KR20170015591A - Radio frequency signal receiving apparatus - Google Patents

Abstract

According to the present invention, disclosed is a radio frequency receiving apparatus. The apparatus comprises: a low noise amplification unit including a first field effect transistor (FET) of a common gate and a second FET of a common source; a mixer unit including a first mixer connected to a drain of the first FET and a second mixer connected to a drain of the second FET; and a trans-impedance amplification unit using an output signal of the first and second mixers as an input. The mixer adjusts at least one of a bias voltage of the first mixer and a bias voltage of the second mixer such that the noise outputted to the first mixer is identical to the noise outputted to the second mixer, thereby reducing the noise outputted from the trans-impedance amplification unit.

Description

[0001] RADIO FREQUENCY SIGNAL RECEIVING APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiving apparatus, and more particularly, to a radio receiving apparatus for reducing noise by adjusting a bias voltage of a mixer.

In general, various devices such as mobile phones, smart phones, TV receivers, and radios can receive radio signals. A receiver of such a wireless terminal may be described as a block as shown in FIG.

Fig. 1 is an example of a block diagram relating to a conventional receiving terminal 50. Fig. 1, the receiver 50 includes an antenna unit 10, a low noise amplifier (LNA) 20, a mixer unit 30, a trans- (40), and the like. Hereinafter, well-known contents of components of the receiving terminal 50 will be omitted.

The antenna unit 10 can receive a radio frequency (RF) signal from a nearby base station (not shown). The received radio signal can be converted into an electrical signal by an antenna. The converted electric signal includes noise corresponding thereto and can be input to the low noise amplifier 20. [ The low noise amplifier 20 amplifies the input electrical signal, and the mixer 30 downconverts the amplified signal. And then amplified or filtered by the transimpedance amplification part filter 40 or the like.

However, since the final output signal of the receiving terminal 50 includes noise, an attenuation scheme thereof has been discussed.

2 is an example of a circuit diagram relating to a conventional low-noise amplifying unit 20. As shown in Fig. The low-noise amplifier 20 may be constituted by a circuit as shown in Fig. Therefore, conventionally, by adjusting the resistance value of the first resistor R ₁ connected to the drain side of the first FET M ₁ and the resistance value of the second resistor R ₂ connected to the drain side of the second FET M ₂ , . Specifically, the noise factor (NF) of the low-noise amplifier 20 can be expressed by the following equation (1).

[Equation 1]

Therefore, conventionally, the noise is attenuated by adjusting the resistance value of the first resistor R ₁ and the resistance value of the second resistor R ₂ so that F in Equation ( ₁ ) is minimized.

Meanwhile, in addition to the noise attenuation in the low-noise amplifier 20, the noise attenuation in the trans-impedance amplifier 40 is also achieved.

3 is an example of a block diagram relating to the conventional mixer unit 30 and the transimpedance amplification unit 40. FIG. The mixer unit 30 and the transimpedance amplification unit 40 may be configured as shown in FIG. Therefore, conventionally, it is possible to reduce the noise by adjusting the resistance value of the first feedback resistor? R _F1 for the first amplifier 41 and the resistance value of the second feedback resistor R _F2 for the second amplifier 42 there was. Specifically, the noise factor of the trans-impedance amplifier 40 can be expressed by the following equation (2).

&Quot; (2) "

Accordingly, in the prior art, the noise is attenuated by adjusting the resistance value of the first feedback resistor DELTA R _F1 and the resistance value of the first feedback resistor R _F2 such that F in Equation (2) is minimized.

The resistance value of the first resistor R ₁ and the resistance value of the second resistor R ₂ of the low noise amplifier 20 can be adjusted or the resistance value of the second feedback resistor R ₂ of the trans- _F1 of the second amplifier 42 and the resistance value of the second feedback resistor R _F2 to the second amplifier 42 are removed.

However, according to this conventional technology, a large number of resistive elements and switches are required, so that not only the size of the receiving end increases but also a problem of cost increase due to necessary parts may occur.

Also, since the transimpedance amplifier 40 includes at least two amplifiers 41 and 42, there is a problem that the power consumption and thus the thermal noise for each of the amplifiers 41 and 42 is increased .

It is an object of the present invention to provide a radio receiving apparatus for attenuating noise by adjusting a bias voltage for a mixer.

In order to achieve the above object, a radio receiver according to an embodiment of the present invention includes a low-noise amplifier including a first FET of a common gate and a second FET of a common source, a first mixer connected to a drain of the first FET, And a second mixer connected to the drain of the second FET, and a trans-impedance amplifier for receiving an output signal of the first mixer and an output signal of the second mixer, The noise outputted from the transimpedance amplifier can be reduced by adjusting at least one of the bias voltage of the first mixer and the bias voltage of the second mixer so that the amplitudes of the noise outputted to the first mixer and the noise outputted to the second mixer are the same have.

The transimpedance amplifier may be a differential amplifier that receives the output signal of the first mixer and the output signal of the second mixer.

Further, each of the first mixer and the second mixer can input a signal whose phase is opposite to that of the other and noise whose phase is the same as that of each other.

Also, the low-noise amplifier section includes a first resistor connected to the drain of the first FET and a second resistor connected to the drain of the second FET, and adjusting at least one of the resistance value of the first resistor and the resistance value of the second resistor, The noise output from the amplifying unit can be reduced.

Further, the transimpedance amplifier section includes a feedback resistor, and the gain of the feedback resistor can be adjusted by adjusting the resistance value of the feedback resistor.

According to at least one of the embodiments of the present invention, since the number of necessary resistance elements is reduced, not only the size of the receiving end but also the cost can be reduced.

Also, since the transimpedance amplifier section can include only one amplifier, the power consumption for the amplifier and hence the thermal noise can be reduced.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1 is an example of a block diagram relating to a conventional receiving end,
2 is an example of a circuit diagram relating to a conventional low-noise amplifier,
3 is an example of a block diagram relating to a conventional mixer section and a transimpedance amplifier section,
4 is a block diagram of a receiving end according to an embodiment of the present invention,
5 is a diagram illustrating an example of a mixer according to an embodiment of the present invention,
6 to 8 are graphs for explaining a process of generating an output signal according to an embodiment of the present invention,
9 is a diagram illustrating another example of a receiving end according to an embodiment of the present invention,
10 is a block diagram illustrating another example of a receiving end according to an embodiment of the present invention,
11 is a view showing another example of a receiving end according to an embodiment of the present invention,
12 is a diagram illustrating an example of a characteristic of an output signal according to an embodiment of the present invention,
13 is a block diagram of a mobile terminal to which a receiving end is applied according to various embodiments of the present invention.

Hereinafter, a backlight unit and a display device according to the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, the terms first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms may only be used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The term " and / or " may include any combination of a plurality of related listed items or any of a plurality of related listed items.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between Can be understood. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

It is to be understood that the terms "comprises" or "having" in this application are intended to designate the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are, unless expressly defined in the present application, interpreted in an ideal or overly formal sense .

In addition, the following embodiments are provided to explain more fully to the average person skilled in the art. The shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

4 is an exemplary block diagram of a receiver according to an embodiment of the present invention. In FIG. 4, the low-noise amplifier 120 is shown as a single block. However, since the low-noise amplifier 120 is the same as the conventional low-noise amplifier 20, the low-noise amplifier 120 may be the same as that shown in FIG. In addition, a description that has already been widely known about contents of the following constituent elements will be omitted.

The low-noise amplifier 120 is a component for amplifying the signal received by the antenna unit 110. The low noise amplifier 120 may include a first FET (Field Effect Transistor) M 1 of a common gate (CG) and a second FET M 2 of a common source (CS). Although the FET is shown in Fig. 4, this is only an example.

The low-noise amplifier 120 may include a first resistor R ₁ and a second resistor R ₂ . The first resistor R ₁ may be connected to the drain of the first FET M 1 and the second resistor R ₂ may be connected to the drain of the second FET M 2.

Meanwhile, a block diagram of the mixer unit 130 according to an embodiment of the present invention is shown in FIG. The mixer 130 is a component for frequency downconverting the radio signal amplified and output from the low noise amplifier 120 into a baseband signal.

The mixer unit 130 may include a first mixer 131 and a second mixer 132. The first mixer 131 may be connected to the drain of the first FET M1 and the second mixer 132 may be connected to the drain of the second FET M2. The first bias voltage V _LO1 may be applied to the first mixer 131 and the second bias voltage V _LO2 may be applied to the second mixer 132.

In this case, the first bias voltage V _LO1 or the second bias voltage V _LO2 can be adjusted. Concretely, the first bias voltage V _LO1 and the second bias voltage V (V _LO1 ) are set so that the amplitudes of the first output noise outputted from the first mixer 131 and the second output noise outputted from the second mixer 132 are the same, _LO2 ) may be adjusted.

Here, the first input signal input to the first mixer 131 and the second input signal input to the second mixer 132 may have different phases. The first input signal and the second input signal may include a first input noise and a second input noise, respectively. The first input noise and the second input noise may have different amplitudes, and the phases may be the same. Therefore, in order to cancel the first input noise and the second input noise, at least one of the first bias voltage V _LO1 and the second bias voltage V _LO2 needs to be adjusted so as to be output with the same amplitude. This will be described in detail in FIGS. 5 to 8. FIG.

Meanwhile, a block diagram of the trans-impedance amplifier 140 according to an embodiment of the present invention is shown in FIG. The transimpedance amplification unit 140 may convert the baseband signal output from the mixer unit 130, that is, the baseband current signal, into a voltage signal.

The trans-impedance amplifier 140 may include a subtractor 142. The subtractor 142 may be a component for subtracting the first output signal from the first mixer 131 and the second signal from the second mixer 132. [ Therefore, the subtractor 142 is connected to the output terminal of the first mixer 131 and the output terminal of the second mixer 132, and outputs one signal corresponding to the difference between the first output signal and the second output signal to the amplifier 141, As shown in FIG.

As described above, the first input noise and the second input noise have the same phase, and the amplitudes can be made equal by adjusting at least one of the first bias voltage V _LO1 and the second bias voltage V _LO2 . Accordingly, the first mixer 131 and the second mixer 132 can output the first output noise and the second output noise having the same phase and amplitude, respectively. The subtractor 142 can attenuate the total noise by subtracting the second output noise outputted from the second mixer 132 from the first output noise outputted from the first mixer 131. [

In addition, the trans-impedance amplifier 140 may include one amplifier 141 and a corresponding feedback resistor R _F. The first input signal input to the first mixer 131 and the second input signal input to the second mixer 132 include the first input noise and the second input noise, respectively, as described above. Also, the subtracter 142 subtracts the first output noise and the second output noise, thereby reducing the total noise as described above.

Therefore, the transimpedance amplification unit 140 can amplify a signal obtained by combining the first output signal and the second output signal. Here, the synthesis may mean that the phase of any one of the two signals is reversed and added. This will be described in detail in FIG. 6 to FIG.

As described above, the conventional receiving end 50 adjusts the resistance value of the resistance of the low-noise amplifier 20 or the resistance value of the feedback resistors? R _F1 and R _F2 of the trans-impedance amplifier 40 for noise attenuation The receiver 100 according to an embodiment of the present invention adjusts the bias voltages V _LO1 and V _LO2 of the mixer.

Therefore, according to the embodiment of the present invention, noise can be attenuated by a relatively simple and low-cost method.

The transimpedance amplifier section 40 included in the conventional receiving stage 50 includes two amplifiers 41 and 42 and respective feedback resistors? R _F1 and R _F2 , whereas in the embodiment of the present invention The receiving end 100 may include one amplifier 141 and a corresponding feedback resistor R _F.

Therefore, according to the embodiment of the present invention, the number of resistance elements required for the transimpedance amplifier 140 is reduced, so that the size or volume of the receiving end 100 is reduced and the manufacturing cost is reduced . In addition, since the number of amplifiers is reduced, the total current flowing through the amplifier is reduced, so that the power consumption can be reduced and the resulting thermal noise can be reduced.

Such an effect of the present invention is shown in Table 1 in which simulation results are compared. Here, type 1 means the conventional receiving terminal 50 according to FIG. 3, and type 2 means the receiving terminal 100 according to the present invention shown in FIG. The noise factor and gain will be described in detail in Fig.

[Table 1]

On the other hand, the mixers 131 and 132 described above can be modeled with a switch, and Fig. 5 shows such modeling. 5 is an example of a diagram for explaining mixers 131 and 132 according to an embodiment of the present invention.

Referring to FIG. 5, one mixer 131 and 132 according to an embodiment of the present invention may be modeled as a single switch. An RF signal may be input to the source terminal of the switch shown in FIG. 5, and an IF (Intermediate Frequency) signal may be output to the drain terminal. Here, the bias voltage V _LO is applied to the gate terminal of the switch as described above.

When this bias voltage V _LO is adjusted, the turn on resistance value of the switch can be changed. Therefore, the gain of the IF signal output from the switch can be changed as the bias voltage V _LO is adjusted.

The first bias voltage V _LO1 of the first mixer 131 and the second bias voltage V _LO2 of the second mixer 132 are set so that the amplitudes of the first output noise and the second output noise become equal to each other Can be adjusted. In addition, the first bias voltage V _LO1 and the second bias voltage V _LO2 may be adjusted simultaneously so that the amplitudes of the first output noise and the second output noise become equal to each other.

4 to 5, a method of attenuating the total noise by adjusting the bias voltage to at least one of the mixers 131 and 132 has been described. However, the present invention is not limited to this, It may be used at the same time. In other words, the bias voltage for at least one of the mixers 131 and 132 is adjusted and the resistance value of the first resistor R ₁ and the resistance value of the second resistor R 2 included in the low- The total noise may be attenuated by adjusting at least one or by adjusting the resistance value of the feedback resistor R _F included in the transimpedance amplification part 140. Since the conventional method for noise attenuation is the same as that described with reference to FIG. 1 to FIG. 3, redundant description will be omitted.

Meanwhile, the first input signal input to the first mixer 131 and the second input signal input to the second mixer 132 include the first input noise and the second input noise, respectively, as described above. Hereinafter, a process in which the total noise is attenuated by the mixers 131 and 132 and the subtractor 142 will be described.

6 to 8 are graphs illustrating a process of generating an output signal according to an exemplary embodiment of the present invention.

FIG. 6 is a graph showing a first input signal and a first input noise thereof, and FIG. 7 is a graph illustrating a second input signal and a second input noise thereof. Figure 8 shows that the first input signal and the second input signal are adjusted by at least one of a first bias voltage ( _VLO1 ) and a second bias voltage ( _VLO2 ) such that each output is synthesized by a subtractor (142) And the results are shown in a graph.

Referring to Figures 6 (a) and 7 (a), the first input signal and the second input signal may be opposite in phase. In this figure, the case where the two amplitudes are different is exemplified, but they may be the same. 6 (b) and 7 (b), the first input noise and the second input noise may have the same phase. In this figure, the case where the two amplitudes are different is exemplified, but they may be the same.

At least one of the first bias voltage V _LO1 and the second bias voltage V _LO2 may be adjusted so that the amplitudes of the first output noise and the second output noise become equal to each other. Thus, the first bias voltage V _LO1 can be adjusted so that the amplitude of the first output noise shown in Fig. 6 (a) is output to twice the amplitude of the first input noise. Or the second bias voltage V _LO2 may be adjusted so that the amplitude of the second output noise shown in Fig. 6 (b) is output as a half of the second input noise amplitude.

As a result, the first output noise and the second output noise can have the same phase and amplitude. Therefore, when the second output noise is subtracted from the first output noise by the subtractor 142, the total noise can be attenuated as shown in FIG. 8 (c).

Meanwhile, when at least one of the first bias voltage V _LO1 and the second bias voltage V _LO2 is adjusted in the above-described manner, the first output signal and the second output signal may also be changed. In the above example, if only the first bias voltage V _LO1 is adjusted, the amplitude of the first output signal may be twice the amplitude of the first input signal. Therefore, as a result of subtraction by the subtractor 142, an output signal as shown in FIG. 8A can be generated. Likewise, if only the second bias voltage V _LO2 is adjusted, the amplitude of the second output signal may be half the amplitude of the second input signal. Therefore, as a result of subtraction by the subtractor 142, an output signal as shown in FIG. 8A can be generated.

On the other hand, the specific numerical values and waveforms shown in Figs. 6 to 8 are merely illustrative, and thus the present invention is not limited thereto.

Although the transimpedance amplifier 140 including the amplifier 141 and the subtractor 142 has been described above, the present invention is not limited thereto. Therefore, as shown in FIG. 9, the trans-impedance amplifier 140 may include one differential amplifier 141.

9 is another example of a receiving end according to an embodiment of the present invention. Hereinafter, the description of the parts overlapping with the above description will be omitted.

Specifically, the trans-impedance amplifier 240 can receive the first output signal from the first mixer 231 and the second output signal from the second mixer 232, respectively. Wherein the first output signal and the second output signal may be different in phase. Therefore, the transimpedance amplifier 240 may be implemented as a single differential amplifier 241, and the differential amplifier 241 may respectively receive a first output signal and a second output signal having different phases.

In the above description, one transimpedance amplifier 140 and 240 are included in one receiver 100 and 200, but the present invention is not limited thereto and may be configured as shown in FIG. 10 is another example of a receiving end according to an embodiment of the present invention.

Therefore, the plurality of trans-impedance amplifiers 340-1, 340-2, ... can be connected to one mixer 330. [ That is, the output terminal of the mixer unit 330 may be connected to the input terminals of the plurality of trans-impedance amplifiers 340-1, 340-2,. Therefore, the plurality of trans-impedance amplifiers 340-1, 340-2, ... can output respective signals.

In the above description, one mixer unit 130 and 230 and one trans-impedance amplifier unit 140 are included in one receiver 100 and 200. However, the present invention is not limited thereto, As shown in FIG. 11 is yet another example of a receiving end according to an embodiment of the present invention.

Accordingly, the plurality of mixer units 430-1, 430-2,... Can be connected to one low-noise amplifier unit 420. That is, the output terminal of the low noise amplifier 420 may be connected to the input terminals of the plurality of mixer units 430-1, 430-2, ..., respectively. The plurality of transimpedance amplification units 440-1, 440-2, ... may be connected to the respective mixer units 430-1, 430-2, .... Therefore, the plurality of trans-impedance amplifying units 440-1, 440-2, ... can output respective signals.

12 is an example of a diagram for explaining characteristics of an output signal according to an embodiment of the present invention.

The noise factor of the receiver 100, 200 according to an exemplary embodiment of the present invention may be expressed by Equation 3 below.

&Quot; (3) "

3, the noise factor of the receiving terminal 50 according to the related art can be expressed as Equation (2) below.

&Quot; (2) "

Comparing the above formulas, it can be seen that the noise factor of the receiving end 100, 200 according to an embodiment of the present invention is reduced as compared with the noise factor of the receiving end 50 according to the related art. The characteristics of such a noise factor can be confirmed as a simulation result as shown in Fig. Here, type 1 means a conventional receiving terminal 50 according to FIG. 3, and type 2 means receiving terminals 100 and 200 according to the present invention shown in FIG.

Meanwhile, the trans-impedance amplifiers 140 and 240 can adjust the gain by adjusting the resistance value of the feedback resistor R _F. Therefore, although the gain of the receiving terminals 100 and 200 according to the present invention is shown in FIG. 12 as being reduced compared to the prior art, the present invention is not limited thereto, and the gain may be increased.

FIG. 13 is an example of a block diagram of a mobile terminal 600 to which receiving terminals 100, 200, 300, and 400 according to various embodiments of the present invention are applied. 13, the mobile terminal 600 includes a wireless communication unit 610, an input unit 620, a sensing unit 640, an output unit 650, an interface unit 660, a memory 670, a controller 680, And a power supply unit 690 and the like. The components shown in FIG. 13 are not essential for implementing a mobile terminal, so that the mobile terminal described herein may have more or fewer components than the components listed above.

The wireless communication unit 610 may be connected between the mobile terminal 600 and the wireless communication system or between the mobile terminal 600 and another mobile terminal 600 or between the mobile terminal 600 and the external server, And may include one or more modules to enable communication. The wireless communication unit 610 may include one or more modules for connecting the mobile terminal 600 to one or more networks. The wireless communication unit 610 may include a receiving terminal 100, 200, 300, or 400 according to various embodiments of the present invention.

The wireless communication unit 610 may include at least one of a broadcast receiving module 611, a mobile communication module 612, a wireless internet module 613, a short range communication module 614, and a location information module 615.

The input unit 620 includes a camera 621 or an image input unit for inputting an image signal, a microphone 622 or an audio input unit for inputting an audio signal, a user input unit 623 for receiving information from a user, A touch key, a mechanical key, and the like). The voice data or image data collected by the input unit 620 may be analyzed and processed by a user's control command.

The sensing unit 640 may include at least one sensor for sensing at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information. For example, the sensing unit 640 may include a proximity sensor 641, an illumination sensor 642, a touch sensor, an acceleration sensor, a magnetic sensor, A G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor, a finger scan sensor, an ultrasonic sensor, A microphone 622, a battery gauge, an environmental sensor (e.g., a barometer, a hygrometer, a thermometer, a radiation detection sensor, a heat sensor, A sensor, a gas sensor, etc.), a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in the present specification can combine and utilize information sensed by at least two of the sensors.

The output unit 650 includes at least one of a display unit 651, an acoustic output unit 652, a hap hop module 653, and a light output unit 654 for generating output related to visual, auditory, can do. The display unit 651 may have a mutual layer structure with the touch sensor or may be integrally formed to realize a touch screen. The touch screen functions as a user input unit 623 that provides an input interface between the mobile terminal 600 and a user and can provide an output interface between the mobile terminal 600 and the user.

The interface unit 660 serves as a path to various kinds of external devices connected to the mobile terminal 600. The interface unit 660 includes a port for connecting a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a video input / output port, an audio input / output port, a video input / output port, and an earphone port. In the mobile terminal 600, corresponding to the connection of the external device to the interface unit 660, it is possible to perform appropriate control related to the connected external device.

Also, the memory 670 stores data supporting various functions of the mobile terminal 600. The memory 670 may store a plurality of application programs or applications that are driven by the mobile terminal 600, data for operation of the mobile terminal 600, and commands. At least some of these applications may be downloaded from an external server via wireless communication. Also, at least some of these application programs may exist on the mobile terminal 600 from the time of departure for the basic functions of the mobile terminal 600 (e.g., phone call incoming, outgoing function, message reception, origination function). Meanwhile, the application program may be stored in the memory 670, installed on the mobile terminal 600, and may be operated by the control unit 680 to perform the operation (or function) of the mobile terminal.

The control unit 680 typically controls the overall operation of the mobile terminal 600, in addition to operations associated with application programs. The control unit 680 may process or process signals, data, information, and the like input or output through the components described above or may drive an application program stored in the memory 670 to provide or process appropriate information or functions to the user.

In addition, the controller 680 may control at least some of the components illustrated in FIG. 1A to drive an application program stored in the memory 670. Further, the control unit 680 may operate at least two or more of the components included in the mobile terminal 600 in combination with each other for driving an application program.

Under the control of the controller 680, the power supply unit 690 supplies power to the components included in the mobile terminal 600 by receiving external power and internal power. The power supply unit 690 may include a battery, and the battery may be an embedded battery or a replaceable battery.

At least some of the components may operate in cooperation with each other to implement a method of operation, control, or control of the mobile terminal according to various embodiments described below. The method of operation, control, or control of the mobile terminal may also be implemented on the mobile terminal by driving at least one application program stored in memory 670.

Hereinafter, the various components of the mobile terminal 600 will be described in detail with reference to FIG. 1A.

First, referring to the wireless communication unit 610, the broadcast receiving module 611 of the wireless communication unit 610 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. More than one broadcast receiving module may be provided to the mobile terminal 600 for simultaneous broadcast reception or broadcast channel switching for at least two broadcast channels.

The mobile communication module 612 may be a mobile communication module such as a mobile communication module, a mobile communication module, a mobile communication module, a mobile communication module, (Wideband CDMA), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only) Long Term Evolution-Advanced), and the like, to a base station, an external terminal, and a server.

The wireless signal may include various types of data depending on a voice call signal, a video call signal, or a text / multimedia message transmission / reception.

The wireless Internet module 613 refers to a module for wireless Internet access, and may be embedded in the mobile terminal 600 or externally. The wireless Internet module 613 is configured to transmit and receive wireless signals in a communication network according to wireless Internet technologies.

Wireless Internet technologies include, for example, WLAN (Wireless LAN), Wi-Fi (Wireless Fidelity), Wi-Fi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), WiBro for example, a wireless Internet module 613, a wireless LAN module 613, a wireless LAN module 613, a wireless LAN module 613, Transmits and receives data according to at least one wireless Internet technology, including Internet technologies not listed above.

The wireless Internet module 613, which performs wireless Internet access through a mobile communication network, is a wireless Internet service provider in terms of wireless Internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE, LTE- It may be understood as a kind of mobile communication module 612. [

The short-range communication module 614 is for short-range communication. The short-range communication module 614 is a module for short-range communication, such as Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB) (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology. The short-range communication module 614 is connected to the mobile terminal 600 and the wireless communication system through the wireless area networks, between the mobile terminal 600 and another mobile terminal 600, And can support wireless communication between the network where the other mobile terminal 600 (or the external server) is located. The short-range wireless communication network may be a short-range wireless personal area network.

Herein, another mobile terminal 600 includes a wearable device (e.g., a smartwatch, a smart smart, etc.) capable of interchanging data with the mobile terminal 600 according to the present invention glass, HMD (head mounted display)). The short range communication module 614 can detect (or recognize) a wearable device capable of communicating with the mobile terminal 600 around the mobile terminal 600. [ Further, the control unit 680 may transmit at least part of the data processed by the mobile terminal 600 to the short distance communication module 614 when the detected wearable device is an authorized device to communicate with the mobile terminal 600 according to the present invention. To the wearable device. Accordingly, the user of the wearable device can use the data processed by the mobile terminal 600 through the wearable device. For example, the user can make a phone call through the wearable device when a phone call is received in the mobile terminal 600, or transmit a message received through the wearable device when the message is received in the mobile terminal 600 It is possible to confirm.

The position information module 615 is a module for obtaining the position (or the current position) of the mobile terminal, and a representative example thereof is a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, when the mobile terminal utilizes the GPS module, it can acquire the position of the mobile terminal by using a signal transmitted from the GPS satellite. As another example, when the mobile terminal utilizes the Wi-Fi module, the position of the mobile terminal can be acquired based on information of a wireless access point (AP) transmitting or receiving a wireless signal with the Wi-Fi module. The location information module 615 may perform substitute or additionally functions of other modules of the wireless communication unit 610 to obtain data on the location of the mobile terminal as needed. The location information module 615 is a module used to obtain the location (or current location) of the mobile terminal, and is not limited to a module that directly calculates or obtains the location of the mobile terminal.

Next, the input unit 620 is for inputting image information (or signal), audio information (or signal), data, or information input from a user. For inputting image information, Or a plurality of cameras 621. The camera 621 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 651 or stored in the memory 670. [ The plurality of cameras 621 included in the mobile terminal 600 may be arranged to have a matrix structure and the mobile terminal 600 may have various angles or foci through the camera 621 having a matrix structure. A plurality of pieces of image information can be input. The plurality of cameras 621 may be arranged in a stereo structure to obtain a left image and a right image for realizing the stereoscopic image.

The microphone 622 processes the external acoustic signal into electrical voice data. The processed voice data can be utilized variously according to a function (or a running application program) being performed in the mobile terminal 600. [ Meanwhile, various noise elimination algorithms may be implemented in the microphone 622 to eliminate noise generated in receiving an external sound signal.

The user input unit 623 is used to receive information from the user. When information is inputted through the user input unit 623, the control unit 680 can control the operation of the mobile terminal 600 to correspond to the input information . The user input unit 623 may include a mechanical input means (or a mechanical key such as a button located on the front, rear or side of the mobile terminal 600, a dome switch, a jog wheel, Etc.) and touch-type input means. For example, the touch-type input means may comprise a virtual key, a soft key, or a visual key displayed on the touch screen through a software process, or may be disposed on a portion other than the touch screen And a touch key. On the other hand, the virtual key or the visual key can be displayed on the touch screen with various forms, for example, graphic, text, icon, video, or a combination thereof Lt; / RTI >

Meanwhile, the sensing unit 640 senses at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information, and generates a corresponding sensing signal. The control unit 680 may control the driving or the operation of the mobile terminal 600 or may perform data processing, function or operation related to the application program installed in the mobile terminal 600 based on the sensing signal. Representative sensors among various sensors that may be included in the sensing unit 640 will be described in more detail.

First, the proximity sensor 641 refers to a sensor that detects the presence of an object approaching a predetermined detection surface or an object existing in the vicinity of the detection surface without mechanical contact by using electromagnetic force or infrared rays. The proximity sensor 641 may be disposed in the vicinity of the inner area of the mobile terminal or the touch screen, which is covered by the touch screen.

Examples of the proximity sensor 641 include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. In the case where the touch screen is electrostatic, the proximity sensor 641 can be configured to detect the proximity of the object with the change of the electric field along the proximity of the object having conductivity. In this case, the touch screen (or touch sensor) itself may be classified as a proximity sensor.

For the sake of convenience of explanation, the act of recognizing that an object is located on the touch screen while the object is not in contact with the touch screen is referred to as "proximity touch" Quot; contact touch ". The position at which an object is touched on the touch screen means a position at which the object corresponds vertically to the touch screen when the object is touched. The proximity sensor 641 can sense a proximity touch and a proximity touch pattern (e.g., proximity touch distance, proximity touch direction, proximity touch speed, proximity touch time, proximity touch position, proximity touch movement state, and the like). Meanwhile, the control unit 680 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern sensed through the proximity sensor 641 as described above, and further provides visual information corresponding to the processed data to the touch screen Can be output on the display device. Further, the control unit 680 may control the mobile terminal 600 such that different operations or data (or information) are processed according to whether a touch to the same point on the touch screen is a proximity touch or a contact touch.

(Or touch input) applied to the touch screen (or the display unit 651) by using at least one of various touch methods such as a resistance film type, a capacitive type, an infrared type, an ultrasonic type, Detection.

For example, the touch sensor may be configured to convert a change in a pressure applied to a specific portion of the touch screen or a capacitance generated in a specific portion into an electrical input signal. The touch sensor may be configured to detect a position, an area, a pressure at the time of touch, a capacitance at the time of touch, and the like where a touch object touching the touch screen is touched on the touch sensor. Here, the touch object may be a finger, a touch pen, a stylus pen, a pointer, or the like as an object to which a touch is applied to the touch sensor.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the control unit 680. Thus, the control unit 680 can know which area of the display unit 651 is touched or the like. Here, the touch controller may be a separate component from the controller 680, and may be the controller 680 itself.

On the other hand, the control unit 680 may perform different controls or perform the same control according to the type of the touch object touching the touch screen (or a touch key provided on the touch screen). Whether to perform different controls or to perform the same control according to the type of the touch object may be determined according to the current state of the mobile terminal 600 or an application program being executed.

On the other hand, the touch sensors and proximity sensors described above can be used independently or in combination to provide short (touch), long (touch), multi touch, drag touch Touches such as flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, Sensing can be performed.

The ultrasonic sensor can recognize the position information of the object to be sensed by using ultrasonic waves. On the other hand, the controller 680 can calculate the position of the wave generating source through the information sensed by the optical sensor and the plurality of ultrasonic sensors. The position of the wave source can be calculated by using the fact that the light is much faster than the ultrasonic wave, that is, the time when the light reaches the optical sensor is much faster than the time when the ultrasonic wave reaches the ultrasonic sensor. More specifically, the position of the wave generating source can be calculated using the time difference with the time when the ultrasonic wave reaches the reference signal.

The camera 621 includes at least one of a camera sensor (for example, a CCD or a CMOS), a photo sensor (or an image sensor), and a laser sensor.

The camera 621 and the laser sensor can be combined with each other to sense the touch of the sensing object with respect to the three-dimensional stereoscopic image. The photosensor can be laminated to the display element, which is adapted to scan the movement of the object to be detected proximate to the touch screen. More specifically, a photosensor mounts a photo diode and a transistor (TR) in a row / column and scans the contents placed on the photosensor using an electrical signal that changes according to the amount of light applied to the photo diode. That is, the photo sensor performs the coordinate calculation of the object to be sensed according to the amount of change of light, and the position information of the object to be sensed can be obtained through the calculation.

The display unit 651 displays (outputs) information to be processed by the mobile terminal 600. For example, the display unit 651 may display execution screen information of an application program driven by the mobile terminal 600 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information.

Also, the display unit 651 may be configured as a stereoscopic display unit for displaying a stereoscopic image.

In the stereoscopic display unit, a three-dimensional display system such as a stereoscopic system (glasses system), an autostereoscopic system (no-glasses system), a projection system (holographic system) can be applied.

The audio output unit 652 may output audio data received from the wireless communication unit 610 or stored in the memory 670 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output unit 652 also outputs sound signals related to the functions performed by the mobile terminal 600 (for example, call signal reception sound, message reception sound, and the like). The sound output unit 652 may include a receiver, a speaker, a buzzer, and the like.

The haptic module 653 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 653 may be vibration. The intensity and pattern of the vibration generated in the haptic module 653 can be controlled by the user's selection or the setting of the control unit. For example, the haptic module 653 may synthesize and output different vibrations or output them sequentially.

In addition to vibration, the haptic module 653 may be configured to perform various functions such as a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 653 can not only transmit the tactile effect through the direct contact but also can be implemented so that the user can feel the tactile effect through the muscles of the finger or arm. More than two haptic modules 653 may be provided according to the configuration of the mobile terminal 600.

The light output unit 654 outputs a signal for notifying the occurrence of an event using the light of the light source of the mobile terminal 600. Examples of events that occur in the mobile terminal 600 may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like.

The signal output by the optical output unit 654 is implemented as the mobile terminal emits light of a single color or a plurality of colors to the front or rear surface. The signal output may be terminated by the mobile terminal detecting the event confirmation of the user.

The interface unit 660 serves as a path to all the external devices connected to the mobile terminal 600. The interface unit 660 receives data from an external device or supplies power to each component in the mobile terminal 600 or allows data in the mobile terminal 600 to be transmitted to an external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module an audio I / O port, a video I / O port, an earphone port, and the like may be included in the interface unit 660.

Meanwhile, the identification module is a chip for storing various information for authenticating the usage right of the mobile terminal 600 and includes a user identification module (UIM), a subscriber identity module (SIM) a universal subscriber identity module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 600 through the interface unit 660.

The interface unit 660 may be a path through which power from the cradle is supplied to the mobile terminal 600 when the mobile terminal 600 is connected to an external cradle or various command signals input from the cradle by the user are moved And may be a passage to be transmitted to the terminal 600. Various command signals or power from the cradle can be operated as a signal for recognizing that the mobile terminal 600 is correctly mounted on the cradle.

The memory 670 may store a program for the operation of the controller 680 and temporarily store input / output data (e.g., a phonebook, a message, a still image, a moving picture, etc.). The memory 670 may store data related to vibrations and sounds of various patterns that are output upon touch input on the touch screen.

The memory 670 may be a flash memory type, a hard disk type, a solid state disk type, an SDD type (Silicon Disk Drive type), a multimedia card micro type ), Card type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read memory, a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and / or an optical disk. The mobile terminal 600 may operate in association with a web storage that performs storage functions of the memory 670 on the Internet.

Meanwhile, as described above, the control unit 680 controls an operation related to an application program and an overall operation of the mobile terminal 600. [ For example, the control unit 680 may execute or release a lock state for restricting input of a user's control command to applications if the state of the mobile terminal satisfies a set condition.

Further, the control unit 680 may perform control and processing related to voice communication, data communication, video call, or the like, or may perform pattern recognition processing capable of recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively have. Further, the control unit 680 may control any one or a plurality of the above-described components in order to implement various embodiments described below on the mobile terminal 600 according to the present invention.

The power supply unit 690 receives external power and internal power under the control of the controller 680 and supplies power necessary for operation of the respective components. The power supply unit 690 includes a battery, the battery may be an internal battery configured to be chargeable, and may be detachably coupled to the terminal body for charging or the like.

Also, the power supply unit 690 may include a connection port, and the connection port may be configured as an example of an interface 660 through which an external charger for supplying power for charging the battery is electrically connected.

As another example, the power supply unit 690 may be configured to charge the battery in a wireless manner without using the connection port. In this case, the power supply unit 690 may use at least one of an inductive coupling method based on a magnetic induction phenomenon from an external wireless power transmission apparatus or a magnetic resonance coupling method based on an electromagnetic resonance phenomenon, .

In the following, the various embodiments may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

It will be understood by those skilled in the art that the technical features of the present invention described above may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It should be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, And all changes or modifications derived from equivalents thereof should be construed as being included within the scope of the present invention.

50, 100, 200, 300, 400: Receiver (Recerver)
20, 120, 220, 320, 420: a low-
30, 130, 230, 330, 430: Mixer unit
40, 140, 240, 340, 440: a trans-

Claims (5)

A low noise amplifier including a first FET of a common gate and a second FET of a common source;
A mixer including a first mixer connected to the drain of the first FET and a second mixer connected to the drain of the second FET; And
And a trans-impedance amplifier for receiving an output signal of the first mixer and an output signal of the second mixer,
The mixer includes:
Adjusting at least one of a bias voltage of the first mixer and a bias voltage of the second mixer so that the amplitudes of the noise outputted to the first mixer and the noise outputted to the second mixer are the same, Thereby reducing noise. The method according to claim 1,
Wherein the trans-
Wherein the first amplifier is a differential amplifier that receives as input the output signal of the first mixer and the output signal of the second mixer. The method according to claim 1,
Wherein each of the first mixer and the second mixer includes:
And inputs signals having opposite phases and phases having the same phase to each other. The method according to claim 1,
Wherein the low-
A first resistor connected to a drain of the first FET and a second resistor connected to a drain of the second FET,
And adjusting at least one of a resistance value of the first resistor and a resistance value of the second resistor to reduce the noise output from the preamplifier. The method according to claim 1,
Wherein the trans-
A feedback resistor,
And adjusts the gain of the feedback resistor by adjusting the resistance value of the feedback resistor.

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