BRPI0509551A - transconductance circuit for piezoelectric transducer - Google Patents

transconductance circuit for piezoelectric transducer

Info

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
Application number
BRPI0509551-4A
Other languages
Portuguese (pt)
Inventor
Eric Scott Micko
Original Assignee
Suren Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/812,603 external-priority patent/US7042134B2/en
Application filed by Suren Systems Ltd filed Critical Suren Systems Ltd
Publication of BRPI0509551A publication Critical patent/BRPI0509551A/en

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Landscapes

  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

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).

BRPI0509551-4A 2004-03-30 2005-03-16 transconductance circuit for piezoelectric transducer BRPI0509551A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN1969401B (en) 2010-06-09
CN1969401A (en) 2007-05-23
RU2390882C2 (en) 2010-05-27
RU2006135801A (en) 2008-04-20

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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]