Patent ID: 11881826
Assignee: CIRRUS LOGIC INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A circuitry comprising:
audio amplifier circuitry for receiving an audio signal to be amplified; and
first and second output nodes for outputting first and second differential output signals, wherein the circuitry further comprises:
common mode buffer circuitry; and
low pass filter circuitry;

wherein the low pass filter circuitry has an input that is configured to receive a common mode voltage and an output coupled to an input of the common mode buffer circuitry and the common mode buffer circuitry is configured to selectively output a common mode signal to the first and second nodes; and
wherein the circuitry further comprises a low pass filter discharge switch coupled in parallel with a capacitance of the low pass filter circuitry, the low pass filter discharge switch being operable to discharge the capacitance.