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

Claim 19:
20. 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 output nodes; and
wherein the circuitry further comprises first and second clamp switches coupled to the first and second output nodes respectively, to selectively couple the first and second output nodes to a reference voltage.