公开(公告)号：US20190214953A1

公开(公告)日：2019-07-11

申请号：US16352575

申请日：2019-03-13

Applicant: Zaw Soe ,  Kevin Jing ,  Steve Gao

Inventor： Zaw Soe ,  Kevin Jing ,  Steve Gao

IPC: H03G1/00 ,  H03F3/45 ,  H03H11/12 ,  H03G5/28

Abstract: A circuit comprises a Sallen-Key filter, which includes a source follower that implements a unity-gain amplifier; and a programmable-gain amplifier coupled to the Sallen-Key filter. The circuit enables programmable gain via adjustment to a current mirror copying ratio in the programmable-gain amplifier, which decouples the bandwidth of the circuit from its gain settings. The programmable-gain amplifier can comprise a differential voltage-to-current converter, a current mirror pair, and programmable output gain stages. The Sallen-Key filter and at least one branch in the programmable-gain amplifier can comprise transistors arranged in identical circuit configurations.