GB1190286A - Multi-Frequency Signal Receiver - Google Patents

Multi-Frequency Signal Receiver

Info

Publication number
GB1190286A
GB1190286A GB4340668A GB4340668A GB1190286A GB 1190286 A GB1190286 A GB 1190286A GB 4340668 A GB4340668 A GB 4340668A GB 4340668 A GB4340668 A GB 4340668A GB 1190286 A GB1190286 A GB 1190286A
Authority
GB
United Kingdom
Prior art keywords
signal
transistor
volts
potential
threshold
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
GB4340668A
Other languages
English (en)
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1190286A publication Critical patent/GB1190286A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuits Of Receivers In General (AREA)
GB4340668A 1967-09-15 1968-09-12 Multi-Frequency Signal Receiver Expired GB1190286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6712685A NL6712685A (enExample) 1967-09-15 1967-09-15

Publications (1)

Publication Number Publication Date
GB1190286A true GB1190286A (en) 1970-04-29

Family

ID=19801225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4340668A Expired GB1190286A (en) 1967-09-15 1968-09-12 Multi-Frequency Signal Receiver

Country Status (6)

Country Link
AT (1) AT289213B (enExample)
BE (1) BE720880A (enExample)
DK (1) DK141430B (enExample)
FR (1) FR1579910A (enExample)
GB (1) GB1190286A (enExample)
NL (1) NL6712685A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2116635C3 (de) * 1971-04-05 1978-10-05 Ibm Deutschland Gmbh, 7000 Stuttgart Verfahren zur digitalen Decodierung frequenzcodierter Signale und Schaltungsanordnung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
BE720880A (enExample) 1969-03-13
DK141430B (da) 1980-03-10
DK141430C (enExample) 1980-09-15
NL6712685A (enExample) 1969-03-18
FR1579910A (enExample) 1969-08-29
AT289213B (de) 1971-04-13

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee