High-matching high-precision voltage difference generating circuit

A generation circuit, high-precision technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as obvious mismatch and large influence of current technology

Pending Publication Date: 2018-06-12
SHENZHEN TITAN MICRO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a high-matching and high-precision differential voltage generating circuit for the problem that the current copied by the current mirror is greatly affected by the process and the mismatch is obvious in the current differential voltage generating circuit.

Method used

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  • High-matching high-precision voltage difference generating circuit
  • High-matching high-precision voltage difference generating circuit
  • High-matching high-precision voltage difference generating circuit

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of 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] See figure 1 , figure 1 It is a schematic diagram of a high-matching and high-precision pressure difference generating circuit according to an embodiment of the present invention.

[0023] In this embodiment, the high-matching and high-precision differential pressure generating circuit includes a control signal generating circuit and a differential voltage circuit, and the control signal generating circuit includes a clock chip and a control circuit. The control signal generating circuit is connected with the pressure difference circuit.

[0024] See figure 2 , figure 2 It is a schema...

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PUM

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Abstract

A high-matching high-precision voltage difference generating circuit comprises a control signal generating circuit and a voltage difference circuit. The control signal generating circuit comprises a clock chip and a control circuit, the clock chip comprises two input ports and a plurality of signal output ports, the signal output ports are connected with the control circuit, the control circuit receives electric signals of the signal output ports and distributes a power source into two output circuits to output through current output ports, and the two output circuits are unchanged in difference value. The current output ports of the control circuit are connected with the voltage difference circuit, and the voltage difference circuit comprises triodes used for forming voltage difference. The high-matching high-precision voltage difference generating circuit has advantages that voltage difference is formed by clock control signals for controlling a duty ratio and triode connection, eachcircuit of current is sampled, the voltage difference is only associated with the duty ratio of the clock control signals and parameters of the triodes, low process influences are realized, and the defect of current mirror mismatching is overcome.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a high-matching and high-precision voltage difference generating circuit. Background technique [0002] The existing voltage difference generation circuit generally adopts the working mode of the current mirror to copy a current to form a voltage difference between two ports connected with resistors. [0003] However, the current copied by the current differential voltage generation circuit through the current mirror is greatly affected by the process, and the mismatch is obvious. Contents of the invention [0004] Based on this, it is necessary to provide a high-matching and high-precision differential voltage generating circuit for the problem that the current copied by the current mirror is greatly affected by the process and the mismatch is obvious in the current differential voltage generating circuit. [0005] A high-matching and high-precision voltage difference gener...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 秦海怡冯根强张伟门洪达刘文锋
Owner SHENZHEN TITAN MICRO ELECTRONICS
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