GB771594A - Receiving channel amplifier and signal receiver - Google Patents

Receiving channel amplifier and signal receiver

Info

Publication number
GB771594A
GB771594A GB19228/53A GB1922853A GB771594A GB 771594 A GB771594 A GB 771594A GB 19228/53 A GB19228/53 A GB 19228/53A GB 1922853 A GB1922853 A GB 1922853A GB 771594 A GB771594 A GB 771594A
Authority
GB
United Kingdom
Prior art keywords
transformer
signalling
relay
tuned
network
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
GB19228/53A
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 GB771594A publication Critical patent/GB771594A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

771,594. Voice frequency receivers. STANDARD TELEPHONES & CABLES, Ltd. July 10, 1953 [Nov. 3, 1952], No. 19228/53. Class 40 (4). In a communication system using out-ofband voice-frequency signalling, a receive amplifier dealing with the communication and signalling currents includes a reflex circuit arrangement whereby a predetermined harmonic of the signalling current is further amplified for actuation of the signalling relay. Incoming signals are applied to amplifier 1 over a transformer 3 and communication currents pass to terminals 7 over an anode transformer 4. The signalling current is selected by a tuned transformer 6 and harmonics thereof developed in a network 8 are applied to the grid of valve 1 via a potentiometer arrangement comprising a resistor R5 and the tuned primary of transformer 9. The amplified harmonic is selected by a tuned transformer 5 and applied via rectifiers Gl3, Gl4 to operating winding 12 of relay S. Changes of signal level and variations in the supply voltage are compensated for by a loading network 10 connected across the secondary of transformer 9 which network includes rectifiers Gl5, Gl6 biased by the difference between the operating voltage, and the hold voltage applied to the hold coil 13 of relay S.
GB19228/53A 1952-11-03 1953-07-10 Receiving channel amplifier and signal receiver Expired GB771594A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE319075X 1952-11-03

Publications (1)

Publication Number Publication Date
GB771594A true GB771594A (en) 1957-04-03

Family

ID=6151492

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19228/53A Expired GB771594A (en) 1952-11-03 1953-07-10 Receiving channel amplifier and signal receiver

Country Status (2)

Country Link
CH (1) CH319075A (en)
GB (1) GB771594A (en)

Also Published As

Publication number Publication date
CH319075A (en) 1957-01-31

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