Numerical-control direct-current voltage source

A DC voltage source, voltage sampling technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems that users are difficult to grasp, complex structure, complex control and so on
CN103218004BActive Publication Date: 2015-02-04INST OF ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF ELECTRONICS CHINESE ACAD OF SCI
Publication Date
2015-02-04

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Abstract

The invention discloses a numerical-control direct-current voltage source. Reference voltage is provided by a D / A (digital to analog) conversion module, and is outputted by a power operational amplifying module, the outputted voltage is sampled and fed back to the input end of the power operational amplifying module for closed loop control, the outputted voltage can reach several dozens of volts, the accuracy can reach 1 per mill, and the bidirectional voltage output can be realized without an output polar reversing circuit. In addition, the numerical-control direct-current voltage source also has an overcurrent protection function and an outputted voltage and current measuring and displaying function.
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Description

technical field

[0001] The invention relates to the technical field of power supplies in the electronic information industry, in particular to a digitally controlled DC voltage source that uses digital signal input to control output. Background technique

[0002] The voltage and current source is one of the key designs in the development of many instruments and equipment. The error generated when the power supply is working will affect the accuracy of the entire system, and the use of the power supply will cause many adverse consequences.

[0003] There are many varieties of ordinary DC regulated power supplies, but they all have the following problems: ①The output voltage or current is adjusted by coarse adjustment (band switch) and fine adjustment (potentiometer). In this way, when the output voltage or current needs to be accurately output, or needs to be changed in a small range (such as 1.01-1.02V or 1.01-1.02mA), the difficulty is greater. In addition, as the use time...

Claims

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