Patent ID: 8008948
Filing Date: 2011-08-30
Classification: G01R

Abstract:
1. A peak voltage detector circuit for detecting a peak voltage of an input voltage comprising: a comparator having a first input terminal and a second input terminal, wherein the input voltage is input into the first input terminal of the comparator; a first clock signal generating circuit for generating a first clock signal; a second clock signal generating circuit for generating a second clock signal; a counter circuit for counting up a counter value in synchronization with the first clock signal, when an output signal output from the comparator is in a first state, wherein the counter circuit counts down the counter value in synchronization with the second clock signal; and a digital-analog conversion circuit for outputting an output voltage corresponding to the counter value of the counter circuit, wherein the output voltage of the digital-analog conversion circuit is input into the second input terminal of the comparator, wherein the first clock signal has a wave period shorter than that of the second clock signal.