Patent · US Active

Reference signal generator circuit for an analog-to-digital converter of a microelectromechanical acoustic transducer, and corresponding method

US8217821B2 · kind B2 · utility

2Cited by

6References

18Claims

0Family size

Assignee

STMicroelectronics SA

Inventors

Filippo David · Milano, IT
Igino Padovani · Novate Milanese, IT

Key dates

Filing date	Jun 22, 2010
Grant date	Jul 10, 2012
Priority date	—
Expiry date	Jun 22, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG05F3/08
WIPO fieldControl
WIPO sectorInstruments

Abstract

A reference signal generator circuit for an analog-to-digital converter, the circuit having a signal-generation stage to generate a first reference signal on a first reference terminal, and a filtering circuit arranged between the generator stage and the analog-to-digital converter to determine a filtering of disturbance present on the first reference signal and supply at output on a second reference terminal a second filtered reference signal, the filtering circuit having a switching circuit to connect the first reference terminal to the second reference terminal directly during startup of the reference signal generator circuit and then through the filtering circuit once the startup step is terminated.

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