Inventor
TRUESDELL DAVID J
US6 patents
Patents
6 patentsUS6580797B1Jun 17, 2003
Amplifier circuit for electret microphone with enhanced performance
VXI CORP26 citations91
US6504937B1Jan 7, 2003
Amplifier circuit for electret microphone with enhanced performance
VXI CORP31 citations91
US6137879AOct 24, 2000
Computer telephony headset amplifier
VXI CORP30 citations90
US6681020B1Jan 20, 2004
Microphone circuit with mute and keep alive function
VXI CORP26 citations83
US6266424B1Jul 24, 2001
Electret microphone circuit with low battery disable
VXI CORP15 citations82
US6128384AOct 3, 2000
Self configuring telephone headset amplifier
VXI CORP12 citations72