GB472586A - Improvements in or relating to radio communication systems - Google Patents

Improvements in or relating to radio communication systems

Info

Publication number
GB472586A
GB472586A GB8203/37A GB820337A GB472586A GB 472586 A GB472586 A GB 472586A GB 8203/37 A GB8203/37 A GB 8203/37A GB 820337 A GB820337 A GB 820337A GB 472586 A GB472586 A GB 472586A
Authority
GB
United Kingdom
Prior art keywords
amplifier
circuit
transmitter
static
detector
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
GB8203/37A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB472586A publication Critical patent/GB472586A/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
    • 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)
  • Transmitters (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

472,586. Wireless signalling. STANDARD TELEPHONES & CABLES, Ltd. March 19, 1937, No. 8203. Convention date, July 31, 1936. [Class 40 (v)] A switching circuit responsive to received carrier waves to render operative the receiver output circuit comprises separate means for suppressing the effect of slow and fast variations in static whilst maintaining the circuit at maximum sensitivity to carrier waves for the amount of static present. The switching circuit 10 comprises an amplifier 11 with an associated A.V.C. system F1, 13, the filter F1 of which excludes the carrier and side-band frequencies to render the system responsive to the average noise amplitude only. The amplifier 11 feeds two filters F2, F3 followed by detectors 15. The filters F2, F3 both pass static peaks to produce detector outputs which are opposed and balance out, while only the filter F2 passes the carrier frequency to produce a control potential which is used to render operative the output of the receiver 5 ... 9 at the point 16 and disable the device 4<1> of the associated transmitter 1<1>, 2<1>. The device 4<1> is provided to connect the transmitting aerial TAE to the transmitter at the point 3<1> and to disable the switching means 10 on its output side when line signals from the hybrid connection H2 are applied to the transmitter. Circuit details of the detector system 15, the amplifier 11 and the detector 13 are described, Figs. 2, 3 and 4 (not shown).
GB8203/37A 1936-07-31 1937-03-19 Improvements in or relating to radio communication systems Expired GB472586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US93584A US2098286A (en) 1936-07-31 1936-07-31 Transmission control in signaling systems

Publications (1)

Publication Number Publication Date
GB472586A true GB472586A (en) 1937-09-27

Family

ID=22239730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8203/37A Expired GB472586A (en) 1936-07-31 1937-03-19 Improvements in or relating to radio communication systems

Country Status (2)

Country Link
US (1) US2098286A (en)
GB (1) GB472586A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426581A (en) * 1942-07-01 1947-09-02 Tungsol Lamp Works Inc Method of and apparatus for concurent radio transmission and reception
US2502154A (en) * 1945-02-15 1950-03-28 Charles L Jeffers Carrier shift receiving system
US2937270A (en) * 1945-04-28 1960-05-17 Rca Corp Pulse receiver
NL68639C (en) * 1946-05-13
FR962513A (en) * 1947-03-01 1950-06-14
US2488153A (en) * 1947-03-04 1949-11-15 Jay D Wiener Portable telephone extension
US2607004A (en) * 1947-09-12 1952-08-12 Donald B Harris Radio transmission system
US2531505A (en) * 1947-10-08 1950-11-28 Union Switch & Signal Co Noise suppression means for communication receiving apparatus
US2605395A (en) * 1948-11-12 1952-07-29 Gen Electric Noise suppression circuits
US2636982A (en) * 1949-05-20 1953-04-28 fluexuu vtftvo
US2694142A (en) * 1949-11-10 1954-11-09 Bell Telephone Labor Inc Signal-to-noise energy detection unit
US2770721A (en) * 1952-05-03 1956-11-13 Motorola Inc Squelch circuit
US2852622A (en) * 1955-01-13 1958-09-16 Collins Radio Co Signal-to-noise squelch control circuit

Also Published As

Publication number Publication date
US2098286A (en) 1937-11-09

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