Patent ID: 7551023
Filing Date: 2009-06-23
Classification: H03F

Abstract:
1. A feedback unit for the negative feedback of outputs ( 4 , 5 ) of an amplifier to inputs ( 2 , 3 , 6 , 7 ) of the amplifier so as to reduce an offset fraction in the output signal of the amplifier, wherein the feedback unit has a lowpass characteristics and comprises an amplifier stage ( 10 ) whose input ( 11 , 12 ) is connected to the outputs ( 4 , 5 ) of the amplifier ( 1 ) as well as at least one Miller capacitance ( 13 , 15 ) connected between an input ( 11 , 12 ) and an output ( 14 , 16 ) of the amplifier stage and influencing the lowpass characteristics, characterized in that the input ( 11 , 12 ) of the amplifier stage ( 10 ) is directly connected to the inputs ( 6 , 7 ) of the amplifier ( 1 ) so that the input signal of the amplifier stage ( 10 ) is fed to the inputs ( 6 , 7 ) of the amplifier.