Patent ID: 6060921
Filing Date: 2000-05-09
Classification: H03K

Abstract:
A voltage threshold detection circuit comprising:a diode and a transistor, the diode being coupled to the gate of the transistor, wherein the diode and the transistor are arranged so that (i) when a voltage level of a signal applied to one of the diode and the transistor crosses a predetermined threshold, a switch state of one of the diode and the translator changes to thereby change an output of the voltage detection circuit and (ii) a voltage drop across the diode is matched with a threshold voltage of the transistor so that when a voltage level of a signal coupled to the transistor crosses a predetermined threshold the transistor is switched on; anda charging circuit coupled to the source-drain path of the transistor configured to bring a voltage at a first node to a predetermined level before said signal crosses said predetermined threshold, whereby when the transistor is switched on, a voltage at the first node is discharged through the transistor and the output of the voltage threshold detection circuit is changed.