WO2002080353A3 - Capacitive power driver circuit - Google Patents

Capacitive power driver circuit Download PDF

Info

Publication number
WO2002080353A3
WO2002080353A3 PCT/GB2002/001473 GB0201473W WO02080353A3 WO 2002080353 A3 WO2002080353 A3 WO 2002080353A3 GB 0201473 W GB0201473 W GB 0201473W WO 02080353 A3 WO02080353 A3 WO 02080353A3
Authority
WO
WIPO (PCT)
Prior art keywords
load
driver circuit
circuit
output signal
charging
Prior art date
Application number
PCT/GB2002/001473
Other languages
French (fr)
Other versions
WO2002080353A2 (en
Inventor
Anthony Hooley
Paul Raymond Windle
Original Assignee
1 Ltd
Anthony Hooley
Paul Raymond Windle
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
Application filed by 1 Ltd, Anthony Hooley, Paul Raymond Windle filed Critical 1 Ltd
Priority to GB0323977A priority Critical patent/GB2395385B/en
Publication of WO2002080353A2 publication Critical patent/WO2002080353A2/en
Publication of WO2002080353A3 publication Critical patent/WO2002080353A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Amplifiers (AREA)

Abstract

A capacitive power driver circuit (1) for driving an output signal on a capacitive load (2) in accordance with an input signal. The output signal may be the voltage across the load (2) or the charge stored on the load. The driver circuit (1) comprises a bridge arrangement of switchable current paths which constitute a bipolar charging circuit for charging the load (2) from a power supply unit (3) and a discharge circuit for discharging the load (2). An inductor (5) is provided in series with the load (2). The driver circuit (1) includes a detector (13) for detecting the output signal on the load (2) and current sensors (14, 15) for detecting the charging and discharge currents. A controller (12) controls switching of the charging circuit and the discharge circuit to drive the output signal in accordance with the input signal.
PCT/GB2002/001473 2001-03-30 2002-03-27 Capacitive power driver circuit WO2002080353A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0323977A GB2395385B (en) 2001-03-30 2002-03-27 Capacitive power driver circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0108076.1A GB0108076D0 (en) 2001-03-30 2001-03-30 Capacitive power driver circuit
GB0108076.1 2001-03-30

Publications (2)

Publication Number Publication Date
WO2002080353A2 WO2002080353A2 (en) 2002-10-10
WO2002080353A3 true WO2002080353A3 (en) 2002-12-19

Family

ID=9911961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/001473 WO2002080353A2 (en) 2001-03-30 2002-03-27 Capacitive power driver circuit

Country Status (2)

Country Link
GB (2) GB0108076D0 (en)
WO (1) WO2002080353A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2876516A1 (en) * 2004-10-11 2006-04-14 Thomson Licensing Sa AMPLIFIER FOR GENERATING A RECTANGULAR VOLTAGE SIGNAL WITH SWITCH SWITCHES ON A CAPACITIVE LOAD
FR2890500B1 (en) * 2005-09-07 2008-04-04 Vincent Jean Sebastie Tamisier DEVICE FOR AMPLIFYING A VOLTAGE REPRESENTATIVE OF AUDIOPHONIC INFORMATION
CN114113748B (en) * 2021-11-23 2024-04-12 上海挚达科技发展股份有限公司 Charging detection device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4628275A (en) * 1985-07-29 1986-12-09 Rockwell International Corporation Efficient power amplifier for high capacitive devices
WO2000072627A2 (en) * 1999-05-19 2000-11-30 New Transducers Limited Transducer driver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4628275A (en) * 1985-07-29 1986-12-09 Rockwell International Corporation Efficient power amplifier for high capacitive devices
WO2000072627A2 (en) * 1999-05-19 2000-11-30 New Transducers Limited Transducer driver

Also Published As

Publication number Publication date
GB2395385A (en) 2004-05-19
GB2395385B (en) 2005-01-05
GB0108076D0 (en) 2001-05-23
GB0323977D0 (en) 2003-11-19
WO2002080353A2 (en) 2002-10-10

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