GB1114050A - Overload protection arrangement in a multi-stage transistorised amplifier - Google Patents

Overload protection arrangement in a multi-stage transistorised amplifier

Info

Publication number
GB1114050A
GB1114050A GB5539865A GB5539865A GB1114050A GB 1114050 A GB1114050 A GB 1114050A GB 5539865 A GB5539865 A GB 5539865A GB 5539865 A GB5539865 A GB 5539865A GB 1114050 A GB1114050 A GB 1114050A
Authority
GB
United Kingdom
Prior art keywords
diode
transistor
amplifier
line
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
GB5539865A
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.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
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 Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1114050A publication Critical patent/GB1114050A/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
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/02—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

1,114,050. Transistor amplifying circuits. TELEFUNKEN PATENTVERWERTONGS G.m.b.H. 31 Dec., 1965 [23 Jan., 1965], No. 55398/65. Headings H3T and H4R. A multistage transistor amplifier is protected against surges at its input or output by means of diodes D 1 , D 5 of low barrier-layer capacitance, the diode D 1 being connected between the base of the input transistor TS 1 and the earth line and the diode D 5 between the collector of the output transistor TS 2 and earth line, both diodes being biased in the non-conductive direction. In addition, there is connected across the second diode a further diode D 7 of low barrier-layer capacitance in series with, but opposition to, a voltage stabilizing e.g. Zener diode D 6 so poled as to be biased in the backward direction. The arrangement is more particularly intended for use with carrier frequency line amplifiers operated by means of D.C. sent over the line (Fig. 1, not shown), in which case protection may be improved by dividing any equalization into two networks VE, NE connected respectively before and after the amplifier.
GB5539865A 1965-01-23 1965-12-31 Overload protection arrangement in a multi-stage transistorised amplifier Expired GB1114050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET27879A DE1221291B (en) 1965-01-23 1965-01-23 Overload protection device for multi-stage transistorized amplifiers, especially for carrier frequency line amplifiers

Publications (1)

Publication Number Publication Date
GB1114050A true GB1114050A (en) 1968-05-15

Family

ID=7553776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5539865A Expired GB1114050A (en) 1965-01-23 1965-12-31 Overload protection arrangement in a multi-stage transistorised amplifier

Country Status (4)

Country Link
DE (1) DE1221291B (en)
FR (1) FR1464209A (en)
GB (1) GB1114050A (en)
SE (1) SE316508B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2638177C2 (en) * 1976-08-25 1985-10-24 Robert Bosch Gmbh, 7000 Stuttgart Protection device against voltage reversal and overvoltages for a semiconductor circuit
DE3043795C2 (en) * 1980-11-20 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Overvoltage protection circuit
DE3306596C2 (en) * 1983-02-25 1985-03-07 Rohde & Schwarz GmbH & Co KG, 8000 München Circuit for protecting the input transistor of a high-frequency amplifier from overvoltages

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655609A (en) * 1952-07-22 1953-10-13 Bell Telephone Labor Inc Bistable circuits, including transistors
FR1243782A (en) * 1958-12-31 1960-10-14 Siemens Ag Transistor circuit for the transmission of a DC voltage of any polarity
NL252093A (en) * 1959-06-02
DE1092960B (en) * 1959-11-06 1960-11-17 Telefunken Gmbh Protection circuit against overvoltages in output stages of transistor power amplifiers

Also Published As

Publication number Publication date
DE1221291B (en) 1966-07-21
SE316508B (en) 1969-10-27
FR1464209A (en) 1966-12-30

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