Transconductance circuit for piezoelectric transducer
US7042134B2 · kind B2 · utility
13Cited by
6References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2004 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Oct 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/181
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.