GB916655A - Switching arrangements for television or like signals - Google Patents

Switching arrangements for television or like signals

Info

Publication number
GB916655A
GB916655A GB3686760A GB3686760A GB916655A GB 916655 A GB916655 A GB 916655A GB 3686760 A GB3686760 A GB 3686760A GB 3686760 A GB3686760 A GB 3686760A GB 916655 A GB916655 A GB 916655A
Authority
GB
United Kingdom
Prior art keywords
transistor
rectifier
input
switching
oct
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
GB3686760A
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.)
Robert Bosch Fernsehanlagen GmbH
Original Assignee
Fernseh 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 Fernseh GmbH filed Critical Fernseh GmbH
Publication of GB916655A publication Critical patent/GB916655A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching ac currents or voltages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/62—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors
    • H03K17/6221—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors combined with selecting means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/268—Signal distribution or switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

916,655. Transistor circuits. FERNSCH G.m.b.H. Oct. 27, 1960 [Oct. 27, 1959], No. 36867/60. Class 40(6). [Also in Group XXXVI] A switching circuit comprises a transistor and a rectifier connected in cascade and arranged so that both devices can be cut-off or rendered conductive at the same time by a voltage applied to the transistor. In Fig. 2, transistor T11 and rectifier D11 normally provide a conductive path between input terminal P111 and output terminal P117. This circuit is broken when switch SW111 is throw to the other position, biasing off transistor T11 and hence rectifier D11. This arrangement minimizes cross-talk in the cut-off condition. Fig. 3 shows a similar arrangement in which transistor T11 is connected in the common collector mode. Fig. 6 shows the invention applied to a cross-bar switching network in which any input circuit such as K1, K2 can be connected via the appropriate switching unit B11, B12, B21, B22 to any output line such as Z1, Z2 dependent on the setting of switches such as SW11. Each input line such as K1 is connected via a filter F1, and emitter follower EF1 to the input terminal of switching units such as B11, B12, isolating resistors such as R119 are connected between successive input terminals to prevent boosting of high frequencies. Fig. 4 (not shown), relates to an amplifier suitable for connecting to each of the output lines Z1 of Fig. 6.
GB3686760A 1959-10-27 1960-10-27 Switching arrangements for television or like signals Expired GB916655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0029505 1959-10-27

Publications (1)

Publication Number Publication Date
GB916655A true GB916655A (en) 1963-01-23

Family

ID=7093344

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3686760A Expired GB916655A (en) 1959-10-27 1960-10-27 Switching arrangements for television or like signals

Country Status (2)

Country Link
GB (1) GB916655A (en)
NL (1) NL257065A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033149A2 (en) * 1980-01-23 1981-08-05 Nec Corporation Switch matrix apparatus for satellite-switched TDMA system or the like
GB2157907A (en) * 1984-04-18 1985-10-30 Alps Electric Co Ltd High-frequency switching circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033149A2 (en) * 1980-01-23 1981-08-05 Nec Corporation Switch matrix apparatus for satellite-switched TDMA system or the like
EP0033149A3 (en) * 1980-01-23 1981-10-07 Nec Corporation Switch matrix apparatus for satellite-switched tdma system or the like
GB2157907A (en) * 1984-04-18 1985-10-30 Alps Electric Co Ltd High-frequency switching circuit

Also Published As

Publication number Publication date
NL257065A (en)

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