US 12,445,097 B2
Amplifier circuitry
Charles W. Eno, Austin, TX (US); and Chandra B. Prakash, Austin, TX (US)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on May 23, 2022, as Appl. No. 17/751,011.
Claims priority of provisional application 63/275,994, filed on Nov. 5, 2021.
Prior Publication US 2023/0147195 A1, May 11, 2023
Int. Cl. H03F 3/217 (2006.01); H03F 3/213 (2006.01); H03F 3/45 (2006.01); H03K 7/08 (2006.01)
CPC H03F 3/2173 (2013.01) [H03F 3/213 (2013.01); H03F 3/45 (2013.01); H03K 7/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. Integrated circuitry implementing amplifier circuitry, the integrated circuity comprising first amplifier circuitry and second amplifier circuitry, the first and second amplifier circuitry being configurable as first and second single-ended amplifiers or as a differential amplifier,
wherein the first amplifier circuitry comprises:
a first input stage;
a first half-bridge output stage having an output coupled to a first output terminal of the integrated circuitry;
a first feedback path coupling a first input of the first input stage to a first sense terminal of the first amplifier circuitry;
a second feedback path coupling a second input of the first input stage to a second sense terminal of the first amplifier circuitry; and
a first shunt resistor coupling the output of the first half-bridge output stage to the first feedback path,
wherein the second amplifier circuitry comprises:
a second input stage; and
a second half-bridge output stage having an output coupled to a second output terminal of the integrated circuitry,
and wherein the first amplifier circuitry further comprises a second shunt resistor coupling the second feedback path to a dedicated shunt resistor terminal of the integrated circuitry, such that the second shunt resistor is directly accessible from outside the integrated circuitry.