BRPI0509551A - transconductance circuit for piezoelectric transducer - Google Patents
transconductance circuit for piezoelectric transducerInfo
- Publication number
- BRPI0509551A BRPI0509551A BRPI0509551-4A BRPI0509551A BRPI0509551A BR PI0509551 A BRPI0509551 A BR PI0509551A BR PI0509551 A BRPI0509551 A BR PI0509551A BR PI0509551 A BRPI0509551 A BR PI0509551A
- Authority
- BR
- Brazil
- Prior art keywords
- fet
- transducer
- circuit
- piezoelectric transducer
- transconductance
- Prior art date
Links
Abstract
CIRCUITO DE TRANSCONDUTáNCIA PARA TRANSDUTOR PIEZO-ELéTRICO.Um circuito de monitoramento e de amplificação de transcondutância para um transdutor piezo-elétrico (22, 28,34, 40) que poderá, por exemplo, ser utilizado em um sistema detector de movimento, inclui um FET (Ql), com o transdutor 22, 28, 34, 40) (e assim a referência de voltagem do sistema) flutuando entre o portal e a fonte do FET (Q1), em oposição a ser conectado ao terra comum do circuito.Isto permite o desenvolvimento de um sinal detector maior e, concomitanternente, a utilização do FET (Q1) relativamente barato em vez de um amplificador operacional de alta impedância e relativamente mais caro, como precisa ser utilizado nos circuitos de transcondutância convencionais, O FET (Ql) e o transdutor (22, 28, 34, 40) podem ser mantidos em um único pacote de quatro pinos (54).PIEZO-ELECTRICAL TRANSDUCER TRANSCRUCTURE CIRCUIT.A transconductance monitoring and amplification circuit for a piezoelectric transducer (22, 28,34, 40) which may, for example, be used in a motion detector system, includes a FET (Q1), with transducer 22, 28, 34, 40) (and thus the system voltage reference) floating between the portal and the FET (Q1) source as opposed to being connected to the common ground of the circuit. This allows for the development of a larger detector signal and, concomitantly, the use of relatively inexpensive FET (Q1) rather than a relatively more expensive high impedance operating amplifier as needs to be used in conventional transconductance circuits, O FET (Q1). ) and transducer (22, 28, 34, 40) can be kept in a single four-pin package (54).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/812,603 US7042134B2 (en) | 2003-03-31 | 2004-03-30 | Transconductance circuit for piezoelectric transducer |
PCT/US2005/008726 WO2005101538A2 (en) | 2003-03-31 | 2005-03-16 | Transconductance circuit for piezoelectric transducer |
Publications (1)
Publication Number | Publication Date |
---|---|
BRPI0509551A true BRPI0509551A (en) | 2007-09-18 |
Family
ID=38077170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0509551-4A BRPI0509551A (en) | 2004-03-30 | 2005-03-16 | transconductance circuit for piezoelectric transducer |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN1969401B (en) |
BR (1) | BRPI0509551A (en) |
RU (1) | RU2390882C2 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3141744B2 (en) * | 1995-08-31 | 2001-03-05 | 株式会社村田製作所 | Piezoelectric transformer |
US6028491A (en) * | 1998-04-29 | 2000-02-22 | Atmel Corporation | Crystal oscillator with controlled duty cycle |
GB9823410D0 (en) * | 1998-10-26 | 1998-12-23 | Smithkline Beecham Plc | Novel device |
-
2005
- 2005-03-16 BR BRPI0509551-4A patent/BRPI0509551A/en not_active Application Discontinuation
- 2005-03-16 CN CN2005800108689A patent/CN1969401B/en not_active Expired - Fee Related
- 2005-03-16 RU RU2006135801/28A patent/RU2390882C2/en active
Also Published As
Publication number | Publication date |
---|---|
CN1969401B (en) | 2010-06-09 |
RU2006135801A (en) | 2008-04-20 |
RU2390882C2 (en) | 2010-05-27 |
CN1969401A (en) | 2007-05-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B07A | Application suspended after technical examination (opinion) [chapter 7.1 patent gazette] | ||
B09B | Patent application refused [chapter 9.2 patent gazette] | ||
B09B | Patent application refused [chapter 9.2 patent gazette] |