The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 19, 2019
Filed:
Dec. 28, 2018
Texas Instruments Incorporated, Dallas, TX (US);
Raghu Nandan Srinivasa, Bengaluru, IN;
Srinivas Bangalore Seshadri, Bengaluru, IN;
Sabu Paul, Bengaluru, IN;
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
A pipelined analog-to-digital converter (ADC) and a residue amplifier used in the ADC. An ADC includes a capacitive digital-to-analog converter (CDAC), a residue amplifier, and a switched capacitor circuit. The residue amplifier is coupled to the CDAC. The residue amplifier includes a first complementary transistor pair and a first tail current circuit. The first complementary transistor pair is coupled to a first output of the CDAC, and includes a high-side transistor and a low-side transistor. The first tail current circuit is coupled to the high side transistor. The switched capacitor circuit is coupled to inputs of the CDAC and to the first tail current circuit. The switched capacitor circuit is configured to generate a voltage to bias the first tail current circuit with compensation for common mode voltage at the inputs of the CDAC.