Control of base currents for output driver transistors in amplifiers

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United States of America Patent

PATENT NO 11764740
APP PUB NO 20230069204A1
SERIAL NO

17462930

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
TEXAS INSTRUMENTS INCORPORATEDPO BOX 655474 MS 3999 DALLAS TX 75265

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Archer, Tyler James Tucson, US 5 0
Halbert, Joel Martin Tucson, US 11 10
Vasan, Bharath Karthik Tucson, US 14 3

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