GB1527293A - Composite collector load for class a semiconductor amplifier - Google Patents

Composite collector load for class a semiconductor amplifier

Info

Publication number
GB1527293A
GB1527293A GB1646776A GB1646776A GB1527293A GB 1527293 A GB1527293 A GB 1527293A GB 1646776 A GB1646776 A GB 1646776A GB 1646776 A GB1646776 A GB 1646776A GB 1527293 A GB1527293 A GB 1527293A
Authority
GB
United Kingdom
Prior art keywords
transistor
load
class
collector load
april
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.)
Expired
Application number
GB1646776A
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.)
GARWELL K
Original Assignee
GARWELL K
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 GARWELL K filed Critical GARWELL K
Priority to GB1646776A priority Critical patent/GB1527293A/en
Publication of GB1527293A publication Critical patent/GB1527293A/en
Expired 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0261—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A
    • 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/22—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively

Landscapes

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

Abstract

1527293 Transistor amplifiers K GARWELL 21 April 1977 [23 April 1976] 16467/76 Heading H3T The efficiency of a class A transistor amplifier TR1 is increased by providing a second transistor TR2 as collector load together with a switching- diode D connected between the transistors. With a negative going input signal the rising collector voltage of TR1 blocks diode D2 and current flows into the load ZL through transistor TR2. With a positive going input signal, TR2 turns off and current flows from load ZL through D and TRI. Since the output current does not flow through resistor R, this resistor can be larger than if it forms the whole collector load and less power is wasted. A detailed circuit of an audio amplifier incorporating the invention is described, Fig. 5 (not shown).
GB1646776A 1977-04-21 1977-04-21 Composite collector load for class a semiconductor amplifier Expired GB1527293A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1646776A GB1527293A (en) 1977-04-21 1977-04-21 Composite collector load for class a semiconductor amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1646776A GB1527293A (en) 1977-04-21 1977-04-21 Composite collector load for class a semiconductor amplifier

Publications (1)

Publication Number Publication Date
GB1527293A true GB1527293A (en) 1978-10-04

Family

ID=10077872

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1646776A Expired GB1527293A (en) 1977-04-21 1977-04-21 Composite collector load for class a semiconductor amplifier

Country Status (1)

Country Link
GB (1) GB1527293A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2456431A1 (en) * 1979-05-10 1980-12-05 Philips Nv AMPLIFIER FOR USE IN A SUBSCRIBER LINE CIRCUIT
FR2458183A1 (en) * 1979-05-28 1980-12-26 Philips Nv DEVICE FOR PROVIDING SIGNALS TO A TELEPHONE LINE
EP0021509A1 (en) * 1979-06-25 1981-01-07 Telecommunications Radioelectriques Et Telephoniques T.R.T. Electronic subscriber connector
GB2334841A (en) * 1998-02-27 1999-09-01 Clive William Warder Read Class A audio amplifier with current sink controlled by feedback in dependence on speaker current
GR1008934B (en) * 2016-04-25 2017-01-24 Κωνσταντινος Γεωργιου Παπαχρηστου Electronic arrangement for the automatic regulation of current polarisation in transistors of single-supply audio amplifiers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2456431A1 (en) * 1979-05-10 1980-12-05 Philips Nv AMPLIFIER FOR USE IN A SUBSCRIBER LINE CIRCUIT
FR2458183A1 (en) * 1979-05-28 1980-12-26 Philips Nv DEVICE FOR PROVIDING SIGNALS TO A TELEPHONE LINE
EP0021509A1 (en) * 1979-06-25 1981-01-07 Telecommunications Radioelectriques Et Telephoniques T.R.T. Electronic subscriber connector
FR2460078A1 (en) * 1979-06-25 1981-01-16 Trt Telecom Radio Electr ELECTRONIC SUBSCRIBER JUNCTION
GB2334841A (en) * 1998-02-27 1999-09-01 Clive William Warder Read Class A audio amplifier with current sink controlled by feedback in dependence on speaker current
GB2334841B (en) * 1998-02-27 2002-11-20 Clive William Warder Read Power amplifier
GR1008934B (en) * 2016-04-25 2017-01-24 Κωνσταντινος Γεωργιου Παπαχρηστου Electronic arrangement for the automatic regulation of current polarisation in transistors of single-supply audio amplifiers

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Legal Events

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