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High-stability constant-current source generation circuit

A technology for generating circuits and constant current sources, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of poor stability of constant current source circuits and high power consumption, and achieve high output stability and low power consumption Effect

Inactive Publication Date: 2018-08-21
李启同
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high stability constant current source generating circuit in order to solve the problems of poor stability and high power consumption of the existing constant current source generating circuit

Method used

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Embodiment Construction

[0008] The present invention provides a high-stability constant current source generating circuit. In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0009] As shown in Figure 1, a high-stability constant current source generating circuit includes a start-up circuit and a constant-current source core circuit; the start-up circuit includes MOS tubes M9, M10, M11, M12 and resistors R5 and R6. The core circuit of the constant current source includes MOS transistors M1, M2, M3, M4, M5, M6, M7, M8, resistors R1, R2, R3, R4 and capacitor C1, and the sources of MOS transistors M9, M10, M11 are all connected to the power supply voltage VDD, the gate of M9...

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Abstract

The invention relates to the technical field of analog circuits, in particular to a high-stability constant-current source generation circuit which comprises a starting circuit and a constant-currentsource core circuit. The constant-current source generation circuit is improved based on a traditional constant-current source circuit, effectively solves the problems of poor stability and high powerconsumption of a constant-current source generation circuit in the prior art, and has high output stability and low power consumption.

Description

technical field [0001] The invention relates to the technical field of analog circuits, in particular to a highly stable constant current source generating circuit. Background technique [0002] The constant current source generating circuit is an important module in analog or digital-analog hybrid integrated circuits. Its function is to provide the system with a constant output current that has nothing to do with the power supply voltage. The high-precision, low-power constant current source is stable for the entire circuit. Sex matters. In recent years, the research on the constant current source circuit has developed rapidly, especially the research on the constant current source based on the bandgap reference voltage circuit has been relatively mature, and there are in-depth research on temperature compensation and process deviation adjustment. However, in the standard CMOS process, due to the limitation of the actual performance of the BJT transistor, the traditional...

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Application Information

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IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 李启同约翰利斯特张丽
Owner 李启同