Patent ID: 8004266

Claim:
A current mode chopper stabilized bandgap voltage reference circuit for a regulator comprising: current mirror circuitry configured for mirroring first and second currents into first and second networks to generate a forward diode voltage signal and a PTAT (proportional to absolute temperature) component signal, respectively, and a third current having a derived temperature coefficient based on the first and second currents into a third network to generate a reference voltage signal to be supplied to the regulator; an amplifier configured for amplifying a differential signal of the forward diode voltage signal and the PTAT component signal to output a fourth current to control the first and second currents in the first and second diode networks; a modulator coupled between the current mirror circuitry and the amplifier, synchronized to a chopper clock, and configured for modulating the differential signal to be supplied to the amplifier; a demodulator coupled to the amplifier, synchronized to the chopper clock, and configured for demodulating the fourth current; a gain loop compensation circuit coupled to the demodulator to compensate the amplifier, and filter the fourth current for noise components; and a bypass circuit provided to the third network for filtering the third current.