Patent ID: 11936352
Assignee: APPLE INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method for controlling an amplifier circuit, comprising:
receiving a first input signal through a first input terminal of the amplifier circuit and a second input signal through a second input terminal of the amplifier circuit;
selectively connecting each transistor of a plurality of transistors to the first input terminal of the amplifier circuit or the second input terminal of the amplifier circuit via a respective input chopper circuit of a plurality of input chopper circuits that is controlled based on a value of a respective control signal from a plurality of control signals wherein each respective control signal of the plurality of controls signals is based on a respective threshold voltage of a respective transistor of the plurality of transistors;
selectively connecting a drain terminal of each transistor of the plurality of transistors directly to a first output voltage terminal of the amplifier circuit or directly to a second output voltage terminal of the amplifier circuit via a respective output chopper circuit of a plurality of output chopper circuits that is controlled based on the value of the respective control signal;
connecting the first and second input terminals to the first and second output voltage terminals via the input chopper circuit, the plurality of transistors, and the output chopper circuit based on the control signal; and
amplifying, by the plurality of transistors, the first input signal and the second input signal to generate a differential output of the amplifier circuit formed by the first and second output voltage terminals.