Device for converting small alternating current signal into direct current signal

Abstract

The invention discloses a device for converting an alternating current small signal into a direct current signal. The device comprises a to-be-tested signal Vint, a first module, a second module, a third module, a power supply module and an output unit, wherein an output port of the to-be-tested signal is connected with an input port of the first module, an output port of the second module is connected with the third module, the power supply module is respectively connected with one input port of one of the first module, the second module and the third module, and an output port of the thirdmodule is connected with the output unit. The device is high in implementation precision, small in environmental influence, low in noise level, large in gain conversion, and capable of effectively controlling quiescent current, frequency deviation and full-scale ripples; meanwhile, the high and low levels, the rising edge time and the falling edge time of the output square wave signal are all controlled within an effective range.

Description

technical field [0001] The invention relates to the field of signal conversion, in particular to a device for converting small AC signals to DC signals. Background technique [0002] In recent years, with the extensive application of measurement and control systems, the problem of signal mismatch between the AC output of sensors and the DC input of instruments is still prominent. Currently, instruments and instruments on the market are mostly based on DC input signals, while AC signals are sensor output signals. One of the more common ones, for this purpose it is necessary to design a high-efficiency AC-DC signal transmission module. [0003] At present, the common problems of most AC small signal conversion are low precision, easy to be interfered by the external environment, large noise level, small gain conversion, large frequency deviation, high full-circuit ripple, large quiescent current, small output frequency range, The effective range of the high and low levels of ...

AI Technical Summary

Problems solved by technology

[0003] At present, the common problems of most AC small signal conversion are low precision, easy to be interfered by the external environment, large noise level, small gain conversion, large frequency deviation, high full-circuit ripple, large quiescent current, small output frequency range, The effective range of the high and low level of the output square wave signal is uncontrollable, and the effective range of the rising edge and falling edge time of the output square wave signal is uncontrollable

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