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CN109495083A - Bipolarity electrically controlled attenuator - Google Patents

Bipolarity electrically controlled attenuator Download PDF

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Publication number
CN109495083A
CN109495083A CN201811155132.6A CN201811155132A CN109495083A CN 109495083 A CN109495083 A CN 109495083A CN 201811155132 A CN201811155132 A CN 201811155132A CN 109495083 A CN109495083 A CN 109495083A
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circuit
voltage
diode
resistance
row
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CN201811155132.6A
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CN109495083B (en
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李毅
孟进
何方敏
赵治华
葛松虎
王青
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Naval University of Engineering PLA
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Naval University of Engineering PLA
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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00Networks using active elements
    • H03H11/02Multiple-port networks
    • H03H11/24Frequency-independent attenuators

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  • Attenuators (AREA)
  • Networks Using Active Elements (AREA)

Abstract

本发明提供了一种双极性电调衰减器,包括射频电路和控制电路;射频电路包括依次电连接的第一LC补偿电路、第一巴伦电路、第一阻抗变换电路、PIN二极管阵列电路、第二阻抗变换电路、第二巴伦电路和第二LC补偿电路;控制电路包括依次电连接的电压调理电路、电压再调理电路、第一电压到电流转换电路和第一分段线性拟合电路,其中电压调理电路的输出端经第二电压到电流转换电路和第二分段线性拟合电路电连接;PIN二极管阵列电路分别与第一电压到电流转换电路和第二电压到电流转换电路电连接;PIN二极管阵列电路采用四排PIN二极管阵列的结构;本发明具有应用频带宽、插入损耗小、非线性失真小、动态范围大和控制特性逼近线性等特性。

The invention provides a bipolar ESC, including a radio frequency circuit and a control circuit; the radio frequency circuit includes a first LC compensation circuit, a first balun circuit, a first impedance transformation circuit, and a PIN diode array circuit that are electrically connected in sequence , a second impedance transformation circuit, a second balun circuit, and a second LC compensation circuit; the control circuit includes a voltage conditioning circuit, a voltage reconditioning circuit, a first voltage-to-current conversion circuit, and a first piecewise linear fitting that are electrically connected in sequence a circuit, wherein the output end of the voltage conditioning circuit is electrically connected through a second voltage-to-current conversion circuit and a second piecewise linear fitting circuit; the PIN diode array circuit is respectively connected with the first voltage-to-current conversion circuit and the second voltage-to-current conversion circuit Electrical connection; the PIN diode array circuit adopts the structure of four rows of PIN diode arrays; the invention has the characteristics of application frequency bandwidth, small insertion loss, small nonlinear distortion, large dynamic range and close to linear control characteristics.

Description

Bipolarity electrically controlled attenuator
Technical field
The present invention relates to signal processings and technical field of electromagnetic compatibility, and in particular to a kind of bipolarity electrically controlled attenuator.
Background technique
Adaptive radiation interference cancellation techniques are to solve one kind that the communication system transmit-receives antennas such as naval vessel are total to platform interference to have Efficacious prescriptions method, main thought are using constant amplitude reverse phase technology for eliminating come the co-located high reject signal of active suppression.Basic principle be from As reference signal all the way is extracted at the transmitting antenna of the communication emission system of interference source, disturbed communication is input to after processing Between the receiving antenna and receiver of reception system, constant amplitude reverse phase is done with the interference signal that receiving antenna directly receives and is offseted, The interference signal for making to avoid passing through space radiation coupling enters receiver, and the interference of cancellation receiver makes receive-transmit system can To work at the same time.This method is equally applicable to solve the problems, such as interfering with each other between multi-section transceiver.
Bipolarity electrically controlled attenuator is one of the Primary Component in interference cancellation system, generally utilizes bis- pole FET or PIN The radio-frequency resistance of pipe realizes the control to attenuation with the variation characteristic of voltage or electric current.Electricity based on bridge-type structure adjusts decaying The features such as device has insertion loss small, and Linear Control is strong, but its design structure is complicated, and Regime during recession range is small.Therefore, it is necessary to A kind of electrically controlled attenuator is developed, the defect of existing method is overcome, is optimized in structure design and Regime during recession range.
Summary of the invention
The purpose of the present invention is to the defects of the prior art, provide a kind of bipolarity electrically controlled attenuator, have and answer With bandwidth, insertion loss is small, non-linear distortion is small, dynamic range is big and control characteristic approaches the characteristics such as linear.
The present invention provides a kind of bipolarity electrically controlled attenuators, it is characterised in that including radio circuit and control circuit;It penetrates Frequency circuit includes the first LC compensation circuit, the first balun circuit, the first impedance inverter circuit, PIN diode being sequentially connected electrically Array circuit, the second impedance inverter circuit, the second balun circuit and the 2nd LC compensation circuit;Control circuit includes being sequentially connected electrically Voltage conditioning circuit, voltage conditioning circuit, first voltage to current converter circuit and the first sectional linear fitting circuit again, The output end of middle voltage conditioning circuit is electrically connected through second voltage to current converter circuit and the second sectional linear fitting circuit; PIN diode array circuit is electrically connected with first voltage to current converter circuit and second voltage to current converter circuit respectively; PIN diode array circuit uses the structure of four row's PIN diode arrays;Radiofrequency signal enters LC compensation electricity by rf inputs Road, control signal is by control voltage input interface, all the way through overvoltage conditioning circuit and sectional linear fitting circuit, to PIN Two rows of PIN diode states in diode array are controlled;Another way is quasi- by piecewise linearity after overvoltage improves again Circuit is closed to control another two rows of PIN diode states.
In above-mentioned technical proposal, balun circuit and impedance transformer are designed using line transformer.
In above-mentioned technical proposal, N number of Diode series shape is respectively adopted in the every row's PIN diode of PIN diode array circuit At, the end diode of first row PIN diode is connected with the head end diode of second row PIN diode through the first inductance, the The end diode of three row's PIN diodes is connected with the head end diode of the 4th row's PIN diode through the second inductance;Every row PIN The head end and tail end of diode are in series with a capacitor respectively;The head end diode of first row and the 4th row's PIN diode is through it Corresponding head end capacitor is electrically connected with the first impedance inverter circuit side output end;The head of second row and third row's PIN diode End diode is electrically connected through its corresponding head end capacitor with the first impedance inverter circuit other side output end;First row and third row The end diode of PIN diode is electrically connected through its corresponding end capacitor with the second impedance inverter circuit side input terminal;The The end diode of two rows and the 4th row's PIN diode is defeated through its corresponding end capacitor and the second impedance inverter circuit other side Enter end electrical connection;External power supply is electrically connected to the sun of the head end diode of first row and third row's PIN diode through inductance respectively Pole;First voltage is electrically connected to through inductance respectively to current converter circuit and second voltage to the input terminal of current converter circuit The cathode of the end diode of two rows and the 4th row's PIN diode.
In above-mentioned technical proposal, voltage conditioning circuit include the first operational amplifier, negative input through resistance Ri2 with Output end electrical connection, negative input connect External Control Voltage through resistance Ri1, and electrode input end connects input voltage through resistance Ri4 VP1, electrode input end are grounded through resistance Ri3.
In above-mentioned technical proposal, conditioning circuit includes third operational amplifier to voltage again, and negative input is through resistance RD6 It is electrically connected with output end, negative input connects voltage conditioning circuit output end through resistance RD5, and electrode input end connects through resistance RD8 Input voltage VP2, electrode input end are grounded through resistance RD7.
In above-mentioned technical proposal, first voltage to current converter circuit includes four-operational amplifier and field effect transistor N2;Its negative input is electrically connected through resistance RD10 with output end, and negative input through resistance RD9 connects voltage, and conditioning circuit is defeated again Outlet, electrode input end meet input voltage VP3 through resistance RD10, and electrode input end is grounded through resistance RD11;Its output end and field The grid of effect triode N2 is electrically connected;The drain electrode of field effect transistor N2 and the output end of PIN diode array circuit are electrically connected It connects;The source electrode of field effect transistor N2 is electrically connected with the first sectional linear fitting circuit.
In above-mentioned technical proposal, second voltage to current converter circuit includes second operational amplifier and field effect transistor N1;Its negative input is electrically connected through resistance RD2 with output end, and negative input connects voltage conditioning circuit through resistance RD1 and exports End, electrode input end meet input voltage VP3 through resistance RD4, and electrode input end is grounded through resistance RD3;Its output end and field-effect The grid of triode N1 is electrically connected;The drain electrode of field effect transistor N12 is electrically connected with the output end of PIN diode array circuit; The source electrode of field effect transistor N1 is electrically connected with the second sectional linear fitting circuit.
In above-mentioned technical proposal, the first sectional linear fitting circuit includes M parallel branch, and every branch is provided with one A resistance, the resistance of each branch are in series with 0 to M-1 diode respectively;The anode of above-mentioned diode meets effect triode N2 Source electrode;The minus earth of above-mentioned diode.
In above-mentioned technical proposal, the second sectional linear fitting circuit includes M parallel branch, and every branch is provided with one A resistance, the resistance of each branch are in series with 0 to M-1 diode respectively;The anode of above-mentioned diode meets effect triode N1 Source electrode;The minus earth of above-mentioned diode.
It is big to realize Regime during recession range by using the structure of four row's PIN diode arrays by the present invention;Each row PIN Diode realizes high power capacity by using the identical multiple concatenated structures of PIN diode of number.Control of the invention Road is first connected method again in parallel using the diode of different number, makes the ideal controlling curve of controlling curve piecewise approximation. The present invention can make bipolarity electrically controlled attenuator bulk properties be impedance-matched to end by line transformer and LC compensation circuit 50 ohm characteristic impedances of mouth.Electrically controlled attenuator structure according to the invention is simple, layout symmetry, non-linear distortion are small, power The features such as capacity is big, applicable band is wide is therefore particularly suitable for wideband high-power adaptive interference cancellation system or similar answers Use occasion
Detailed description of the invention
Structural block diagram Fig. 1 of the invention
Radio circuit example Fig. 2 of the invention
Control circuit example Fig. 3 of the invention
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments, convenient for this hair is well understood It is bright, but they limiting the invention.
As shown in Figure 1, providing a kind of bipolarity electrically controlled attenuator, it is characterised in that including radio circuit and control electricity Road;Radio circuit includes the first LC compensation circuit being sequentially connected electrically, the first balun circuit, the first impedance inverter circuit, PIN bis- Pole pipe array circuit, the second impedance inverter circuit, the second balun circuit and the 2nd LC compensation circuit;Control circuit includes successively electric Conditioning circuit, first voltage to current converter circuit and the first sectional linear fitting are electric again for voltage conditioning circuit, the voltage of connection Road, wherein the output end of voltage conditioning circuit is electrically connected through second voltage to current converter circuit and the second sectional linear fitting circuit It connects;PIN diode array circuit is electrically connected with first voltage to current converter circuit and second voltage to current converter circuit respectively It connects;PIN diode array circuit uses the structure of four row's PIN diode arrays;Radiofrequency signal enters LC by rf inputs and mends Circuit is repaid, control signal is by control voltage input interface, all the way through overvoltage conditioning circuit and the first sectional linear fitting electricity Road controls two rows of PIN diode states in PIN diode array;Another way passes through after overvoltage improves again Two-section linear fit circuit controls another two rows of PIN diode states.Control circuit is converted into for that will control signal Control the current signal of PIN diode radio-frequency resistance variation
As shown in Fig. 2, RF1 is the input of radiofrequency signal;Series inductance Lm1 and shunt capacitance Cm1, Cm2 optimize input terminal Impedance matching, TLF1 and TLF2 are based on line transformer design, respectively balun and impedance transformer, realize voltage respectively It equilibrates to uneven conversion and the impedance of radio frequency path front stage converts.
In above-mentioned technical proposal, N number of Diode series shape is respectively adopted in the every row's PIN diode of PIN diode array circuit At the end diode of first row PIN diode and the head end Diode series of second row PIN diode, third arrange bis- pole PIN The end diode of pipe and the head end Diode series of the 4th row's PIN diode;The head end and tail end of every row's PIN diode are distinguished It is in series with a capacitor;The head end diode and the first impedance inverter circuit side of first row and the 4th row's PIN diode export End electrical connection;The head end diode and the first impedance inverter circuit other side output end electricity of second row and third row's PIN diode Connection;The end diode of first row and third row's PIN diode is electrically connected with the second impedance inverter circuit side input terminal;The The end diode of two rows and the 4th row's PIN diode is electrically connected with the second impedance inverter circuit other side input terminal;External electrical Source is electrically connected to the anode of the head end diode of first row and third row's PIN diode through inductance respectively;First voltage is to electric current The input terminal of conversion circuit and second voltage to current converter circuit is electrically connected to second row and the 4th row PIN bis- through inductance respectively The cathode of the end diode of pole pipe.PIN diode array circuit is the core of bipolarity electrically controlled attenuator, wherein D11, D12 ..., the total n diode of D1n and C1, C2 capacitor form first row, D21, D22 ..., the total n diode of D2n and C3, C4 it is electric Hold composition second row, D31, D32 ..., the total n diode of D3n and C5, C6 capacitor form third and arrange, D41, D42 ..., the total n of D4n A diode and C7, C8 capacitor form the 4th row;Every concatenated capacitor of row for isolated DC control signal, inductance L1, L3, L4, L6 avoid shunting radiofrequency signal, and influence control signal for radiofrequency signal to be isolated;Inductance L2, L5 are straight for being isolated Concatenated two rows of radiofrequency signals are flowed, two rows of radiofrequency signals is avoided to interact;CP1, CP2 are used for power filter, and reduce radio frequency Influence of the signal to control signal.
As shown in figure 3, voltage conditioning circuit includes the first operational amplifier, negative input is through resistance Ri2 and output End electrical connection, negative input connect External Control Voltage through resistance Ri1, and electrode input end meets input voltage VP1 through resistance Ri4, Electrode input end is grounded through resistance Ri3.Conditioning circuit includes third operational amplifier to voltage again, and negative input is through resistance RD6 is electrically connected with output end, and negative input connects voltage conditioning circuit output end through resistance RD5, and electrode input end is through resistance RD8 Input voltage VP2 is met, electrode input end is grounded through resistance RD7.Conditioning circuit is all based on fortune again for voltage conditioning circuit and voltage Linearity of amplifier computing circuit is calculated, input voltage VP1, VP2 are the output voltages that operational amplifier is raised for first and third. Resistance Ri1-Ri4, RD5-RD8 foundation needs to choose.
In above-mentioned technical proposal, first voltage to current converter circuit includes four-operational amplifier and field effect transistor N2;Its negative input is electrically connected through resistance RD10 with output end, and negative input through resistance RD9 connects voltage, and conditioning circuit is defeated again Outlet, electrode input end meet input voltage VP3 through resistance RD10, and electrode input end is grounded through resistance RD11;Its output end and field The grid of effect triode N2 is electrically connected;The drain electrode of field effect transistor N2 and the output end of PIN diode array circuit are electrically connected It connects;The source electrode of field effect transistor N2 is electrically connected with the first sectional linear fitting circuit.Second voltage is to current converter circuit packet Include second operational amplifier and field effect transistor N1;Its negative input is electrically connected through resistance RD2 with output end, cathode input End connects voltage conditioning circuit output end through resistance RD1, and electrode input end connects input voltage VP3, electrode input end warp through resistance RD4 Resistance RD3 ground connection;Its output end is electrically connected with the grid of field effect transistor N1;The drain electrode of field effect transistor N12 and PIN bis- The output end of pole pipe array circuit is electrically connected;The source electrode of field effect transistor N1 is electrically connected with the second sectional linear fitting circuit. Two voltages are used for the electric current for being converted into preceding step voltage to need, their structure and circuit parameter one to current converter circuit It causes, is formed based on operational amplifier linear calculating circuit and field effect transistor circuit, operational amplifier linear calculating circuit mentions For the gate source voltage of field-effect tube, the variation of the variation control field-effect tube drain-source current of gate source voltage, to be radio circuit Middle PIN diode array provides the bias current of variation, and wherein input voltage VP3 is for raising second and four-operational amplifier Output voltage.
In above-mentioned technical proposal, the first sectional linear fitting circuit includes M parallel branch, and every branch is provided with one A resistance, the resistance of each branch are in series with 0 to M-1 diode respectively;The anode of above-mentioned diode meets effect triode N2 Source electrode;The minus earth of above-mentioned diode., the second sectional linear fitting circuit includes M parallel branch, and every branch is all provided with It is equipped with a resistance, the resistance of each branch is in series with 0 to M-1 diode respectively;The anode of above-mentioned diode connects effect three The source electrode of pole pipe N1;The minus earth of above-mentioned diode.Two sectional linear fitting circuits are used for field-effect tube drain-source current It is adjusted to segmentation linear current, realizes the better impedance matching of radio circuit, lower non-linear distortion.First and second segmentations Linear fit circuit is made of a plurality of parallel branch, wherein a branch road only has resistance, branch routing resistance string connection in addition The diode of different number forms, and changes electric current with the variable slope of control voltage for being segmented.There are 4 branch in parallel in embodiment Road, the number of diodes of the branch of series diode are 1,2,3 respectively.The interface OUTA of control circuit and radio circuit and OUTB can be exchanged according to radio circuit to bipolarity requirement.
It is worth noting that, also can be realized bipolarity electricity tune using different control circuits in different applications The control of attenuator.Thus, according to the attenuator that above-mentioned bipolarity electrically controlled attenuator structure designs, use different control electricity Road, also should be within protection scope of the present invention.
In addition, bipolarity electrically controlled attenuator of the invention in addition to apply to adaptive radiation interference cancellation techniques field it Outside, other occasion demands are also able to satisfy
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.

Claims (9)

1. a kind of bipolarity electrically controlled attenuator, it is characterised in that including radio circuit and control circuit;Radio circuit includes successively First LC compensation circuit of electrical connection, the first balun circuit, the first impedance inverter circuit, PIN diode array circuit, the second resistance Transformation circuit, the second balun circuit and the 2nd LC compensation circuit;Control circuit include the voltage conditioning circuit being sequentially connected electrically, Voltage conditioning circuit, first voltage to current converter circuit and the first sectional linear fitting circuit again, wherein voltage conditioning circuit Output end be electrically connected through second voltage to current converter circuit and the second sectional linear fitting circuit;PIN diode array electricity Road is electrically connected with first voltage to current converter circuit and second voltage to current converter circuit respectively;PIN diode array electricity Road uses the structure of four row's PIN diode arrays;Radiofrequency signal enters LC compensation circuit by rf inputs, and control signal passes through Voltage input interface is controlled, all the way through overvoltage conditioning circuit and sectional linear fitting circuit, to two in PIN diode array Row's PIN diode state is controlled;Another way is after overvoltage improves again, by sectional linear fitting circuit to another two rows PIN diode state is controlled.
2. bipolarity electrically controlled attenuator according to claim 1, it is characterised in that: balun circuit and impedance transformer use Line transformer design.
3. bipolarity electrically controlled attenuator according to claim 1, it is characterised in that the every row PIN of PIN diode array circuit Diode is respectively adopted N number of Diode series and is formed, the end diode and second row PIN diode of first row PIN diode Head end diode connect through the first inductance, third arrange PIN diode end diode and the 4th row's PIN diode head end Diode is connected through the second inductance;The head end and tail end of every row's PIN diode are in series with a capacitor respectively;First row and the 4th The head end diode of row's PIN diode is electrically connected through its corresponding head end capacitor with the first impedance inverter circuit side output end; The head end diode of second row and third row's PIN diode is through its corresponding head end capacitor and the first impedance inverter circuit other side Output end electrical connection;The end diode of first row and third row's PIN diode is through its corresponding end capacitor and the second impedance The electrical connection of translation circuit side input terminal;The end diode of second row and the 4th row's PIN diode is through its corresponding end electricity Appearance is electrically connected with the second impedance inverter circuit other side input terminal;External power supply is electrically connected to first row and third through inductance respectively Arrange the anode of the head end diode of PIN diode;First voltage is to current converter circuit and second voltage to current converter circuit Input terminal be electrically connected to respectively through inductance second row and the 4th row's PIN diode end diode cathode.
4. bipolarity electrically controlled attenuator according to claim 3, it is characterised in that voltage conditioning circuit includes the first operation Amplifier, negative input are electrically connected through resistance Ri2 with output end, and negative input connects External Control Voltage through resistance Ri1, Electrode input end meets input voltage VP1 through resistance Ri4, and electrode input end is grounded through resistance Ri3.
5. bipolarity electrically controlled attenuator according to claim 4, it is characterised in that conditioning circuit includes third fortune to voltage again Amplifier is calculated, negative input is electrically connected through resistance RD6 with output end, and negative input connects voltage conditioning electricity through resistance RD5 Road output end, electrode input end meet input voltage VP2 through resistance RD8, and electrode input end is grounded through resistance RD7.
6. bipolarity electrically controlled attenuator according to claim 4, it is characterised in that first voltage to current converter circuit packet Include four-operational amplifier and field effect transistor N2;Its negative input is electrically connected through resistance RD10 with output end, and cathode is defeated Enter end and connect voltage conditioning circuit output end again through resistance RD9, electrode input end meets input voltage VP3 through resistance RD10, and anode is defeated Enter end to be grounded through resistance RD11;Its output end is electrically connected with the grid of field effect transistor N2;The drain electrode of field effect transistor N2 It is electrically connected with the output end of PIN diode array circuit;The source electrode of field effect transistor N2 and the first sectional linear fitting circuit Electrical connection.
7. bipolarity electrically controlled attenuator according to claim 4, it is characterised in that second voltage to current converter circuit packet Include second operational amplifier and field effect transistor N1;Its negative input is electrically connected through resistance RD2 with output end, cathode input End connects voltage conditioning circuit output end through resistance RD1, and electrode input end connects input voltage VP3, electrode input end warp through resistance RD4 Resistance RD3 ground connection;Its output end is electrically connected with the grid of field effect transistor N1;The drain electrode of field effect transistor N12 and PIN bis- The output end of pole pipe array circuit is electrically connected;The source electrode of field effect transistor N1 is electrically connected with the second sectional linear fitting circuit.
8. bipolarity electrically controlled attenuator according to claim 4, it is characterised in that the first sectional linear fitting circuit includes M Parallel branch, every branch are provided with a resistance, and the resistance of each branch is in series with 0 to M-1 diode respectively;On The anode for stating diode connects the source electrode of effect triode N2;The minus earth of above-mentioned diode.
9. bipolarity electrically controlled attenuator according to claim 2, it is characterised in that the second sectional linear fitting circuit includes M Parallel branch, every branch are provided with a resistance, and the resistance of each branch is in series with 0 to M-1 diode respectively;On The anode for stating diode connects the source electrode of effect triode N1;The minus earth of above-mentioned diode.
CN201811155132.6A 2018-09-30 2018-09-30 Bipolar ESC attenuator Active CN109495083B (en)

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CN201811155132.6A CN109495083B (en) 2018-09-30 2018-09-30 Bipolar ESC attenuator

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Application Number Priority Date Filing Date Title
CN201811155132.6A CN109495083B (en) 2018-09-30 2018-09-30 Bipolar ESC attenuator

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CN109495083B CN109495083B (en) 2022-04-19

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Publication number Priority date Publication date Assignee Title
JPS62207016A (en) * 1986-03-07 1987-09-11 Nec Corp Attenuation circuit
US5656978A (en) * 1995-12-11 1997-08-12 Harmonic Lightwaves Control circuit and method for direct current controlled attenuator
CN1162867A (en) * 1996-01-30 1997-10-22 日本电气株式会社 PIN diode variable attenuator
JP2006180237A (en) * 2004-12-22 2006-07-06 Nec Corp Gain control circuit
US7449976B1 (en) * 2007-03-15 2008-11-11 Northrop Grumman Systems Corporation Power efficient PIN attenuator drive circuit
CN101626223A (en) * 2009-08-11 2010-01-13 佛山市宽普射频技术开发有限公司 Electrically controlled attenuator for radio frequency microwave system
CN102195591A (en) * 2011-04-02 2011-09-21 中国电子科技集团公司第二十四研究所 Linear electrically controlled attenuator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62207016A (en) * 1986-03-07 1987-09-11 Nec Corp Attenuation circuit
US5656978A (en) * 1995-12-11 1997-08-12 Harmonic Lightwaves Control circuit and method for direct current controlled attenuator
CN1162867A (en) * 1996-01-30 1997-10-22 日本电气株式会社 PIN diode variable attenuator
JP2006180237A (en) * 2004-12-22 2006-07-06 Nec Corp Gain control circuit
US7449976B1 (en) * 2007-03-15 2008-11-11 Northrop Grumman Systems Corporation Power efficient PIN attenuator drive circuit
CN101626223A (en) * 2009-08-11 2010-01-13 佛山市宽普射频技术开发有限公司 Electrically controlled attenuator for radio frequency microwave system
CN102195591A (en) * 2011-04-02 2011-09-21 中国电子科技集团公司第二十四研究所 Linear electrically controlled attenuator

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* Cited by examiner, † Cited by third party
Title
JIAN TANG等: ""A new broadband bipolar electrical controlled attenuator"", 《2014 17TH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS)》 *
李毅 等: ""高功率大动态范围的双极性电调衰减器的设计"", 《现代雷达》 *

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