公开(公告)号：US20230060318A1

公开(公告)日：2023-03-02

申请号：US17462868

申请日：2021-08-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tyler James Archer ,  Paul Gerard Damitio ,  Joel Martin Halbert ,  Bharath Karthik Vasan

IPC: H03F3/04

Abstract: Examples of amplifiers use current-replication transistors and a separation circuit coupled to such transistors to separate error current components from other current components in a pre-driver of an amplifier. In response to driving the current-replication transistors with the separated error current components, replica base current components that approximate error-modulation components of the pre-driver base currents are generated. Replica-current subtraction circuitry coupled to the current-replication transistors then subtract the replica base current components from the pre-driver base currents, affecting cancellation of the error-modulation components of the pre-driver base currents.

公开(公告)号：US11722104B2

公开(公告)日：2023-08-08

申请号：US17462868

申请日：2021-08-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tyler James Archer ,  Paul Gerard Damitio ,  Joel Martin Halbert ,  Bharath Karthik Vasan

IPC: H03F3/04 ,  H03F3/26

CPC classification number: H03F3/04

Abstract: Examples of amplifiers use current-replication transistors and a separation circuit coupled to such transistors to separate error current components from other current components in a pre-driver of an amplifier. In response to driving the current-replication transistors with the separated error current components, replica base current components that approximate error-modulation components of the pre-driver base currents are generated. Replica-current subtraction circuitry coupled to the current-replication transistors then subtract the replica base current components from the pre-driver base currents, affecting cancellation of the error-modulation components of the pre-driver base currents.