US 12,445,100 B2
Chopper-stabilized amplifier
Cornel D. Stanescu, Bucharest (RO); and Adrian Constantin Veselu, Bucharest (RO)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed on Mar. 17, 2023, as Appl. No. 18/185,441.
Prior Publication US 2024/0313719 A1, Sep. 19, 2024
Int. Cl. G01R 19/00 (2006.01); H03F 3/393 (2006.01); H03F 3/45 (2006.01)
CPC H03F 3/393 (2013.01) [G01R 19/0023 (2013.01); H03F 3/45475 (2013.01); H03F 2203/45248 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A chopper-stabilized amplifier comprising:
a main amplifier including a primary input configured to receive an inner input signal from a first path and an auxiliary input configured to receive a compensation signal from a second path;
a first mux-interface circuit in the first path configured to limit the inner input signal received at the primary input of the main amplifier;
a chopper amplifier circuit in the second path configured to receive the inner input signal from the first path and to output the compensation signal to the auxiliary input;
a second mux-interface circuit in the second path configured to couple and decouple the chopper amplifier circuit to and from the first path; and
a slew-detector circuit coupled to the first path and configured to:
detect that the inner input signal is in a slew condition; and
transmit, in response to the detection, a slew signal to configure the second mux-interface circuit to decouple the second path from the first path while the inner input signal is in the slew condition.