Invention Grant
- Patent Title: Control of base currents for output driver transistors in amplifiers
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Application No.: US17462930Application Date: 2021-08-31
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Publication No.: US11764740B2Publication Date: 2023-09-19
- Inventor: Tyler James Archer , Joel Martin Halbert , Bharath Karthik Vasan
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Frank D. Cimino
- Main IPC: H03F3/04
- IPC: H03F3/04 ; H03F3/26

Abstract:
Examples of amplifiers accurately generate control currents for control terminals of output drivers using current-replication transistors and current mirrors. An input terminal of a first current mirror is coupled to the control terminal of a first current-replication transistor, and an input terminal of a second current mirror is coupled to the control terminal of a second current-replication transistor. The output terminals of the first and second current mirrors are coupled to the control terminals of first and second output drivers, respectively. First and second intermediate currents indicative of first and second currents flowing to the first and second output driver elements, respectively, are generated. Using the first and second current mirrors, first and second control currents are generated to control the first and second output driver elements, respectively, by scaling the first and second intermediate currents according to the gain factors of the current mirrors.
Public/Granted literature
- US20230069204A1 CONTROL OF BASE CURRENTS FOR OUTPUT DRIVER TRANSISTORS IN AMPLIFIERS Public/Granted day:2023-03-02
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