Patent · US Active

Variable gain amplifier utilizing positive feedback and time-domain calibration

US10284145B2 · kind B2 · utility

7Cited by

4References

20Claims

0Family size

Assignee

The Board of Regents of the University of Texas System · US

Inventors

Nan Sun · Beijing, CN
Miguel Gandara · San Jose, US

Key dates

Filing date	Nov 3, 2017
Grant date	May 7, 2019
Priority date	—
Expiry date	Nov 3, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH03M1/14
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A variable gain amplifier utilizing positive feedback and time-domain calibration includes an integration phase and a regeneration phase. A current source provides a bias current that increases linearity in the integration phase and reduces common-mode voltage dependence. The circuit includes a timing control loop, wherein a variable gain of a residue amplifier is proportional to a first time that a timing control loop signal is kept high, as determined by an on or off status of respectively paired inverter assemblies each having an input voltage determined by an amplifier output voltage during the regeneration phase. A strong-arm latch structure acts as a positive feedback latch until the first time is de-asserted.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.