Patent ID: 9065386
Filing Date: 2015-06-23
Classification: H03F

Abstract:
1. An apparatus comprising: an output stage having a bridge configuration including a first pair of gain transistors to receive a first portion of a differential signal and to amplify the first portion of the differential signal to an amplified first differential signal portion and a second pair of gain transistors to receive a second portion of the differential signal and to amplify the second portion of the differential signal to an amplified second differential signal portion, the second pair of gain transistors configured to be enabled in a first power mode and to be disabled in a second power mode, wherein the second pair of gain transistors are coupled to a first supply voltage node configured to receive a first supply voltage in the first power mode from a battery voltage and to receive a second supply voltage in the second power mode from a voltage converter, the second supply voltage less than the first supply voltage, wherein the second pair of gain transistors have a body connection coupled to a second supply voltage node configured to receive the second supply voltage.