digital output signal. 10. The method of claim 9, wherein the voltage controlled oscillator device analog-to-digital converter, The voltage-controlled oscillator outputting the oscillation frequency according to the applied voltage and the amplified analog data signal are connected to an input terminal of the voltage-controlled oscillator during the first period in which the voltage-controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch for connecting a DC voltage to an input terminal of the voltage controlled oscillator during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal, and responding to the amplified analog data signal. A first voltage controlled oscillator device analog-to-digital converter for providing a first output signal; A second voltage controlled oscillator device analog-to-digital converter having the same configuration as the first voltage controlled oscillator device analog-to-digital converter and providing a second output signal in response to a linear ramp signal; A moving average filter providing nonlinear characteristics of the second analog-to-digital converter of the second voltage controlled oscillator in response to the second output signal; And A non-linearity correction function of a voltage controlled oscillator including a mapping table for storing the nonlinear characteristic and correcting the first output signal according to the nonlinear characteristic in response to the first output signal to provide a third output signal. Voltage controlled oscillator A digitized receiver characterized in that the first analog-to-digital converter. 10. The method of claim 9, wherein the voltage controlled oscillator device analog-to-digital converter, The voltage controlled oscillator outputting the oscillation frequency according to the applied voltage and the voltage controlled oscillator are connected to the amplified analog data signal during the first period of integrating the amplified analog data signal and the voltage controlled oscillator is amplified. A switched voltage controlled oscillator having a switch connected to the DC voltage during a second period in which the analog data signal is not integrated, the switch responds to a ramp signal before the start of the analog-to-digital conversion and after the start of the analog-to-digital conversion An internal voltage controlled oscillation device initial analog-to-digital converter for converting an analog signal into a digital signal and providing a digital output signal in response to the provided signal; Non-linear characteristics of the internal voltage controlled oscillator initial analog-digital converter in response to the second output signal of the internal voltage controlled oscillator initial analog-digital converter when the internal voltage controlled oscillator initial analog-digital converter responds to the ramp signal Moving average filter to provide; Store the nonlinear characteristic and responsive to the first output signal of the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the amplified analog data signal. A mapping table for correcting the first output signal according to a characteristic to provide a third output signal; And A fourth output signal is provided by correcting an offset of the third output signal through an output signal of the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the DC voltage. And a voltage controlled oscillator having a nonlinear correction function of a voltage controlled oscillator including an offset correction unit. 10. The method of claim 9, wherein the voltage controlled oscillator device analog-to-digital converter, And a sampling frequency and a length of an integration section for integrating the analog output signal of the low noise amplifier. A low noise amplifier which amplifies the data and provides an amplified analog data signal while reducing the noise in an input analog data signal including noise and data; A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage and a voltage controlled oscillator by connecting a power supply voltage to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch to cut off the power supply voltage so that the voltage controlled oscillator does not operate during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. A voltage controlled oscillation device initial analog-to-digital converter for converting an analog data signal into a digital signal to provide a digital output signal; And And a digital signal processing device for processing said digital output signal. The method of claim 13, wherein the voltage controlled oscillator device analog-to-digital converter, A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage and a voltage controlled oscillator by connecting a power supply voltage to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch to cut off the power supply voltage so that the voltage controlled oscillator does not operate during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. A first voltage controlled oscillation device initial analog-to-digital converter providing a first output signal in response to the analog data signal; A second voltage controlled oscillator device analog-to-digital converter having the same configuration as the first voltage controlled oscillator device analog-to-digital converter and providing a second output signal in response to a linear ramp signal; A moving average filter providing nonlinear characteristics of the second analog-to-digital converter in response to the second output signal; And A non-linearity correction function of a voltage controlled oscillator including a mapping table for storing the nonlinear characteristic and correcting the first output signal according to the nonlinear characteristic in response to the first output signal to provide a third output signal. Voltage controlled oscillator A digitized receiver characterized in that the first analog-to-digital converter. The method of claim 13, wherein the voltage controlled oscillator device analog-to-digital converter, A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage and a voltage controlled oscillator by connecting a power supply voltage to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch to block the power supply voltage so that the voltage controlled oscillator does not operate during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. An internal voltage-controlled oscillator initial analog-to-digital converter for converting an analog signal into a digital signal and providing a digital output signal in response to a ramp signal before the start of conversion and in response to the amplified analog data signal after the start of analog-to-digital conversion; Non-linear characteristics of the internal voltage controlled oscillator initial analog-digital converter in response to the second output signal of the internal voltage controlled oscillator initial analog-digital converter when the internal voltage controlled oscillator initial analog-digital converter responds to the ramp signal Moving average filter to provide; And Store the nonlinear characteristic and responsive to the first output signal of the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the amplified analog data signal. And a voltage controlled oscillator device analog-to-digital converter having a nonlinearity correction function of a voltage controlled oscillator including a mapping table for correcting the first output signal to provide a third output signal. The method of claim 13, wherein the voltage controlled oscillator device analog-to-digital converter, And a sampling frequency and a length of an integration section for integrating the analog output signal of the low noise amplifier. A low noise amplifier which amplifies the data and provides an amplified analog data signal while reducing the noise in an input analog data signal including noise and data; The voltage-controlled oscillator outputting the oscillation frequency according to the applied voltage and the amplified analog data signal are connected to an input terminal of the voltage-controlled oscillator during the first period in which the voltage-controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch for connecting a DC voltage to an input terminal of the voltage controlled oscillator during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. An in-phase voltage controlled oscillator device analog-to-digital converter that converts into a digital signal to provide an inphase output signal; The voltage-controlled oscillator outputting the oscillation frequency according to the applied voltage and the amplified analog data signal are connected to an input terminal of the voltage-controlled oscillator during the first period in which the voltage-controlled oscillator integrates the amplified analog data signal. And a phased voltage controlled oscillator having a switch for connecting a DC voltage to an input terminal of the voltage controlled oscillator during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. Quadrature voltage controlled oscillator ultra analog-to-digital converter having a sampling clock that is 90 degrees out of phase with the sampling clock of the digital converter and converting the amplified analog data signal into a digital signal to provide a quadrature output signal. ; And And a digital signal processing device for processing the in-phase output signal and the quadrature output signal. 18. The method of claim 17, wherein the in-phase voltage controlled oscillator device analog-to-digital converter and the quadrature voltage controlled oscillator device analog-to-digital converter, The voltage-controlled oscillator outputting the oscillation frequency according to the applied voltage and the amplified analog data signal are connected to an input terminal of the voltage-controlled oscillator during the first period in which the voltage-controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch for connecting a DC voltage to an input terminal of the voltage controlled oscillator during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal, and responding to the amplified analog data signal. A first voltage controlled oscillator device analog-to-digital converter for providing a first output signal; A second voltage controlled oscillator device analog-to-digital converter having the same configuration as the first voltage controlled oscillator device analog-to-digital converter and providing a second output signal in response to a linear ramp signal; A moving average filter providing nonlinear characteristics of the second analog-to-digital converter in response to the second output signal; And A non-linearity correction function of a voltage controlled oscillator including a mapping table for storing the nonlinear characteristic and correcting the first output signal according to the nonlinear characteristic in response to the first output signal to provide a third output signal. Voltage controlled oscillator A digitized receiver characterized in that the first analog-to-digital converter. 18. The method of claim 17, wherein the in-phase voltage controlled oscillator device analog-to-digital converter and the quadrature voltage controlled oscillator device analog-to-digital converter, The voltage controlled oscillator outputting the oscillation frequency according to the applied voltage and the voltage controlled oscillator are connected to the amplified analog data signal during the first period of integrating the amplified analog data signal and the voltage controlled oscillator is amplified. A switched voltage controlled oscillator having a switch connected to the DC voltage during a second period in which the analog data signal is not integrated, the switch responds to a ramp signal before the start of the analog-to-digital conversion and after the start of the analog-to-digital conversion An internal voltage controlled oscillation device initial analog-to-digital converter for converting an analog signal into a digital signal and providing a digital output signal in response to the provided signal; Non-linear characteristics of the internal voltage controlled oscillator initial analog-digital converter in response to the second output signal of the internal voltage controlled oscillator initial analog-digital converter when the internal voltage controlled oscillator initial analog-digital converter responds to the ramp signal Moving average filter to provide; Store the nonlinear characteristic and responsive to the first output signal of the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the amplified analog data signal. A mapping table configured to provide a third output signal by correcting the first output signal according to the first output signal; And A fourth output signal is provided by correcting an offset of the third output signal through an output signal of the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the DC voltage. And a voltage controlled oscillator having a nonlinear correction function of a voltage controlled oscillator including an offset correction unit. 18. The method of claim 17, wherein the in-phase voltage controlled oscillator initial analog-to-digital converter and quadrature voltage controlled oscillator initial analog-to-digital converter are: And a sampling frequency and a length of an integration section for integrating the analog output signal of the low noise amplifier. A low noise amplifier which amplifies the data and provides an amplified analog data signal while reducing the noise in an input analog data signal including noise and data; A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage and a voltage controlled oscillator by connecting a power supply voltage to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch to cut off the power supply voltage so that the voltage controlled oscillator does not operate during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. An in-phase voltage controlled oscillator device for converting an analog data signal into a digital signal to provide an in-phase output signal; A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage and a voltage controlled oscillator by connecting a power supply voltage to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch to block the power supply voltage so that the voltage controlled oscillator does not operate during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. A quadrature voltage controlled oscillator with a sampling clock that is 90 degrees out of phase with the sampling clock of the first analog-to-digital converter and converts the amplified analog data signal into a digital signal to provide a quadrature output signal. Digital converters; And And a digital signal processing device for processing the in-phase output signal and the quadrature output signal. 22. The method of claim 21, wherein the in-phase voltage controlled oscillator device analog-to-digital converter and quadrature voltage controlled oscillator device analog-to-digital converter, A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage and a voltage controlled oscillator by connecting a power supply voltage to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch to cut off the power supply voltage so that the voltage controlled oscillator does not operate during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. A first voltage controlled oscillation device initial analog-to-digital converter providing a first output signal in response to the analog data signal; A second voltage controlled oscillator device analog-to-digital converter having the same configuration as the first voltage controlled oscillator device analog-to-digital converter and providing a second output signal in response to a linear ramp signal; A moving average filter providing nonlinear characteristics of the second analog-to-digital converter in response to the second output signal; And A non-linearity correction function of a voltage controlled oscillator including a mapping table for storing the nonlinear characteristic and correcting the first output signal according to the nonlinear characteristic in response to the first output signal to provide a third output signal. Voltage controlled oscillator A digitized receiver characterized in that the first analog-to-digital converter. 22. The method of claim 21, wherein the in-phase voltage controlled oscillator device analog-to-digital converter and quadrature voltage controlled oscillator device analog-to-digital converter, A voltage controlled oscillator for outputting an oscillation frequency in accordance with an applied voltage and a voltage controlled oscillator by connecting a power supply voltage to the voltage controlled oscillator during a first period in which the voltage controlled oscillator integrates the amplified analog data signal. And a switched voltage controlled oscillator having a switch to block the power supply voltage so that the voltage controlled oscillator does not operate during a second period in which the voltage controlled oscillator does not integrate the amplified analog data signal. An internal voltage-controlled oscillator initial analog-to-digital converter for converting an analog signal into a digital signal and providing a digital output signal in response to a ramp signal before the start of conversion and in response to the amplified analog data signal after the start of analog-to-digital conversion; Non-linear characteristics of the internal voltage controlled oscillator initial analog-digital converter in response to the second output signal of the internal voltage controlled oscillator initial analog-digital converter when the internal voltage controlled oscillator initial analog-digital converter responds to the ramp signal Moving average filter to provide; And Store the nonlinear characteristic and responsive to the first output signal of the internal voltage controlled oscillator initial analog-to-digital converter when the internal voltage controlled oscillator initial analog-to-digital converter responds to the amplified analog data signal. And a voltage controlled oscillator device analog-to-digital converter having a nonlinearity correction function of a voltage controlled oscillator including a mapping table for correcting the first output signal to provide a third output signal. 22. The method of claim 21, wherein the in-phase voltage controlled oscillator device analog-to-digital converter and quadrature voltage controlled oscillator device analog-to-digital converter, And a sampling frequency and a length of an integration section for integrating the analog output signal of the low noise amplifier.

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