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Voltage-current converting circuit

A technology of current conversion and voltage, applied in the direction of electrical components, automatic power control, etc., can solve the problem of poor linearity of voltage-current conversion circuit, achieve the effect of improving linearity and expanding the output frequency range

Active Publication Date: 2012-04-11
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem of poor linearity of the existing voltage-current conversion circuit, the present invention provides a voltage-current conversion circuit with good linearity

Method used

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Embodiment Construction

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] In order to solve the technical problem of poor linearity of the existing voltage-current conversion circuit, the present invention provides a voltage-current conversion circuit, such as figure 2 As shown, the voltage-current conversion circuit includes: a first mos transistor M1, a second mos transistor M2, a first current mirror 21, a second current mirror 22, and a load 23;

[0023] The first MOS transistor M1 and the first current mirror 21 form a first voltage-current conversion circuit; the second MOS transistor M2 and the second current mirror 22 form a s...

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Abstract

The invention provides a voltage-current converting circuit, belonging to the field of voltage-current conversion. The voltage-current converting circuit comprises a first MOS (metal oxide semiconductor) pipe, a second MOS pipe, a first current lens, a second current lens and a load; the first MOS pipe and the first current lens are formed into a first level voltage-current converting circuit; the second MOS pipe and the second current lens are formed into a second level voltage-current converting circuit; the grid of the first MOS pipe is connected with the input voltage, the source electrode of the first MOS pipe is earthed, the drain electrode of the first MOS pipe is connected with the source electrode of the second MOS pipe and the first current lens, and the first current lens is connected with the load; the grid of the second MOS pipe is connected with the input voltage and is connected with the grid of the first MOS pipe, the drain electrode of the second MOS pipe is connected with the second current lens, and the second current lens is connected with the load; and the load is earthed. The voltage-current converting circuit provided by the invention increases the grade of the voltage-current converting circuit, and improves the linearity of the voltage-current conversion.

Description

technical field [0001] The invention belongs to the field of voltage-current conversion, in particular to a voltage-current conversion circuit. Background technique [0002] The voltage-current conversion circuit in the existing phase-locked loop often adopts figure 1 The circuit form shown. The main part of the voltage-current conversion circuit includes 3 mos tubes and a load. Among them, the first mos tube M1 is an enhanced nmos tube; its source is grounded, its drain is connected to the drain of the second mos tube M2, and its gate is connected to the input voltage Vin; the second mos tube is an enhanced pmos tube; its source Connected to the power supply, the gate is connected to the gate of the third mos tube, and connected to the drain; the third mos tube is an enhanced pmos tube; its source is connected to the power supply, and the drain is connected to the load; the load is grounded. [0003] When the technology becomes more and more advanced, the line width beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/099
Inventor 刘辉傅璟军胡文阁
Owner BYD SEMICON CO LTD
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