GB2212351A - Amplifier for low h.t.voltage and low quiescent current drain - Google Patents

Amplifier for low h.t.voltage and low quiescent current drain

Info

Publication number
GB2212351A
GB2212351A GB8902973A GB8902973A GB2212351A GB 2212351 A GB2212351 A GB 2212351A GB 8902973 A GB8902973 A GB 8902973A GB 8902973 A GB8902973 A GB 8902973A GB 2212351 A GB2212351 A GB 2212351A
Authority
GB
United Kingdom
Prior art keywords
low
voltage
quiescent current
section
amplifier
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB8902973A
Other versions
GB8902973D0 (en
GB2212351B (en
Inventor
Francis Whitmore Adkin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB8902973D0 publication Critical patent/GB8902973D0/en
Publication of GB2212351A publication Critical patent/GB2212351A/en
Application granted granted Critical
Publication of GB2212351B publication Critical patent/GB2212351B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/307—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in push-pull amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

Amplifier circuit arranged for low H.T. voltage operation across a wide voltage range, and for low quiescent current drain. The amplifier circuit comprises a biasing circuit (section 1) advantageously arranged to give a stable quiescent current and optimised for low H.T. voltage and variation in H.T. voltage. This biases a split phase amplifier stage (section 2), which is also advantageously optimised for this operation. Signal input (section 4) and output stages (section 3) are also included.
GB8902973A 1986-08-20 1989-02-10 Amplifier for low h.t.voltage and low quiescent current drain Expired - Lifetime GB2212351B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868620206A GB8620206D0 (en) 1986-08-20 1986-08-20 Amplifier
PCT/GB1987/000586 WO1988001452A1 (en) 1986-08-20 1987-08-20 Amplifier for low h.t. voltage and low quiescent current drain

Publications (3)

Publication Number Publication Date
GB8902973D0 GB8902973D0 (en) 1989-04-05
GB2212351A true GB2212351A (en) 1989-07-19
GB2212351B GB2212351B (en) 1991-06-05

Family

ID=10602944

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868620206A Pending GB8620206D0 (en) 1986-08-20 1986-08-20 Amplifier
GB8902973A Expired - Lifetime GB2212351B (en) 1986-08-20 1989-02-10 Amplifier for low h.t.voltage and low quiescent current drain

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868620206A Pending GB8620206D0 (en) 1986-08-20 1986-08-20 Amplifier

Country Status (3)

Country Link
AU (1) AU7808487A (en)
GB (2) GB8620206D0 (en)
WO (1) WO1988001452A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB880475A (en) * 1957-02-09 1961-10-25 John Somerset Murray Transistor amplifier providing a balanced output signal
US3324406A (en) * 1964-05-20 1967-06-06 Univ Oklahoma State Power conserving biasing system for a class b push-pull transistor amplifier circuit
US3531728A (en) * 1968-12-24 1970-09-29 Narco Scientific Ind Bias regulated push-pull amplifier
US4130725A (en) * 1976-12-02 1978-12-19 Tenna Corporation Split-coil speaker with direct coupling
WO1983001714A1 (en) * 1981-11-10 1983-05-11 Francis Whitmore Adkin Amplifier suitable for low supply voltage operation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB880475A (en) * 1957-02-09 1961-10-25 John Somerset Murray Transistor amplifier providing a balanced output signal
US3324406A (en) * 1964-05-20 1967-06-06 Univ Oklahoma State Power conserving biasing system for a class b push-pull transistor amplifier circuit
US3531728A (en) * 1968-12-24 1970-09-29 Narco Scientific Ind Bias regulated push-pull amplifier
US4130725A (en) * 1976-12-02 1978-12-19 Tenna Corporation Split-coil speaker with direct coupling
WO1983001714A1 (en) * 1981-11-10 1983-05-11 Francis Whitmore Adkin Amplifier suitable for low supply voltage operation

Also Published As

Publication number Publication date
GB8620206D0 (en) 1986-10-01
WO1988001452A1 (en) 1988-02-25
AU7808487A (en) 1988-03-08
GB8902973D0 (en) 1989-04-05
GB2212351B (en) 1991-06-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980820