Patent · US Expired

Microphone with voltage pump

US7391873B2 · kind B2 · utility

11Cited by
11References
26Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 1, 2004
Grant dateJun 24, 2008
Priority date
Expiry dateApr 26, 2025

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04R25/407
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

An integrated circuit (102) configured to provide a microphone output signal, comprising: a preamplifier (108) coupled to receive an input signal, generated by a first microphone member that is movable relative to a second microphone member; and a voltage pump (104) to provide a bias voltage to either microphone member.

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