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Gilbert cell with folding structure

A folded structure, field effect tube technology, applied in the direction of electrical components, amplification control, gain control, etc., can solve problems such as unsatisfactory, and achieve the effect of simple structure and wide range of use

Inactive Publication Date: 2014-01-15
新疆芯团科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the output swing of the upper stage is large or the next stage requires a large input swing, this structure will not satisfy

Method used

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  • Gilbert cell with folding structure
  • Gilbert cell with folding structure
  • Gilbert cell with folding structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] see figure 2 A preferred embodiment of the Gilbert unit with a folding structure in the present invention includes a first input terminal, a second input terminal, a load circuit, and an input control circuit connected to the first input terminal and the second input terminal , a mirror circuit connected to the input control circuit, a gain control circuit connected to the mirror circuit, a tail current circuit connected to the gain control circuit, a first output connected to the load circuit and the input control circuit terminal and a second output terminal.

[0012] Please also see image 3 , the first input terminal and the second input terminal are used to input a pair of differential signals VIN+, VIN-. The load circuit includes a first resistor RD1 and a second resistor RD2. The input control circuit includes a first FET M1 , a second FET M2 , a third FET M3 and a fourth FET M4 . The mirror circuit includes a fifth FET M5 , a sixth FET M6 , a tenth FET M10 ...

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PUM

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Abstract

The invention relates to a Gilbert cell with a folding structure, which comprises a first input end, a second input end, a load circuit, an input control circuit, a gain control circuit, a tail current, a first output end and a second output end, wherein the first input end and the second input end are used for inputting a pair of differential signals; the first output end and the second output end are used for outputting a pair of differential signals; the Gilbert cell with the folding structure also comprises a mirror image circuit connected between the input control circuit and the gain control circuit; and the mirror image circuit comprises a fifth field effect transistor connected with the input control circuit, a sixth field effect transistor connected with the input control circuit, a tenth field effect transistor connected with the sixth field effect transistor and the gain control circuit and an eleventh field effect transistor connected with the fifth field effect transistor and the gain control circuit. The Gilbert cell disclosed by the invention has the advantages of simple structure and wide using range.

Description

technical field [0001] The invention relates to a Gilbert unit, especially a Gilbert unit with a folded structure. Background technique [0002] Gilbert unit is a variable gain amplifier, its gain can be continuously changed from negative value to positive value, and it is suitable for systems that require reverse change in gain. [0003] see figure 1 , figure 1 It is an existing Gilbert unit, wherein VIN1+, VIN1- are input differential signals, Vcont1+, Vcont1- are gain adjustment signals, VB1 is source current bias voltage, and VOUT1+, VOUT1- are output voltages. According to this structure, it can be concluded that the range of the input common-mode voltage VCM1 is: VGS11+2*VDS1<VCM1<VDD1-I1*R / 2+VTH1, where VDD1 is the power supply voltage, I1 is the current flowing through the FET M77, VGS11 It is the gate-source voltage of the field effect transistor M11 when it flows through I1 / 2, VDS1 is the overdrive voltage, VCM1 is the common mode voltage of the input diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G3/30
Inventor 范方平
Owner 新疆芯团科技集团有限公司