Patent · US Active

Low power small area oscillator-based ADC

US9903892B2 · kind B2 · utility

4Cited by

8References

27Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Chuang Zhang · Fort Collins, US
Nan Chen · San Diego, US
Junmou Zhang · Los Angeles, US

Key dates

Filing date	Sep 8, 2014
Grant date	Feb 27, 2018
Priority date	—
Expiry date	Feb 9, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH03M1/60
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

In one embodiment, a method for measuring current comprises generating a sensor current based on a current being measured. The method also comprises converting a combined current into a first frequency, wherein the combined current is a sum of the sensor current and a common-mode current, and converting the first frequency into a first count value. The method further comprises converting the common-mode current into a second frequency, converting the second frequency into a second count value, and subtracting the second count value from the first count value to obtain a current reading.

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