Patent · US Active

Time-domain incremental two-step capacitance-to-digital converter

US11569826B2 · kind B2 · utility

3Cited by

4References

20Claims

0Family size

Assignee

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

Inventors

Xiyuan Tang · Austin, US
Nan Sun · Beijing, CN

Key dates

Filing date	Feb 16, 2021
Grant date	Jan 31, 2023
Priority date	—
Expiry date	Feb 16, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH03M3/458
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

An exemplary incremental two-step capacitance-to-digital converter (CDC) with a time-domain sigma-delta modulator (TDΔΣM) includes a voltage-controlled oscillator (VCO)-based integrator that can be used in a low-order loop configuration. Example prototypes are disclosed, which when fabricated in 40-nm CMOS technology, provides CDC resolution of 0.29 fF while dissipating only 0.083 nJ per conversion.

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