Patent ID: 8120422
Filing Date: 2012-02-21
Classification: H03F

Abstract:
1. In an amplifier system, with a ripple reduction loop comprising: a first chopper; a first amplifier having an input coupled to an output of the first chopper; a second chopper having an input coupled to an output of the first amplifier; a second amplifier having an input coupled to an output of the second chopper; a third chopper, an output of the second amplifier having its output capacitively coupled to an input of the third chopper; a third amplifier coupled as an integrator having an input coupled to an output of the third chopper, an output of the integrator being coupled to combine with the output of the first amplifier as the input of the second chopper; and at least one Miller capacitor coupled between an output of the second amplifier and the input of the second amplifier.