Patent ID: 8159299
Filing Date: 2012-04-17
Classification: H03F

Abstract:
1. A duplicate feedback resistor network in Class D amplifiers comprising: an input section with input switches which takes audio input and drives a first input to a control circuit, said control circuit output which drives output pre-drivers, said output pre-drivers which drive an H-bridge switch, said H-bridge switch which drives differential audio outputs and a regular feedback network, said regular feedback network in communication with said differential audio outputs is connected through said input section, through said input switches, and drives said first input of said control circuit, said duplicate feedback resistor network in communication with said control circuit output is connected through said input section, through said input switches, and drives a second input of said control circuit, wherein said duplicate feedback resistor network is used to complete a control loop of said Class D amplifier in order to suppress pops and clicks noise when starting up and exiting a standby mode and shutting down or entering said standby mode in said Class D amplifier.