GB938169A - - Google Patents

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Publication number
GB938169A
GB938169A GB938169DA GB938169A GB 938169 A GB938169 A GB 938169A GB 938169D A GB938169D A GB 938169DA GB 938169 A GB938169 A GB 938169A
Authority
GB
United Kingdom
Prior art keywords
gate
delay
pulse
call word
selective
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.)
Active
Application number
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.)
Publication of GB938169A publication Critical patent/GB938169A/en
Active legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/028—Selective call decoders using pulse address codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

938,169. Electric selective signalling systems. ALBISWERK ZURICH A.G. May 19, 1961 [May 23, 1960], No. 18370/61. Class 40 (1). In a selective calling system in which the call word comprises two signals of selective lengths preceded by a start signal A1 and followed by an end signal S1, the call word is applied by a receiver demodulator 8, Fig. 1, to a delay 3, a gate 4 and a gate 6, the gates 4 and 6 being interconnected by a delay 5, and the delays are so proportioned that when a call word which they are arranged to recognize arrives the first pulse begins to emerge from delay 3 as the second pulse is applied to gate 4, and the second pulse, having passed gate 4, begins to emerge from delay 6 as the end pulse S1 is applied to gate 6, and hence an alarm device 7 is actuated. The detailed circuit (Fig. 2, not shown) has the feature that it will correctly recognize a call word even if the second signal is slightly late,
GB938169D 1960-05-23 Active GB938169A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1179482X 1960-05-23
CH587260A CH377414A (en) 1960-05-23 1960-05-23 Selective call system

Publications (1)

Publication Number Publication Date
GB938169A true GB938169A (en)

Family

ID=25698547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB938169D Active GB938169A (en) 1960-05-23

Country Status (2)

Country Link
CH (1) CH377414A (en)
GB (1) GB938169A (en)

Also Published As

Publication number Publication date
CH377414A (en) 1964-05-15

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