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GB1480418A - Circuit arrangement and simplex radio transceiver for increasing the operational safety of radio traffic - Google Patents

Circuit arrangement and simplex radio transceiver for increasing the operational safety of radio traffic

Info

Publication number
GB1480418A
GB1480418A GB45187/74A GB4518774A GB1480418A GB 1480418 A GB1480418 A GB 1480418A GB 45187/74 A GB45187/74 A GB 45187/74A GB 4518774 A GB4518774 A GB 4518774A GB 1480418 A GB1480418 A GB 1480418A
Authority
GB
United Kingdom
Prior art keywords
comparator
radio
increasing
squelch
circuit arrangement
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
GB45187/74A
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.)
BUDAPESTI RADIO TECH GYAR
Original Assignee
BUDAPESTI RADIO TECH GYAR
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 BUDAPESTI RADIO TECH GYAR filed Critical BUDAPESTI RADIO TECH GYAR
Publication of GB1480418A publication Critical patent/GB1480418A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)

Abstract

1480418 Radio signalling BUDAPESTI RADIOTECHNIKAI GYAR 18 Oct 1974 [22 Oct 1973] 45187/74 Heading H4L A transceiver which is provided with sendreceive switching and a common aerial and in which the receiver includes an inhibit (squelch) circuit, is provided with a comparator responsive to the squelch circuit and coupled to a controlled switch to prevent the operation of the transmitter in the presence of received signals, above a predetermined threshold value set on a potentiometer, and provided as one input to the comparator (differential amplifier) receiving as its other input, an output signal from the squelch circuit, the comparator being coupled to the controlled switch itself controlling transmission. By this means a third station is prevented from entering an existing radio connection between two stations in systems wherein mobile stations communicate via a base station on a common carrier frequency.
GB45187/74A 1973-10-22 1974-10-18 Circuit arrangement and simplex radio transceiver for increasing the operational safety of radio traffic Expired GB1480418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUVA1415A HU166955B (en) 1973-10-22 1973-10-22

Publications (1)

Publication Number Publication Date
GB1480418A true GB1480418A (en) 1977-07-20

Family

ID=11002303

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45187/74A Expired GB1480418A (en) 1973-10-22 1974-10-18 Circuit arrangement and simplex radio transceiver for increasing the operational safety of radio traffic

Country Status (9)

Country Link
CS (1) CS187430B2 (en)
DD (1) DD112871A5 (en)
DE (1) DE2448934A1 (en)
FR (1) FR2248654B1 (en)
GB (1) GB1480418A (en)
HU (1) HU166955B (en)
NL (1) NL7413830A (en)
SE (1) SE392555B (en)
SU (1) SU679172A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088837A1 (en) * 1982-03-12 1983-09-21 Nigel Matthew Corrigan Radio transmitting and receiving apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5657372A (en) * 1994-10-17 1997-08-12 Ericsson Inc. Systems and methods for selectively accepting telephone calls without establishing voice communications
DE102004035739A1 (en) * 2004-07-23 2006-03-16 Siemens Ag Device and method for signal transmission with damping unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088837A1 (en) * 1982-03-12 1983-09-21 Nigel Matthew Corrigan Radio transmitting and receiving apparatus

Also Published As

Publication number Publication date
FR2248654A1 (en) 1975-05-16
HU166955B (en) 1975-06-28
NL7413830A (en) 1975-04-24
DE2448934A1 (en) 1975-04-30
FR2248654B1 (en) 1979-10-19
CS187430B2 (en) 1979-01-31
SU679172A3 (en) 1979-08-05
SE7412908L (en) 1975-04-23
SE392555B (en) 1977-03-28
DD112871A5 (en) 1975-05-05

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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