公开(公告)号：US20210250036A1

公开(公告)日：2021-08-12

申请号：US17245592

申请日：2021-04-30

Applicant: STMicroelectronics International N.V.

Inventor： Anand KUMAR ,  Ramji GUPTA

IPC: H03M1/12

Abstract: A circuit includes an amplifier having first and second inputs and an output, and a feedback circuit configured to generate a feedback voltage in response to a voltage at the output of the amplifier. The feedback circuit is coupled to the first input of the amplifier to provide the feedback voltage to the first input of the amplifier. An output circuit is configured to generate a variable bias current in response to the voltage at the output of the amplifier. A switch circuit is configured to switch the second input of the amplifier from receiving a first reference voltage during a first mode of operation to receiving a second reference voltage during a second mode of operation.

公开(公告)号：US20220311439A1

公开(公告)日：2022-09-29

申请号：US17701870

申请日：2022-03-23

Applicant: STMicroelectronics International N.V.

Inventor： Ramji GUPTA ,  Anand KUMAR

IPC: H03K17/693 ,  H03K17/687 ,  H03K17/06 ,  H03K19/20

Abstract: A transmission gate circuit for use, for example, as a switching element of an analog multiplexer, includes an input configured to receive an input signal, an output and a control input configured to receive a switch control signal. A transmission gate switch is coupled between the input and the output. A level shifting circuit generates a level shifted switch control signal from the switch control signal, and applies that level shifted switch control signal to a control terminal of the transmission gate switch. The control terminal of the transmission gate switch can instead receive the switch control signal in situations where a voltage of the input signal is suitably high to support linear operation of the transmission gate switch.