公开(公告)号：US10897262B2

公开(公告)日：2021-01-19

申请号：US15620770

申请日：2017-06-12

Applicant: Texas Instruments Incorporated

Inventor： Akhilesh Kesavanunnithan ,  Sharat Chandra Rudrasamudram ,  Henry Manoj D'Souza ,  Vivek Varier

IPC: H03M1/06 ,  H03M1/10 ,  H03M1/12

Abstract: Methods and apparatus for determining non-linearity in analog-to-digital converters are disclosed. An example apparatus includes a signal interface to receive an output of an analog-to-digital converter (ADC), the output corresponding to a periodic signal transmitted to the ADC; a signal transformer to determine at least one of a harmonic phase or a harmonic amplitude corresponding to the output; and an integral non-linearity (INL) term calculator to determine the INL of the ADC based on a characteristic of the periodic signal and the at least one of the harmonic phase or the harmonic amplitude.

公开(公告)号：US20230353100A1

公开(公告)日：2023-11-02

申请号：US17732385

申请日：2022-04-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivek Varier ,  Srinivas Pulijala ,  Vadim Ivanov ,  Jerry Doorenbos

IPC: H03F3/16 ,  H03F1/30

CPC classification number: H03F1/301 ,  H03F3/16 ,  H03F2200/447

Abstract: An example apparatus includes: An amplifier comprising folded cascode circuitry having an input and an output, an input pair coupled to the input, clamp circuitry including: a first transistor having a first drain, a first source, and a first gate, the first source coupled to the output, a second transistor having a second drain, a second source, and a second gate, the second drain coupled to the first drain and the second gate coupled to the first drain and second drain, a third transistor having a third drain, a third source, and a third gate, the third source coupled to the output, and a fourth transistor having a fourth drain, a fourth source, and a fourth gate, the fourth drain coupled to the third drain and the fourth gate coupled to the third drain and the fourth drain.