GB1490226A - Transistor signal gating networks - Google Patents

Transistor signal gating networks

Info

Publication number
GB1490226A
GB1490226A GB52572/74A GB5257274A GB1490226A GB 1490226 A GB1490226 A GB 1490226A GB 52572/74 A GB52572/74 A GB 52572/74A GB 5257274 A GB5257274 A GB 5257274A GB 1490226 A GB1490226 A GB 1490226A
Authority
GB
United Kingdom
Prior art keywords
transistor
stage
signal
base
collector
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
GB52572/74A
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19732361430 external-priority patent/DE2361430C3/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1490226A publication Critical patent/GB1490226A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Electronic Switches (AREA)

Abstract

1490226 Transistor signal gating circuits SIEMENS AG 5 Dec 1974 [10 Dec 1973] 52572/74 Heading H3T In a transistor signal gating circuit in which a common input E is connected to outputs Al- An via output arms 1-n each comprising a two-stage A.C. signal amplifier with a common base transistor input stage TS1 and a common collector transistor output stage TS2, the emitter-collector path of the transistors TS1 and TS2 is connected in a series D.C. path between two supply voltage terminals, the base of each transistor TS1 is connected via a respective choke D1 to the emitter of a further common collector transistor stage TS3 which serves to maintain the potential at the base of each transistor TS1 constant and a respective control terminal St1-Stn is connected to the collector of each transistor TS2 to enable or disable the associated signal arm 1-n. Earth potential is applied to the relevant control terminal St1-Stn to enable a signal to pass the associated arm 1-n. When an output arm is blocked by removal of the earth potential from the control terminal the output transistor TS2 turns off but the emitter current of the associated input transistor TS 1 is practically unchanged due to the transistor TS3 which keeps the base voltage of TS1 constant. The transistor TS1 is saturated and therefore no longer has an amplifying function. As the emitter current is maintained the input impedance of the amplifier remains virtually unaltered.
GB52572/74A 1973-12-10 1974-12-05 Transistor signal gating networks Expired GB1490226A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732361430 DE2361430C3 (en) 1973-12-10 Branch switch

Publications (1)

Publication Number Publication Date
GB1490226A true GB1490226A (en) 1977-10-26

Family

ID=5900368

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52572/74A Expired GB1490226A (en) 1973-12-10 1974-12-05 Transistor signal gating networks

Country Status (9)

Country Link
JP (1) JPS5412377B2 (en)
AT (1) AT342664B (en)
BE (1) BE823173A (en)
FR (1) FR2254158B1 (en)
GB (1) GB1490226A (en)
IN (1) IN142329B (en)
IT (1) IT1026924B (en)
NL (1) NL160447C (en)
SE (1) SE395808B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161046A (en) * 1984-06-25 1986-01-02 Raytheon Co Transmit/receive switching arrangement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873600U (en) * 1981-11-13 1983-05-18 タカラベルモント株式会社 X-ray device
FR2608862A1 (en) * 1986-12-19 1988-06-24 Radiotechnique Ind & Comm VERY HIGH FREQUENCY ELECTRONIC SWITCH
FI100751B (en) * 1996-06-11 1998-02-13 Nikolay Tchamov Amplifier with low noise

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161046A (en) * 1984-06-25 1986-01-02 Raytheon Co Transmit/receive switching arrangement
US4637073A (en) * 1984-06-25 1987-01-13 Raytheon Company Transmit/receive switch

Also Published As

Publication number Publication date
NL160447C (en) 1979-10-15
SE7415458L (en) 1975-06-11
DE2361430B2 (en) 1976-01-29
FR2254158B1 (en) 1978-03-24
NL160447B (en) 1979-05-15
SE395808B (en) 1977-08-22
AT342664B (en) 1978-04-10
JPS50114958A (en) 1975-09-09
IT1026924B (en) 1978-10-20
IN142329B (en) 1977-06-25
ATA986074A (en) 1977-08-15
BE823173A (en) 1975-06-10
NL7416094A (en) 1975-06-12
FR2254158A1 (en) 1975-07-04
DE2361430A1 (en) 1975-06-19
JPS5412377B2 (en) 1979-05-22
AU7623374A (en) 1976-06-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee