Voltage compensation circuit and control method thereof

摘要

A voltage compensation circuit and a control method thereof dynamically compensate a voltage drop caused by supplying power from a first power line to a function circuit. The voltage compensation circuit includes an amplifier, a detection module and a boosting module. The amplifier has an inverting input end coupled to the first power line and the function circuit to be supplied with a load voltage supplying to the function circuit, a non-inverting input end for being supplied with a reference voltage, and an output end coupled to the detection module to output a comparison signal. The boosting module is coupled between the detection module and the inverting input end of the amplifier. The detection module generates compensation voltage information according to the comparison signal. The boosting module outputs the compensation voltage to the inverting input end of the amplifier according to the compensation voltage information.

主权项

1. A voltage compensation circuit for dynamically compensating a voltage drop caused by supplying power from a first power line to a function circuit coupled between the first power line and a second power line, comprising:
a first amplifier having an inverting input end coupled to the first power line and the function circuit to be supplied with a load voltage supplied to the function circuit, a non-inverting input end of which is supplied with a reference voltage, and an output end of which for outputting a first comparison signal generated by comparing the load voltage with the reference voltage; a detection module coupled to the output end of the first amplifier, for generating compensation voltage information according to the first comparison signal; and a boosting module coupled between the detection module and the inverting input end of the first amplifier, for generating a compensation voltage according to the compensation voltage information and supplying the compensation voltage to the inverting input end of the first amplifier, where an input voltage of the function circuit is equal to a combination of the load voltage and the compensation voltage.