KR101875688B1 - Baseband Receiver for Millimeter Wave Systems - Google Patents

Abstract

A first low pass section for passing a signal of a predetermined frequency or less in an input RF signal and an output signal of a first low pass section through an eleventh input switching section to adjust the size of a signal below a predetermined frequency An 11th feedback section for passing a signal passed through the 11th output switching section to an input terminal of the first low pass section, a first voltage gain controller for adjusting a voltage gain of a signal transmitted from the first low pass section, 1 voltage gain control unit through a twelfth input switching unit to control the magnitude of a signal of a predetermined frequency or less and to pass the signal through the twelfth output switching unit to the input terminal of the first voltage gain control unit The twelfth feedback section, and the first voltage gain control section, A second low pass section for passing the output signal of the second low pass section through a twenty first input switching section to regulate and pass a signal of a frequency lower than a predetermined frequency, A second voltage gain control unit for controlling a voltage gain of a signal transmitted from the second low pass unit, and an output signal of the second voltage gain control unit through a twenty-second input switching unit And a twenty-second feedback section for passing the signal through the twenty-second output switching section to the input terminal of the second voltage gain control section, and a twenty-second feedback section for receiving the twenty- to provide.

Description

Technical Field [0001] The present invention relates to a baseband receiver for a millimeter wave system,

The present invention relates to a baseband receiver for a millimeter wave system, and more particularly to a near-field radar system for receiving an RF (Radio Frequency) signal at a short distance or a long-range radar system for receiving an RF signal at a long distance To a baseband receiver for a millimeter wave system.

Generally, a radar system is divided into a near-field radar system and a long-range radar system depending on the reception distance of the RF signal.

Since the radar system attenuates the intensity of the received signal in inverse proportion to the fourth power of the reception distance of the RF signal, it is difficult to maintain a uniform signal noise ratio (SNR) when the reception distance varies widely.

Although Patent Literature 10-0979283 discloses a circuit damage prevention method for a radar receiving system by a signal of a high electric field, it is difficult for such a radar receiving system to maintain a uniform signal to noise ratio when the receiving distance varies widely.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a near-field radar system for receiving an RF (Radio Frequency) And to provide a baseband receiver for a millimeter wave system that can be employed in a radar system.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

According to an aspect of the present invention, there is provided a baseband receiver for a millimeter wave system including a first low-pass unit for passing a signal of a predetermined frequency or less from an input RF signal, Pass through the eleventh input switching unit to control the magnitude of a signal of a predetermined frequency or less and pass the signal through the eleventh output switching unit to the input terminal of the first low pass unit, A first voltage gain adjuster for adjusting a voltage gain of a signal transmitted from the first low pass section, a second voltage gain adjuster for receiving an output signal of the first voltage gain adjuster through a twelfth input switch, Through the twelfth output switching unit, the first signal, A second low pass section for passing a signal of a predetermined frequency or less from a signal transmitted from the first voltage gain regulator, and a second low pass section for passing an output signal of the second low pass section, And a second feedback unit for receiving the signal through the second switching unit and adjusting the amplitude of a signal of a predetermined frequency or less and passing the signal through an output switching unit to the input terminal of the second low- A second voltage gain adjusting unit for adjusting a voltage gain of a signal transmitted from the low pass unit; and a second voltage gain adjusting unit for receiving the output signal of the second voltage gain adjusting unit through a twenty- And the signal passed through the twenty-second output switching unit is supplied to the second voltage gain adjusting unit It includes the feedback portion 22 to pass into ryeokdan.

The baseband receiving apparatus for a millimeter wave system according to an embodiment of the present invention is characterized in that the eleventh feedback section includes the eleventh input switching section, the eleventh positive input decoupling section, the eleventh positive input band adjusting section, 11th output attenuator, 11th input attenuator, 11th input band adjuster, 11th output attenuator, and 11th output switcher.

In the baseband receiving apparatus for a millimeter wave system according to an embodiment of the present invention, the twelfth feedback section includes the twelfth input switching section, the twelfth positive input decoupling section, the twelfth positive input band adjusting section, the twelfth operational amplifier, A twelfth input attenuator, a twelfth input attenuator, a twelfth input band controller, a twelfth output decay unit, and a twelfth output switching unit.

The baseband receiver for a millimeter wave system according to an embodiment of the present invention is characterized in that the 21st feedback section includes the 21st input switching section, the 21st positive input attenuator, the 21st positive input band adjuster, the 21st operational amplifier, 21 output attenuator, a 21st negative input attenuator, a 21st negative input band adjuster, a 21st negative output attenuator, and a 21st output switching unit.

The baseband receiving apparatus for a millimeter wave system according to an embodiment of the present invention is characterized in that the twenty-second feedback section includes the twenty-second input switching section, the twenty-second positive input decoupling section, the twenty-second positive input band adjusting section, A 22nd output attenuator, a 22nd negative input attenuator, a 22nd negative input band adjuster, a 22nd negative output attenuator, and a 22nd output switching unit.

According to another aspect of the present invention, there is provided a baseband receiver for a millimeter wave system including a first low-pass unit for passing a signal of a predetermined frequency or less from an input RF signal, Pass through the eleventh input switching unit to control the magnitude of a signal of a predetermined frequency or less and pass the signal through the eleventh output switching unit to the input terminal of the first low pass unit, A first voltage gain adjuster for adjusting a voltage gain of a signal transmitted from the first low pass section, a second voltage gain adjuster for receiving an output signal of the first voltage gain adjuster through a twelfth input switch, And passes the passed signal through the twelfth output switching part, A second low pass section for passing a signal of a predetermined frequency or less from a signal transmitted from the first voltage gain regulator, and a second low pass section for passing an output signal of the second low pass section, A twenty-first feedback unit that receives the signal through a twenty-first input switching unit to adjust the size of a signal of a predetermined frequency or less and passes the signal through an output switching unit to the input terminal of the second low- A second voltage gain adjuster for adjusting a voltage gain of a signal transmitted from the second low pass filter; a second voltage gain adjuster for receiving the output signal of the second voltage gain adjuster through a twenty- And the signal passed through the second output switching unit is passed through the second voltage gain adjusting unit A third low pass section for passing a signal of a predetermined frequency or less from a signal transmitted from the second voltage gain regulator, and a third low pass section for passing the output signal of the third low pass section to the 31st input switching section And a third feedback section for passing the signal through the third output switching section to the input terminal of the third low pass section, a third feedback section for passing the signal through the third low pass section, A third voltage gain adjuster for adjusting the voltage gain of the transmitted signal, and a third voltage gain adjuster for receiving the output signal of the third voltage gain adjuster through the 32nd input switch, To the input terminal of the third voltage gain control unit through the 32 < th > output switching unit 32 feedback sections.

In the baseband receiver for a millimeter wave system according to another embodiment of the present invention, the eleventh feedback section includes the eleventh input switching section, the eleventh positive input decoupling section, the eleventh positive input band adjusting section, the eleventh operational amplifier, 11th output attenuator, 11th input attenuator, 11th input band adjuster, 11th output attenuator, and 11th output switcher.

In the baseband receiver for a millimeter wave system according to another embodiment of the present invention, the twelfth feedback section includes the twelfth input switching section, the twelfth positive input decoupling section, the twelfth positive input band adjusting section, the twelfth operational amplifier, A twelfth input attenuator, a twelfth input attenuator, a twelfth input band controller, a twelfth output decay unit, and a twelfth output switching unit.

The baseband receiver for a millimeter wave system according to another embodiment of the present invention is characterized in that the 21st feedback section includes the 21st input switching section, the 21st positive input attenuator, the 21st positive input band adjuster, the 21st op amp, 21 output attenuator, a 21st negative input attenuator, a 21st negative input band adjuster, a 21st negative output attenuator, and a 21st output switching unit.

The baseband receiving apparatus for a millimeter wave system according to another embodiment of the present invention is characterized in that the twenty-second feedback section includes the twenty-second input switching section, the twenty-second positive input decoupling section, the twenty-second positive input band adjusting section, A 22nd output attenuator, a 22nd negative input attenuator, a 22nd negative input band adjuster, a 22nd negative output attenuator, and a 22nd output switching unit.

In the baseband receiving apparatus for a millimeter wave system according to another embodiment of the present invention, the 31st feedback section includes the 31st input switching section, the 31st positive input attenuator, the 31st positive input band adjuster, the 31st operational amplifier, A 31st sound input attenuator, a 31st sound input attenuator, a 31st sound input band adjuster, a 31st sound output attenuator, and a 31st output switching unit.

In the baseband receiver for a millimeter wave system according to another embodiment of the present invention, the 32nd feedback section includes the 32nd input switching section, the 32nd positive input attenuator, the 32nd positive input band adjuster, the 32th operational amplifier, A 32nd output attenuator, a 32nd negative input attenuator, a 32nd negative input band adjuster, a 32nd negative output attenuator, and a 32nd output switching unit.

The baseband receiver for a millimeter wave system according to embodiments of the present invention receives an RF (Radio Frequency) signal in a short distance by removing the DC offset component of the received signal while attenuating the magnitude of the received signal according to the received distance. Or a long-range radar system that receives an RF signal at a long distance.

1 is a block diagram of a baseband receiving apparatus for a millimeter wave system according to an embodiment of the present invention;
Fig. 2 is a detailed circuit diagram of the eleventh feedback section of the baseband receiving apparatus for the millimeter wave system of Fig. 1; Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram of a baseband receiver for a millimeter wave system according to an embodiment of the present invention, and FIG. 2 is a detailed circuit diagram of an eleventh feedback unit of the baseband receiver for the millimeter wave system of FIG.

A baseband receiver for a millimeter wave system according to an embodiment of the present invention includes a first low pass part LPF_1, an eleventh feedback part DCOC_11, a first voltage gain controller VGA_1, a twelfth feedback part DCOC_12 A second low pass section LPF_2, a twenty first feedback section DCOC_21, a second voltage gain control section VGA_2, a twenty second feedback section DCOC_22, a third low pass section LPF_3, A third voltage gain control unit VGA_3, and a 32nd feedback unit DCOC_32.

A low noise amplifier (LNA) amplifies an RF signal received through the antenna with the first low pass section (LPF_1), and a signal extracted in a predetermined frequency band is transmitted from the mixer (MIX). The first low pass section Passes a signal of a predetermined frequency or less from the transmitted RF signal.

The eleventh feedback unit DCOC_11 receives the output signal of the first low-pass unit LPF_1 through the eleventh input switching unit 111, adjusts the size of a signal of a predetermined frequency or less, passes the signal, Passes through the eleventh output switching unit 119 to the input terminal of the first low pass (LPF_1).

As a result, the eleventh feedback unit DCOC_11 adjusts the magnitude of the output signal of the first low-pass unit LPF_1 while removing the DC offset component from the output signal of the first low-pass unit LPF_1, (LPF_1).

Specifically, the eleventh feedback unit DCOC_11 includes an eleventh input switching unit 111, an eleventh positive input attenuator 112, an eleventh positive input band adjuster 113, an eleventh operational amplifier 115, 11 output attenuator 114, an eleventh input attenuator 116, an eleventh input band adjuster 117, an eleventh negative output attenuator 118, and an eleventh output switching unit 119 do.

The eleventh input switching unit 111 may be composed of MOS transistors QP11 and QN11 and the eleventh positive input decoupling unit 112 may be composed of a variable resistor V112. The band adjustment section 113 may be constituted by a variable capacitor C113 and the eleventh positive output attenuation section 114 may be constituted by a variable resistor V114 and the eleventh negative input attenuation section 116 may be constituted by a variable capacitor C113, The eleventh sound input band adjusting unit 117 may be composed of a variable capacitor C117 and the eleventh sound output reducing unit 118 may be composed of a variable resistor V118 The eleventh output switching unit 119 may be composed of the MOS transistors QP19 and QN19 and the eleventh operational amplifier 115 may be constituted by the operational amplifier OP11. On the other hand, the resistors R111, R112, and R113 are provided to prevent an excessive current from flowing.

The first voltage gain control unit VGA_1 adjusts the voltage gain of the signal transmitted from the first low-pass unit LPF_1.

The twelfth feedback unit DCOC_12 receives the output signal of the first voltage gain control unit VGA_1 through the twelfth input switching unit to adjust the size of the signal of less than a predetermined frequency to pass therethrough, To the input terminal of the first voltage gain controller VGA_1 through the switching unit.

As a result, the twelfth feedback unit DCOC_12 adjusts the magnitude of the output signal of the first voltage gain controller VGA_1 while removing the DC offset component from the output signal of the first voltage gain controller VGA_1, To the gain control unit (VGA_1).

Specifically, the twelfth feedback section DCOC_12 includes a twelfth input switching section, a twelfth positive input decoupling section, a twelfth positive input band control section, a twelfth operational amplifier, a twelfth positive output decay section, a twelfth negative input decay section, A twelfth sound input band adjusting unit, a twelfth sound output reducing unit, and a twelfth output switching unit.

Here, the twelfth input switching section may be composed of a mos transistor, the twelfth positive input decay section may be constituted by a variable resistor, the twelfth positive input band regulating section may be constituted by a variable capacitor, The twelfth sound input attenuator may be constituted by a variable resistor, the twelfth sound input band adjuster may be constituted by a variable capacitor, and the twelfth sound output attenuator may be constituted by a variable resistor. The twelfth output switching unit may be composed of a MOS transistor, and the twelfth operational amplifier may be composed of an operational amplifier.

The second low pass section (LPF_2) passes a signal of a predetermined frequency or lower from the signal transmitted from the first voltage gain controller (VGA_1).

The twenty-first feedback unit DCOC_21 receives the output signal of the second low-pass unit LPF_2 through the twenty-first input switching unit, adjusts the size of the signal less than a predetermined frequency and passes the signal through the twenty- To the input terminal of the second low pass section (LPF_2).

As a result, the twenty-first feedback unit DCOC_21 adjusts the magnitude of the output signal of the second low-pass unit LPF_2 while removing the DC offset component from the output signal of the second low-pass unit LPF_2, (LPF_2).

Specifically, the twenty-first feedback unit DCOC_21 includes a twenty-first input switching unit, a twenty-first positive input decoupling unit, a twenty-first positive input band adjusting unit, a twenty-first opamp, a twenty-first positive output decoupling unit, A 21st negative input band adjuster, a 21st negative output attenuator, and a 21st output switching unit.

Here, the twenty-first input switching section may be composed of a mos transistor, the twenty-first positive input decay section may be constituted by a variable resistor, the twenty-first positive input band regulating section may be constituted by a variable capacitor, The 21st negative input attenuator may be constituted by a variable resistor, the 21st negative input band adjuster may be constituted by a variable capacitor, and the 21st negative output attenuator may be constituted by a variable resistor The twenty-first output switching unit may be composed of a MOS transistor, and the twenty-first operational amplifier may be composed of an operational amplifier.

The second voltage gain controller VGA_2 adjusts the voltage gain of the signal transmitted from the second low pass (LPF_2).

The twenty second feedback unit DCOC_22 receives the output signal of the second voltage gain control unit VGA_2 through the twenty-second input switching unit to adjust the size of the signal of less than a predetermined frequency to pass therethrough, To the input terminal of the second voltage gain control unit (VGA_2) through the switching unit.

As a result, the 22nd feedback unit DCOC_22 adjusts the magnitude of the output signal of the second voltage gain controller VGA_2 while removing the DC offset component from the output signal of the second voltage gain controller VGA_2, To the gain control unit VGA_2.

Specifically, the twenty-second feedback unit DCOC_22 includes a twenty-second input switching unit, a twenty-second positive input attenuator, a twenty-second positive input band adjuster, a twenty-second operational amplifier, a twenty-second positive output attenuator, A twenty-ninth input band adjusting unit, a twenty-second negative output reducing unit, and a twenty-second output switching unit.

Here, the twenty-second input switching section may be composed of a mos transistor, the twenty-second positive input decay section may be constituted by a variable resistor, the twenty-second positive input band regulating section may be constituted by a variable capacitor, The 22nd negative input attenuator may be constituted by a variable resistor, the 22nd negative input band adjuster may be constituted by a variable capacitor, and the 22nd negative output attenuator may be constituted by a variable resistor The twenty-second output switching unit may be composed of a MOS transistor, and the twenty-second operational amplifier may be constituted by an operational amplifier.

The third low pass section (LPF_3) passes a signal of a predetermined frequency or lower from the signal transmitted from the second voltage gain control section (VGA_2).

The 31st feedback section DCOC_31 receives the output signal of the third low pass section LPF_3 through the 31st input switching section to adjust the size of a signal of a predetermined frequency or less, To the input terminal of the third low pass section (LPF_3).

As a result, the 31st feedback section DCOC_31 removes the DC offset component from the output signal of the third low pass section (LPF_3), adjusts the size of the output signal of the third low pass section (LPF_3) (LPF_3).

Specifically, the 31st feedback section DCOC_31 includes a 31st input switching section, a 31st positive input attenuator, a 31st positive input band adjuster, a 31st op amp, a 31st positive output attenuator, a 31st negative input attenuator, A 31st sound input band adjusting unit, a 31st sound output attenuating unit, and a 31st output switching unit.

Here, the 31st input switching section may be composed of a mos transistor, the 31st positive input decay section may be constituted by a variable resistor, the 31st positive input band regulating section may be constituted by a variable capacitor, The 31st negative input attenuator may be composed of a variable resistor, the 31st negative input band adjuster may be composed of a variable capacitor, and the 31st negative output attenuator may be composed of a variable resistor The 31st output switching section may be composed of a MOS transistor, and the 31st operational amplifier may be composed of an operational amplifier.

The third voltage gain control unit VGA_3 adjusts the voltage gain of the signal transmitted from the third low-pass unit LPF_3.

The 32nd feedback unit DCOC_32 receives the output signal of the third voltage gain control unit VGA_3 through the 32nd input switching unit to adjust the size of a signal of a predetermined frequency or less, To the input terminal of the third voltage gain control unit VGA_3 through the switching unit.

As a result, the 32nd feedback unit DCOC_32 adjusts the magnitude of the output signal of the third voltage gain adjuster VGA_3 while removing the DC offset component from the output signal of the third voltage gain adjuster VGA_3, To the gain control unit VGA_3.

Specifically, the 32nd feedback section DCOC_32 includes a 32nd input switching section, a 32nd positive input attenuator, a 32nd positive input band adjuster, a 32nd op amp, a 32nd positive output attenuator, a 32nd negative input attenuator, A 32nd sound input band adjusting section, a 32nd sound output attenuating section, and a 32nd output switching section.

Here, the 32nd input switching section may be composed of a mos transistor, the 32nd positive input attenuator may be constituted by a variable resistor, the 32nd positive input band regulating section may be constituted by a variable capacitor, The 32nd negative input attenuator may be composed of a variable resistor, the 32nd negative input band adjuster may be composed of a variable capacitor, and the 32nd negative output attenuator may be composed of a variable resistor The 32th output switching section may be composed of a MOS transistor, and the 32th op amp may be composed of an operational amplifier.

The baseband receiver for a millimeter wave system according to an embodiment of the present invention operates the eleventh feedback unit DCOC_11 by turning on the eleventh input switching unit and the eleventh output switching unit when a signal is received from a short distance, The twelfth input unit and the twelfth output switching unit are turned on to operate the twelfth feedback unit DCOC_12, the twenty-first input switching unit and the twenty-first output switching unit are turned on to operate the twenty-first feedback unit DCOC_21, The twenty-second feedback unit DCOC_22 is operated by turning on the switching unit and the twenty-second output switching unit, the thirty-first feedback unit DCOC_31 is operated by turning on the thirty-first input switching unit and the thirty- And the 32nd output switching unit are turned on to operate the 32nd feedback unit DCOC_32.

Meanwhile, when a signal is received at a long distance, the baseband receiver for a millimeter wave system according to an embodiment of the present invention turns off the eleventh input switching unit and the eleventh output switching unit to operate the eleventh feedback unit DCOC_11 The twelfth input switching unit and the twelfth output switching unit are turned off to disable the twelfth feedback unit DCOC_12 and the twenty-first input switching unit and the twenty-first output switching unit are turned off to turn off the twenty-first feedback unit DCOC_21, The twenty-second input switching unit and the twenty-second output switching unit are turned off to not operate the twenty-second feedback unit DCOC_22, and the thirty-first input switching unit and the thirty-first output switching unit are turned off, The 32nd input switching unit and the 32nd output switching unit are turned off and the 32nd feedback unit DCOC_32 is not operated.

Thus, even if a signal is received at a short distance or a signal is received at a long distance, a uniform signal to noise ratio (SNR) can be maintained.

The baseband receiver for a millimeter wave system according to embodiments of the present invention must have a first low pass part (LPF_1), an eleventh feedback part (DCOC_11), a first voltage gain controller (VGA_1), a twelfth feedback part The second low pass part LPF_2, the twenty first feedback part DCOC_21, the second voltage gain control part VGA_2, the twenty second feedback part DCOC_22, the third low pass part LPF_3, DCOC_31, the third voltage gain control unit VGA_3, and the 32nd feedback unit DCOC_32.

The baseband receiver for a millimeter wave system according to embodiments of the present invention includes a first low pass part LPF_1, an eleventh feedback part DCOC_11, a first voltage gain control part VGA_1, a twelfth feedback part DCOC_12 , A second low pass (LPF_2), a twenty first feedback (DCOC_21), a second voltage gain control (VGA_2) and a twenty second feedback (DCOC_22) 11 feedback unit DCOC_11, a first voltage gain control unit VGA_1, a twelfth feedback unit DCOC_12, a second low pass unit LPF_2, a twenty-first feedback unit DCOC_21, a second voltage gain control unit VGA_2 (22), a 22nd feedback section (DCOC_22), a 3rd low pass section (LPF_3), a 31st feedback section (DCOC_31), a 3rd voltage gain control section (VGA_3), a 32nd feedback section (DCOC_32) A fourth feedback unit DCOC_41, a fourth voltage gain control unit VGA_4, and a forty-second feedback unit DCOC_42.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

On the contrary, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

LPF_1: The first low pass section
DCOC_11: 11th feedback section
VGA_1: first voltage gain regulator
DCOC_12: Twelfth feedback section
LPF_2: the second low pass section
DCOC_21: Twenty-first feedback section
VGA_2: the second voltage gain control unit
DCOC_22: the 22nd feedback section
LPF_3: Third low pass section
DCOC_31: the 31st feedback section
VGA_3: the third voltage gain control unit
DCOC_32: the 32nd feedback section
LNA: Low Noise Amplifier
MIX: Mixer
111: eleventh input switching unit
112: eleventh positive input attenuator
113: eleventh positive input band adjusting section
114: eleventh positive output decay section
115: eleventh op amp
116: the eleventh sound input attenuator
117: the eleventh sound input band adjusting section
118: eleventh sound output damping unit
119: eleventh output switching section

Claims (12)

A first low pass section for passing a signal of a predetermined frequency or less from an input RF signal;
Pass filter for receiving the output signal of the first low-pass unit through an eleventh input switching unit to adjust the size of a signal of a predetermined frequency or lower and passing the signal through the eleventh output switching unit to the input terminal of the first low- An eleventh feedback section for transmitting the feedback signal;
A first voltage gain adjusting unit for adjusting a voltage gain of a signal transmitted from the first low pass unit;
The first voltage gain control unit receives the output signal of the first voltage gain control unit through the twelfth input switching unit to control the size of a signal of a predetermined frequency or less and passes the signal through the twelfth output switching unit, A twelfth feedback section for transmitting the input signal to an input terminal;
A second low pass section for passing a signal of a predetermined frequency or less from a signal transmitted from the first voltage gain regulator;
Pass filter to receive the output signal of the second low-pass unit through a twenty-first input switching unit to regulate and pass a signal having a frequency lower than a predetermined frequency and to pass the passed signal through an output switching unit to an input terminal of the second low- A twenty-first feedback unit for transmitting the twenty-
A second voltage gain controller for adjusting a voltage gain of a signal transmitted from the second low pass part; And
The second voltage gain control unit receives the output signal of the second voltage gain control unit through the twenty-second input switching unit to control the magnitude of a signal of a predetermined frequency or less and passes the signal through the twenty- And a twenty-second feedback section for transmitting the twenty-second feedback section to the input stage.
The method according to claim 1,
The eleventh feedback unit includes the eleventh input switching unit, the eleventh positive input attenuator, the eleventh positive input band adjuster, the eleventh op amp, the eleventh positive output attenuator, the eleventh negative input attenuator, A band adjustment unit, an eleventh sound output reducing unit, and an eleventh output switching unit.
The method according to claim 1,
The twelfth input unit includes the twelfth input switching unit, the twelfth input attenuator, the twelfth input band regulator, the twelfth operational amplifier, the twelfth output attenuator, the twelfth input attenuator, A twelfth output attenuator, and a twelfth output switching unit. The baseband receiver of claim 1,
The method according to claim 1,
The twenty-first feedback unit includes the twenty-first input switching unit, the twenty-first positive input decoupling unit, the twenty-first positive input band adjusting unit, the twenty-first op-amp, the twenty-first positive output decoupling unit, A band adjuster, a twenty-first sound output attenuator, and a twenty-first output switching unit.
The method according to claim 1,
The twenty-second feedback unit includes the twenty-second input switching unit, the twenty-second positive input decoupling unit, the twenty-second positive input band adjusting unit, the twenty-second opamp, the twenty-second positive output decoupling unit, A band adjuster, a twenty-ninth negative output attenuator, and a twenty-second output switching unit.
A first low pass section for passing a signal of a predetermined frequency or less from an input RF signal;
Pass filter for receiving the output signal of the first low-pass unit through an eleventh input switching unit to adjust the size of a signal of a predetermined frequency or lower and passing the signal through the eleventh output switching unit to the input terminal of the first low- An eleventh feedback section for transmitting the feedback signal;
A first voltage gain adjusting unit for adjusting a voltage gain of a signal transmitted from the first low pass unit;
The first voltage gain control unit receives the output signal of the first voltage gain control unit through the twelfth input switching unit to control the size of a signal of a predetermined frequency or less and passes the signal through the twelfth output switching unit, A twelfth feedback section for transmitting the input signal to an input terminal;
A second low pass section for passing a signal of a predetermined frequency or less from a signal transmitted from the first voltage gain regulator;
Pass filter to receive the output signal of the second low-pass unit through a twenty-first input switching unit to regulate and pass a signal having a frequency lower than a predetermined frequency and to pass the passed signal through an output switching unit to an input terminal of the second low- A twenty-first feedback unit for transmitting the twenty-
A second voltage gain controller for adjusting a voltage gain of a signal transmitted from the second low pass part;
The second voltage gain control unit receives the output signal of the second voltage gain control unit through the twenty-second input switching unit to control the magnitude of a signal of a predetermined frequency or less and passes the signal through the twenty- A twenty-second feedback section for transmitting the input signal to an input terminal;
A third low pass section for passing a signal of a predetermined frequency or less from a signal transmitted from the second voltage gain regulator;
Passes through the 31st input switching unit to adjust the size of a signal of a predetermined frequency or less and passes the signal through the 31st output switching unit to the input terminal of the third low pass unit A thirty-first feedback section for transmitting the feedback signal;
A third voltage gain controller for adjusting a voltage gain of a signal transmitted from the third low pass part; And
The third voltage gain control unit receives the output signal of the third voltage gain control unit through the 32nd input switching unit to adjust the size of a signal of a predetermined frequency or less and passes the signal through the 32nd output switching unit, And a 32nd feedback section for transmitting the 32th feedback section to the input stage.
The method according to claim 6,
The eleventh feedback unit includes the eleventh input switching unit, the eleventh positive input attenuator, the eleventh positive input band adjuster, the eleventh op amp, the eleventh positive output attenuator, the eleventh negative input attenuator, A band adjustment unit, an eleventh sound output reducing unit, and an eleventh output switching unit.
The method according to claim 6,
The twelfth input unit includes the twelfth input switching unit, the twelfth input attenuator, the twelfth input band regulator, the twelfth operational amplifier, the twelfth output attenuator, the twelfth input attenuator, A twelfth output attenuator, and a twelfth output switching unit. The baseband receiver of claim 1,
The method according to claim 6,
The twenty-first feedback unit includes the twenty-first input switching unit, the twenty-first positive input decoupling unit, the twenty-first positive input band adjusting unit, the twenty-first op-amp, the twenty-first positive output decoupling unit, A band adjuster, a twenty-first sound output attenuator, and a twenty-first output switching unit.
The method according to claim 6,
The twenty-second feedback unit includes the twenty-second input switching unit, the twenty-second positive input decoupling unit, the twenty-second positive input band adjusting unit, the twenty-second opamp, the twenty-second positive output decoupling unit, A band adjuster, a twenty-ninth negative output attenuator, and a twenty-second output switching unit.
The method according to claim 6,
The 31st feedback section includes the 31st input switching section, the 31st positive input attenuator, the 31st positive input band adjuster, the 31st op amp, the 31st positive output attenuator, the 31st negative input attenuator, A 31st sound output reducing unit, and a 31st output switching unit.
The method according to claim 6,
The 32nd feedback section includes the 32nd input switching section, the 32nd positive input attenuator, the 32nd positive input band adjuster, the 32nd op amp, the 32nd positive output attenuator, the 32nd negative input attenuator, A 32nd sound output attenuator, and a 32nd output switching unit.

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