Patent ID: 8378731
Filing Date: 2013-02-19
Classification: G11B,H03F,H03G

Abstract:
1. An apparatus comprising: an amplifier configured to receive an asymmetric signal; a first resistance coupled between an input node and an output node of the amplifier; a second resistance coupled to the input node of the amplifier; a first switch configured to be controlled during a first interval to couple the second resistance to a positive resistance to increase a gain of the amplifier to correct the asymmetric signal, wherein the gain is a function of the first resistance and a combination of the second resistance and the positive resistance; and a second switch configured to be controlled during a second interval to couple the second resistance to a negative resistance to decrease the gain of the amplifier to correct the asymmetric signal, wherein the gain is a function of the first resistance and a combination of the second resistance and the negative resistance.