US 11,723,122 B2
Dynamic driver voltage headroom adjustment
Jiana Lou, Shanghai (CN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Mar. 12, 2021, as Appl. No. 17/200,140.
Application 17/200,140 is a continuation of application No. 16/690,778, filed on Nov. 21, 2019, granted, now 10,986,708.
Application 16/690,778 is a continuation of application No. PCT/CN2019/092305, filed on Jun. 21, 2019.
Prior Publication US 2021/0204373 A1, Jul. 1, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H05B 45/10 (2020.01); H03M 1/68 (2006.01); H05B 45/37 (2020.01)
CPC H05B 45/10 (2020.01) [H03M 1/68 (2013.01); H05B 45/37 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving, by a driver, a first control signal, wherein the driver includes a power regulator having a regulator output, and the driver further including current sources, each current source having a respective current source input coupled to the regulator output;
receiving, by the driver, a second control signal;
in response to the driver determining that the second control signal has a first value, instructing a digital-to-analog converter (DAC) to produce a current with a first voltage headroom (VHR) value, responsive to the first control signal and a reference current; and
in response to the driver determining that the second control signal has a second value, instructing the DAC to produce the current with a second VHR value.