Apparatus and method for transmitting an analog signal, and analog signal multiplexer

摘要

Disclosed are an apparatus and a method for transmitting an analog signal, and an analog signal multiplexer. The apparatus comprises a photocoupler to receive an input analog signal and transform the input analog signal into an output analog signal, which varies with the input analog signal in a manner of non-linearity. The apparatus further comprises a non-linearity correcting unit to receive the output analog signal and correct the non-linearity to output a corrected output analog signal. An analog signal may be transmitted with a photocoupler.

主权项

1. An apparatus for transmitting an analog signal, comprising:
a photocoupler configured to receive an input analog signal and transform the input analog signal into an output analog signal, which varies with the input analog signal in a manner of non-linearity; a non-linearity correcting unit configured to receive the output analog signal and correct the non-linearity to output a corrected output analog signal; an input unit to transform an input voltage signal into a current signal as the input analog signal; wherein the input unit further comprises a temperature drift compensating unit to compensate a temperature drift caused by the non-linearity correcting unit; and wherein the temperature drift compensating unit comprises a compensating device, a constant current source and a compensating power amplifier to introduce into the input voltage signal a compensating temperature drift that corresponds to the temperature drift caused by the non-linearity correcting unit.