Patent ID: 7605616

Claim:
A voltage detector circuit comprising: a detecting section having n number (n is a natural number) of voltage-controlled current sources; a current mirror circuit; and a reference current generating section comprising: a voltage-controlled current source comprising: a control terminal; a reference terminal; and an output terminal, wherein the reference current generating section is configured to determine an output current of the output terminal according to a potential of the control terminal relative to the potential of reference terminal, wherein the control terminal of the voltage-controlled current source of the front circuit stage of the detecting section receives an input of a reference potential, and its output terminal is coupled to a current output terminal of the current mirror circuit through a first node, wherein the control terminal and output terminal of voltage-controlled current sources except for the voltage-controlled current source of the front circuit stage of the detecting section are commonly coupled to each other and coupled to the reference terminal of its associated preceding voltage-controlled current source, and wherein the reference terminal of the voltage-controlled current source of the last circuit stage of the detecting section receives an input of a potential to be detected.