KR101009421B1 - Super regenerative receiver and method for saving power thereof - Google Patents

Abstract

The present invention relates to a power reduction method in a low power super regenerative receiver and a super regenerative receiver. The super regenerative receiving apparatus of the present invention includes an oscillator and a power supply control unit which applies power only within an operating time of the oscillator depending on whether an input signal is present or not. The power control unit reduces the power by driving the entire super-regenerative receiving device only within a section in which the oscillator operates.

Description

Super regenerative receiver and method for saving power

The present invention relates to a low power super regenerative receiver. In particular, the present invention relates to a super regenerative receiver which reduces the average power of the receiver by periodically turning off the super regenerative receiver when the power of the oscillator periodically turned on / off is turned off.

The present invention is derived from the research conducted as part of the IT new growth engine core technology development project of the Ministry of Information and Communication and the Ministry of Information and Telecommunication Research and Development. [Task Management Number: 2005-S-106-03, Project Name: Sensor Tag for RFID / USN] And sensor node technology development].

Super regenerative receivers are known as receivers with moderate sensitivity and low cost. Super regenerative receivers have been widely applied to such fields as remote control toys, information systems and monitoring devices.

The super regenerative receiver detects a signal according to the start-up time of the oscillator. The startup time of the oscillator is based on the power and frequency of the signal received by the antenna. The oscillator can also oscillate very slowly due to thermal noise even in the absence of an input signal.

Conventional super-play receivers can be classified into two categories: general super-play receivers oversampling input signals and synchronous super-play receivers that sample input signals only once.

The need to extend the average life time of a wireless sensor network further reduces the power consumption of the receiver. However, current receiver architectures have difficulty in meeting low power requirements without compromising reception sensitivity. That is, the conventional general super regenerative receiver and the synchronous super regenerative receiver are both difficult to reduce the additional power consumption by the current technology.

In the present invention, in order to solve the above problems, the concept of controlling the duty cycle power supply used as a quench of the super-receiver receiver to reduce the average power consumption of the super-receiver receiver while maintaining the reception sensitivity and selectivity. By introducing a, the duty cycle ratio is adjusted to periodically turn off the super regenerative receiver, thereby reducing the average power of the receiver.

The present invention reduces the average power consumption of the receiver while maintaining the reception sensitivity and selectivity by using the power control unit used as a quench in the super regenerative receiver. In addition, by adjusting the duty cycle frequency of the power control unit, it is possible to easily adjust the average power consumption of the wake-up receiver to meet the requirements of the wake-up receiver. In addition, the present invention is also suitable for applications for other low power low speed data.

In one preferred embodiment of the present invention, the super-receiving receiving device includes an oscillator whose start time for starting oscillation differs depending on the presence of an input signal; It includes; a power control unit for applying power only within the operating time of the oscillator.

Preferably, the power controller applies power using a duty cycle, and a duty cycle ratio indicating a ratio of a clock-on period to a clock-off period of the duty cycle is a duty cycle ratio. It is characterized by being changed by adjusting.

In another preferred embodiment of the present invention, the super regenerative receiving apparatus includes an insulation amplifier unit for transmitting a signal to the oscillator and blocking the input signal from flowing in reverse from the oscillator; An envelope detector detecting an envelope of the oscillator; And an amplifier for amplifying the envelope, wherein the power controller is connected to the insulation amplifier, the oscillator, the envelope detector, and the amplifier.

Preferably, the super-playback receiving apparatus of the present invention is characterized in that the power control unit increases the off section of the power supply until the frequency of the duty cycle is equal to the data rate of the input signal.

In another preferred embodiment of the present invention, in the method of reducing power in the super regenerative receiver, the super regenerative receiver comprises: an oscillator whose start time for starting oscillation differs depending on the presence of an input signal; It includes; and a power control step of applying power to the super regenerative receiving device only within the operating time of the oscillator.

In another preferred embodiment of the present invention, in the method of reducing power in the super regenerative receiver, the super regenerative receiver transmits a signal to the oscillator and insulates the input signal from being reversed from the oscillator. Amplification unit; An envelope detector detecting an envelope of the oscillator; And an amplifier for amplifying the envelope, wherein the power supply control step applies power to the insulation amplifier, the oscillator, the envelope detector, and the amplifier only within an operating time of the oscillator. .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the same elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 (a) and (b) show a configuration diagram and a timing diagram of a conventional general super regenerative receiver.

The general super reproduction receiver 100 oversamples the input signal 101. In this case, the quench frequency needs to be much larger than the input signal data rate (R). In the low pass filter 140, in order to remove the quench signal from the signal passing through the envelope detector 130, the cutoff frequency of the low pass filter needs to be much larger than the input signal data rate R and much smaller than the quench frequency.

Therefore, the quench frequency should be at least two times larger than the input signal data rate (R). After passing through the low pass filter 140, the input signal 101 is demodulated as a result. The demodulated signal is then amplified by the baseband amplifier 150 and restored to the digital signal 161 by the slice 160. do.

2 (a) and (b) show a configuration diagram and a timing diagram of a conventional synchronous super regenerative receiver.

The synchronous super reproduction receiver 200 samples the input signal only once. The quench frequency is approximately equal to the input signal data rate R, and the input signal data rate R is rapidly increased. That is, in the synchronous super-play receiver shown in FIGS. 2A and 2B, since the number of bits can be received in the same time as in FIGS. 1A and 1B, the data rate increases.

The reason for this is as follows. In the structures shown in FIGS. 1A and 1B, since an input signal of one bit is oversampled, one bit of data can be represented after at least several clock cycles. However, in the synchronous super reproduction receiver shown in Figs. 2A and 2B, one bit of data can be represented by one sampling operation on an input signal of one bit. Compared to the illustrated structure, a much larger number of bits can be received in the same time, thereby increasing the data rate.

 In this case, the data rate loop filter 270 of the synchronous super reproduction receiver 200 is used to synchronize the input signal and the quench signal.

The basic concept of the super regenerative receiver proposed in the present invention is different from the conventional concept in which the conventional super regenerative receiver shown in FIGS. 1 to 2 periodically turns on / off only the oscillator. It's off.

In addition, the average power consumption is further reduced by extending the section in which the super regenerative receiver is powered off. Further, the off section of the total power supply of the super reproduction receiver can be increased until the clock frequency of the input signal data rate R and the control signal for controlling the total power supply of the super reproduction receiver are the same. Hereinafter will be described an embodiment of the super-receiver receiver proposed in the present invention.

3 (a) and 3 (b) show a configuration diagram and a timing diagram of a super regenerative receiver for controlling a duty cycle as a preferred embodiment of the present invention.

The super-receiver receiver 300 proposed in the present invention periodically applies or cuts power to the entire super-receiver receiver 300 periodically, unlike the conventional method in which only the oscillator was periodically turned on and off. That is, the super regenerative receiver 300 of the present invention detects a signal only within an operating time (start-up period) when the oscillator 320 starts oscillation.

As a result, by shutting off the power to the entire super-receiver receiver 300 while the oscillator 320 is turned off, power loss caused when power is applied can be reduced. In addition, the average power loss can be further reduced by increasing the off period of the entire super-regeneration receiver 300.

In the present invention, power consumption of the second reproduction receiver 300 is a power supply control clock (372, 472) The duty cycle ratio can be adjusted by controlling the duty cycle ratio, and the duty cycle ratio can be adjusted by adjusting the duty cycle frequency. That is, in the present invention, the duty cycle frequency of the power supply control clocks 372 and 472 is increased until the frequency equal to the input data rate. The input data rate refers to the number of bits transmitted in one second.

To this end, the ultra-renewable receiver 300 according to the present invention includes an insulation amplifier 310, an oscillator 320, an envelope detector 330, an amplifier 340, a slice 350 and a power control unit 360. Include.

The function of each component is as follows.

The insulation amplifier 310 provides reverse blocking between the oscillator 320 and the antenna and introduces a signal into the oscillator 320.

 The oscillator 320 detects a signal based on a start-up time difference. The oscillator is controlled by a quench signal generator (see FIGS. 1A and 2A) or a power supply controller 360 that generates a signal that blocks the oscillator.

The envelope detector 330 detects an envelope of the oscillator 320, and the amplifier 340 amplifies the envelope signal of the oscillator 320 so that the slice 350 can operate properly. The slice 350 recovers the digital signal from the envelope signal amplified by the amplifier 340.

The power controller 360 is connected to the insulation amplifier 310, the oscillator 320, the envelope detector 330, and the amplifier 340 to generate a duty cycle signal to turn on / off the entire circuit power.

The signal received from the antenna is introduced into the oscillator 320 through the insulation amplifier 310 only when the super regenerative receiver 300 is turned on by the power controller 360. Then, the oscillator 320 starts oscillation by sampling the signal introduced by the insulation amplifier 310.

The oscillator 320 oscillates a small signal before power is applied to the super regenerative receiver 300 by the power controller 360. Even after amplifying by the amplifier 340, the signal level smaller than the reference voltage is maintained.

3 (b) shows a timing diagram of the receiver according to the operation of the receiver of FIG. 3 (a). Here, the RF input 371 represents an RF signal modulated by OOK. The power control clock 372 represents a signal for controlling the power in a duty cycle by the power controller 360.

The digital signal converted through the slice 350 is '0'. However, when there is an input signal in the antenna, the oscillator 320 oscillates quickly before power is cut off to the entire receiver (373a). In this case, the amplitude of the oscillated signal is very large and saturated. At this time, the digital signal is detected as '1' (374a).

4 (a) and 4 (b) show a configuration diagram and a timing diagram of a super regenerative receiver which sequentially controls a duty cycle as a preferred embodiment of the present invention.

FIG. 4 (a) shows an embodiment in which the super regenerative receiver of FIG. 3 (a) is improved.

Since parts of FIG. 4A corresponding to FIG. 3A perform substantially the same or similar functions, the description of the parts related to FIG. 3A will be referred to.

A duty cycle signal 473 is generated from the power supply control clock 472 to control the on / off of the power supply of the oscillator 420. In this case, the duty cycle signal 473 is smaller than the power control clock 472.

That is, by applying the smaller duty cycle signal 473 generated through the delay unit 461 to the oscillator 420, another configuration in the super-receiver receiver 400 before the oscillator 420 samples the input signal. The elements are turned on to enter the stabilization state.

The delay unit 461 delays the power control clock input from the power controller 460 to generate a delayed power control clock, and generates a power control clock from the oscillator 420 through the AND block 462. That is, the ultra-renewable receiver 400 of FIG. 4A allows other components to be turned on to enter a stabilized state before the oscillator 420 samples the input signal through the delay unit 461.

 The super regenerative receiver 400 of the present invention may further include an additional calibration circuit (not shown) that periodically adjusts the oscillation frequency and the Q factor of the oscillator to improve the performance of the receiver.

In this case, during the calibration section and the sensing section, the super-receiver receiver 400 is turned on to adjust the Q factor and the oscillation frequency. During the detection period, the receiver performs the operation as described above in connection with FIG. 4 without the calibration circuit. An example of a calibration circuit is a digital calibration circuit. The calibration circuit senses the oscillating frequency and, when the frequency is misaligned, adjusts the capacitance component of the oscillator and gives feedback to oscillate at a constant frequency.

Here, the calibration section means a section for adjusting the oscillator to oscillate at a constant frequency while the receiver is turned off. That is, it represents a section excluding the sensing section and the time turned on. In addition, the detection section represents a section in which the oscillator oscillates to reach a steady state and detect a signal passing through an envelope detector.

5 shows a super-reproducing receiver as one preferred embodiment of the present invention.

The super reproduction receiver 500 includes an oscillator 530 and a power control unit 510.

The oscillator 530 varies depending on whether the input signal is present or not. As a preferred embodiment of the present invention, the power control unit 510 supplies power to the insulation amplifier 520, the oscillator 530, the envelope detector 540, and the amplifier 550 only within the operating time of the oscillator 530. Is authorized.

As another embodiment of the present invention, the ultra-renewable receiver 500 may further include a delay unit (not shown), as in the case of the embodiment described with reference to FIGS. 4A and 4B.

One end of the delay unit is connected to the power control unit 510 and the other end is connected to the oscillator 530 so that the power control unit 510 supplies the power of the insulation amplifier 520, the envelope detector 540, and the amplifier 550. After the stable on, power is applied to the oscillator 530.

It should be noted that this is only an embodiment in which the present invention is implemented. In addition to the above components, the components required for implementing the super-renewable reception apparatus may also be connected to the power control unit 510 to reduce the power. It should be noted that.

The invention can also be embodied as computer readable code on a computer readable recording medium. Computer-readable recording media include all kinds of recording devices that store data that can be read by a computer system.

Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, which are also implemented in the form of carrier waves (for example, transmission over the Internet). It also includes. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

The best embodiments have been disclosed in the drawings and specification above. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims.

Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 (a) and (b) show a configuration diagram and a timing diagram of a general super regenerative receiver.

2 (a) and 2 (b) show a configuration diagram and a timing diagram of a synchronous super regenerative receiver.

3 (a) and 3 (b) show a configuration diagram and a timing diagram of a super regenerative receiver for controlling a duty cycle as a preferred embodiment of the present invention.

4 (a) and 4 (b) show a configuration diagram and a timing diagram of a super regenerative receiver which sequentially controls a duty cycle as a preferred embodiment of the present invention.

5 shows a super-reproducing receiver as one preferred embodiment of the present invention.

Claims (12)

An oscillator whose start time for starting oscillation differs depending on the presence of an input signal; A power control unit which applies power only within an operating time of the oscillator; An insulation amplifier which transmits a signal to the oscillator and blocks the input signal from flowing backward from the oscillator; An envelope detector detecting an envelope of the oscillator; And An amplifier for amplifying the envelope; and And a delay unit connected to the power control unit and delaying power applied by the power control unit. The power controller is connected to the insulation amplifier, the oscillator, the envelope detector and the amplifier, the oscillator is connected to the delay unit, the power controller is connected to the insulation amplifier, the envelope detector and the amplifier. If the power is supplied, the super-receiving receiving device characterized in that for receiving the delayed power through the delay unit. delete The duty cycle ratio of claim 1, wherein the power control unit applies power using a duty cycle, and a duty cycle ratio indicating a ratio of a clock-on section to a clock-off section of the duty cycle is a duty cycle ratio. Super regenerative receiver, characterized in that by changing the frequency of the. delete The method of claim 3, wherein the off section of the power supply And increasing the frequency of the duty cycle until the data rate of the input signal is the same. The method of claim 1, wherein the oscillator Ultra regenerative receiver characterized in that the oscillation frequency is adjusted through a calibration circuit. As a method of reducing power in a super regenerative receiver The ultra-reproducing receiver includes an oscillator whose start time for starting oscillation differs depending on the presence of an input signal; An insulation amplifier which transmits a signal to the oscillator and blocks the input signal from flowing backward from the oscillator; An envelope detector detecting an envelope of the oscillator; And an amplifier for amplifying the envelope. Including, the method is A power control step of applying power to the insulation amplifier, the oscillator, the envelope detector, and the amplifier only within an operating time of the oscillator; And And a delay step of delaying the power generated in the power control step. In this case, the power applied to the oscillator in the power control step is inputted after the delay step, and the insulation amplifier unit Power reduction method in the super-receiving receiving device, characterized in that the power generated in the power control step is directly input to the envelope detector and the amplifier. delete The method of claim 7, wherein In the power control step, a power is applied using a duty cycle, and a duty cycle ratio indicating a ratio of a clock on period to a clock off period is changed by adjusting a frequency of the duty cycle. A method for reducing power in a super regenerative receiver. delete The method of claim 9, wherein the off section of the power supply And reducing the frequency of the duty cycle until the data rate of the input signal is the same. 8. The oscillator of claim 7, wherein the oscillator A method for reducing power in a super regenerative receiver, characterized in that the oscillation frequency is adjusted by means of a calibration circuit.

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