GB801062A - Improvements in or relating to signal selection circuits - Google Patents

Improvements in or relating to signal selection circuits

Info

Publication number
GB801062A
GB801062A GB2983855A GB2983855A GB801062A GB 801062 A GB801062 A GB 801062A GB 2983855 A GB2983855 A GB 2983855A GB 2983855 A GB2983855 A GB 2983855A GB 801062 A GB801062 A GB 801062A
Authority
GB
United Kingdom
Prior art keywords
lines
relating
oct
switch
source
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
GB2983855A
Inventor
Gilbert Nicholls
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.)
Rank Cintel Ltd
Original Assignee
Rank Cintel Ltd
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 Rank Cintel Ltd filed Critical Rank Cintel Ltd
Priority to GB2983855A priority Critical patent/GB801062A/en
Publication of GB801062A publication Critical patent/GB801062A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/48—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source

Abstract

801,062. Transmission circuits. RANK CINTEL, Ltd. Oct. 19, 1956 [Oct. 19, 1955], No. 29838/55. Class 40 (4). A switch which connects either of two coaxial transmission lines 3 or 4 to a matching resistance 5 so that signals from a source 1 or a source 2 are applied to a load 6, comprises make-beforebreak contacts 8, 8A and 9, 9A of a relay 7 which connect the line circuit out of use to a further matching impedance 10. The resistors both have a value equal to the modulus of the characteristic impedance of the two lines, and during changeover operation of the switch are connected in parallel to both the lines by the make-before-break contacts 8A, 9A so that abrupt change in signal level is prevented.
GB2983855A 1955-10-19 1955-10-19 Improvements in or relating to signal selection circuits Expired GB801062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2983855A GB801062A (en) 1955-10-19 1955-10-19 Improvements in or relating to signal selection circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2983855A GB801062A (en) 1955-10-19 1955-10-19 Improvements in or relating to signal selection circuits

Publications (1)

Publication Number Publication Date
GB801062A true GB801062A (en) 1958-09-10

Family

ID=10298020

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2983855A Expired GB801062A (en) 1955-10-19 1955-10-19 Improvements in or relating to signal selection circuits

Country Status (1)

Country Link
GB (1) GB801062A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182202A (en) * 1959-12-18 1965-05-04 Post Office Electric pulse-operated switching circuit
US4543495A (en) * 1981-05-21 1985-09-24 Marconi Instruments Limited Diode bridge switching circuit with high attenuation
US4935709A (en) * 1985-06-12 1990-06-19 Samuel Singer Switchable coupling apparatus for television receiver only installation
US4982442A (en) * 1989-04-25 1991-01-01 Motorola, Inc. Low cost antenna switch using relays configured in a transmit/receive arrangement
US5274343A (en) * 1991-08-06 1993-12-28 Raytheon Company Plural switch circuits having RF propagation networks and RF terminations
US5783975A (en) * 1996-01-18 1998-07-21 Nec Corporation Circuit selection device
US6756859B2 (en) 2000-11-22 2004-06-29 Telefonaktiebolaget Lm Ericsson (Publ) R.F. antenna switch for use with internal and external antennas

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182202A (en) * 1959-12-18 1965-05-04 Post Office Electric pulse-operated switching circuit
US4543495A (en) * 1981-05-21 1985-09-24 Marconi Instruments Limited Diode bridge switching circuit with high attenuation
US4935709A (en) * 1985-06-12 1990-06-19 Samuel Singer Switchable coupling apparatus for television receiver only installation
US4982442A (en) * 1989-04-25 1991-01-01 Motorola, Inc. Low cost antenna switch using relays configured in a transmit/receive arrangement
US5274343A (en) * 1991-08-06 1993-12-28 Raytheon Company Plural switch circuits having RF propagation networks and RF terminations
US5783975A (en) * 1996-01-18 1998-07-21 Nec Corporation Circuit selection device
US6756859B2 (en) 2000-11-22 2004-06-29 Telefonaktiebolaget Lm Ericsson (Publ) R.F. antenna switch for use with internal and external antennas

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