US 11,811,372 B2
Instrumentation amplifier and related apparatus
Jussi Matti Aleksi Särkkä, Oulunsalo (FI)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Oct. 9, 2020, as Appl. No. 17/067,299.
Claims priority of provisional application 62/914,338, filed on Oct. 11, 2019.
Prior Publication US 2021/0111681 A1, Apr. 15, 2021
Int. Cl. H03F 1/56 (2006.01); H03F 3/45 (2006.01); H02M 1/08 (2006.01); H03F 1/02 (2006.01); H02M 1/00 (2006.01)
CPC H03F 3/45179 (2013.01) [H02M 1/08 (2013.01); H03F 1/0216 (2013.01); H03F 1/56 (2013.01); H02M 1/0038 (2021.05)] 21 Claims
OG exemplary drawing
 
1. A system comprising:
a feedback network having a feedback output terminal;
a digital to analog converter (DAC) having an analog output terminal; and
an amplifier including:
an input differential pair having an inverting input terminal, a non-inverting input terminal, a first output current terminal and a second output current terminal, the inverting input terminal coupled to the feedback output terminal, and the non-inverting input terminal coupled to the analog output terminal;
a feedback differential pair having a third output current terminal, a fourth output current terminal, a first input terminal and a second input terminal, the third output current terminal coupled to the first output current terminal, and the fourth output current terminal coupled to the second output current terminal; and
an amplifier output terminal coupled to the first input terminal and the second input terminal.