Transconductance circuit for piezoelectric transducer

Details Transconductance circuit for piezoelectric transducer Transconductance circuit for piezoelectric transducer

2006-05-09

2006-05-09

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S317000

Reexamination Certificate

active

07042134

ABSTRACT:
A transconductance monitoring and amplifying circuit for a piezoelectric transducer that may be used in, e.g., a motion detector system includes a FET, with the transducer (and, hence, the signal voltage reference) floating between the gate and source of the FET, as opposed to being connected to the common ground of the circuit. This permits the development of a larger detector signal and concomitantly the use of a relatively inexpensive FET instead of a relatively more expensive high impedance operational amplifier as must be used in conventional transconductance circuits.

REFERENCES:
patent: 6028491 (2000-02-01), Stanchak et al.
patent: 6340816 (2002-01-01), Micko
patent: 6448689 (2002-09-01), Satoh
patent: 6647764 (2003-11-01), Paul et al.
patent: 6741137 (2004-05-01), Sibrai et al.
patent: 6848299 (2005-02-01), Paul et al.
PerkinElmer Optoelectronics; “Elementorientation and Connections LHI 2068” Drawing No. 2/71197; May 14, 2001.

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