GB1242248A - Electronic amplifier - Google Patents

Electronic amplifier

Info

Publication number
GB1242248A
GB1242248A GB4723868A GB4723868A GB1242248A GB 1242248 A GB1242248 A GB 1242248A GB 4723868 A GB4723868 A GB 4723868A GB 4723868 A GB4723868 A GB 4723868A GB 1242248 A GB1242248 A GB 1242248A
Authority
GB
United Kingdom
Prior art keywords
stage
output
semi
further stage
output stage
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
GB4723868A
Inventor
Lionel John Outram
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB4723868A priority Critical patent/GB1242248A/en
Publication of GB1242248A publication Critical patent/GB1242248A/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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/302—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in bipolar transistor amplifiers

Landscapes

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

Abstract

1,242,248. Transistor amplifying circuits STANDARD TELEPHONES & CABLES Ltd 4 Oct., 1968, No. 47238/68. Heading H3T. An electronic amplifier has a plurality of direct-coupled amplification stages each includ ing a semi-conductor device, including at least an output stage 12 and a further stage 15, the output stage 12 arranged to take minimum operating current from a power source and also being connected to the input of the further stage 15 which includes a semi-conductor device arranged to operate substantially saturated and also adapted to apply negligible load to the output stage and to produce a rectified signal in response to the output signal thereof, the output of the further stage 15 being connected to at least one of the semi-conductor devices so that the operating current of the output stage 12 increases in response to an increase in the output signal. In the embodiment the output of the further stage 15 is taken off via a potentiometer 20 and applied over resistor 10 to the input of the first stage 5, to which A.C. negative feedback is also applied from the output stage 12 via resistors 13, 14, 8 and capacitor 9. The temperature coefficient of the further stage 15 substantially compensates that of the other stages.
GB4723868A 1968-10-04 1968-10-04 Electronic amplifier Expired GB1242248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4723868A GB1242248A (en) 1968-10-04 1968-10-04 Electronic amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4723868A GB1242248A (en) 1968-10-04 1968-10-04 Electronic amplifier

Publications (1)

Publication Number Publication Date
GB1242248A true GB1242248A (en) 1971-08-11

Family

ID=10444264

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4723868A Expired GB1242248A (en) 1968-10-04 1968-10-04 Electronic amplifier

Country Status (1)

Country Link
GB (1) GB1242248A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128431A (en) * 1982-09-24 1984-04-26 Ates Componenti Elettron Improvements in or relating to audio power amplifiers with automatic adjustment of output stage bias current
US4531100A (en) * 1981-11-10 1985-07-23 Adkin Francis W Amplifier suitable for low supply voltage operation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531100A (en) * 1981-11-10 1985-07-23 Adkin Francis W Amplifier suitable for low supply voltage operation
GB2128431A (en) * 1982-09-24 1984-04-26 Ates Componenti Elettron Improvements in or relating to audio power amplifiers with automatic adjustment of output stage bias current

Similar Documents

Publication Publication Date Title
GB1101875A (en) Amplifier
GB1238950A (en)
GB1242248A (en) Electronic amplifier
GB1319363A (en) Signal converter circuits
GB812977A (en) Temperature-compensated transistor amplifier
GB1469990A (en) Gain control circuit
GB995879A (en) A signal amplifier
GB853672A (en) Improvements in or relating to transistor amplifiers
GB747695A (en) Improvements in or relating to amplifying circuits embodying transistors
GB1055411A (en) High input impedance direct-coupled transistor amplifier
US2942200A (en) High impedance transistor circuits
US3571625A (en) Pulse amplifier with positive feedback
GB909776A (en) A transistor amplifier with gain control
GB873564A (en) Circuit with transistors for wide-band amplification
GB740333A (en) Improvements in or relating to amplifying circuit arrangements comprising a plurality of transistors
GB758991A (en) Improvements in and relating to semi conductor amplifiers
GB845092A (en) Improvements in or relating to signal amplifier circuits employing transistors
GB975688A (en) Transistor amplifier circuits
GB771945A (en) Improvements in or relating to transistor amplifiers
GB1106279A (en) Improvements in or relating to cascade transistor amplifier arrangements in integrated circuit form
GB765398A (en) Improvements in or relating to transistor circuits having variable amplification
GB1084349A (en)
SU133495A1 (en) Semiconductor triode amplifier
GB915417A (en) Squelch circuit
GB1044461A (en) Improvements in and relating to transistor amplifiers