US 12,456,956 B2
Chopper stabilized amplifier
Atsushi Namai, Kawasaki Kanagawa (JP); and Hironori Nagasawa, Yokohama Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed by Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed on Aug. 18, 2022, as Appl. No. 17/890,856.
Claims priority of application No. 2022-009632 (JP), filed on Jan. 25, 2022.
Prior Publication US 2023/0238928 A1, Jul. 27, 2023
Int. Cl. H03F 3/393 (2006.01)
CPC H03F 3/393 (2013.01) 12 Claims
OG exemplary drawing
 
1. A chopper stabilized amplifier comprising:
an input unit configured to receive a differential input signal at a first input terminal and a second input terminal;
a first chopper configured to modulate the differential input signal based on a first control complementary signals of the first control signal;
a first amplifier configured to amplify signals with a modulated differential output from the first chopper; and
a switch circuit provided between the input unit and the first chopper to receive a second control signal, configured to control an input current which flows in the first chopper and reduce the input current which flows in the first chopper when the first chopper performs a modulating operation, by using an operation with the second control signal, wherein a transition time of the second control signal, whose state changes from on to off or from off to on, is set to overlap the transition time of the first control signal and a complementary signal of the first control signal.