公开(公告)号：US20200212921A1

公开(公告)日：2020-07-02

申请号：US16234685

申请日：2018-12-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sai Aditya KrishnaSwamy NURANI ,  Arun MOHAN ,  Shagun DUSAD ,  Neeraj SHRIVASTAVA

IPC: H03M1/06 ,  H03F1/32 ,  H03F3/45

Abstract: A top-plate sampling analog-to-digital converter (ADC) circuit includes a first ADC stage and a residue amplifier coupled to the first ADC stage. The residue amplifier comprises a first transistor with a control terminal, a first current terminal, and a second current terminal. The residue amplifier also comprises a second transistor with a control terminal, a first current terminal, and a second current terminal. The residue amplifier also comprises a linearity adjustment circuit coupled to a second current terminal of at least one of the first transistor and the second transistor. The linearity adjustment circuit comprises at least one switch that changes its state as a function of an input sampling phase and a gain phase of the residue amplifier.