US 12,422,474 B2
Force/measure current gain trimming
Tanmay Neema, Bangalore (IN); Kanak Das, Bangalore (IN); Rajavelu Thinakaran, Bangalore (IN); and Gautam Nandi, Bangalore (IN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Sep. 29, 2023, as Appl. No. 18/478,038.
Claims priority of application No. 202341025721 (IN), filed on Apr. 5, 2023.
Prior Publication US 2024/0337686 A1, Oct. 10, 2024
Int. Cl. G01R 31/28 (2006.01); H03F 3/45 (2006.01); H03M 1/66 (2006.01)
CPC G01R 31/2879 (2013.01) [G01R 31/2889 (2013.01); H03F 3/45475 (2013.01); H03M 1/662 (2013.01); H03F 2200/261 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuit, comprising:
a force amplifier having a first input, a second input, and an output;
a resistor array having a first terminal coupled to the output of the force amplifier, a second terminal, and a control terminal;
a digital to analog converter (DAC) having a first input, an output coupled to the first input of the force amplifier, and a gain selection input;
a current sensing amplifier having a first input coupled to the first terminal of the resistor array, a second input coupled to the second terminal of the resistor array, an output coupled to the second input of the force amplifier, and a gain selection input; and
a gain selection circuit having a control terminal coupled to the control terminal of the resistor array, and an output coupled to the gain selection input of the current sensing amplifier.