Patent · US Active

Noise canceling current mirror circuit for improved PSR

US9146574B2 · kind B2 · utility

0Cited by

4References

16Claims

0Family size

Assignee

STMicroelectronics International N.V. · NL

Inventors

Nitin Gupta · Savanuru, IN
Abhirup Lahiri · Dublin, IE

Key dates

Filing date	Mar 4, 2013
Grant date	Sep 29, 2015
Priority date	—
Expiry date	May 11, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG05F3/02
WIPO fieldControl
WIPO sectorInstruments

Abstract

A current mirror circuit provides a current to drive a load. A noise cancelling circuit is provided to keep the load current constant in spite of variations in the supply voltage. The noise cancelling circuit includes an auxiliary current path which branches from the load current path. The length-to-width ratios of transistors of the circuit are selected to provide the desired noise cancellation while maintaining device stability.

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