Capacitive feedback circuit
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United States of America Patent
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-
May 19, 2009
Grant Date -
Jan 19, 2006
app pub date -
Jun 25, 2003
filing date -
Jul 16, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved capacitive feedback circuit (20) comprises a feedback capacitor (23) having its output terminal connected to a high-impedance node (N). More particularly, the improved capacitive feedback circuit comprises a first branch (24) having a bias current source (25), an amplifying element (26), and a current sensor (27) connected in series, the amplifying element having a high-impedance control terminal (26c). The feedback capacitor (23) has its output terminal connected to said control terminal (26c). A current-to-voltage converting feedback loop (28) has a high-impedance output terminal (28c) connected to said feedback capacitor output terminal.
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