公开(公告)号：US20240313719A1

公开(公告)日：2024-09-19

申请号：US18185441

申请日：2023-03-17

Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Inventor： Cornel D. STANESCU ,  Adrian Constantin VESELU

IPC: H03F3/393 ,  G01R19/00 ,  H03F3/45

CPC classification number: H03F3/393 ,  G01R19/0023 ,  H03F3/45475 ,  H03F2203/45248

Abstract: A high-voltage chopper-stabilized amplifier can include two paths to compensate for non-ideal electrical parameters. A first path, leading to a primary input of the amplifier, may include a first mux interface circuit to limit voltages at the primary input of the amplifier. A second path, leading to an auxiliary input of the amplifier, may include a chopper amplifier circuit. Despite the first mux interface circuit, a slew condition on the first path may excite a current in the second path that can negatively affect the signal source. Accordingly, the disclosed amplifier further includes a second mux interface circuit that can decouple the second path while a slew condition. The second mux interface circuit is driven by a window floating comparator, which is supplied according to the voltages on primary input. A settling enhancer circuit keeps, during slew condition, certain nodes on the second path at a reference voltage.