Patent ID: 6271691
Filing Date: 2001-08-07
Classification: H03F,H03K

Abstract:
A chopper type voltage comparison circuit comprising:a capacitor having an input voltage or a reference voltage supplied to one end thereof in a switching fashion depending on whether a voltage input operation or a voltage comparison operation is to be performed;a CMOS inverter circuit for voltage amplification having a voltage at the other end of the capacitor input to an input node thereof and having a clock gate section biased so as to be constantly conductive; anda CMOS clocked inverter circuit for input voltage setting, having input and output nodes short-circuited together, and connected to the input node of the CMOS clocked inverter circuit for voltage amplification so that the clock gate section is switch-controlled to be turned on for the voltage input operation, while the clock gate section is switch-controlled to be turned off for the voltage comparison operation.