IT1093892B - Ricevitore di segnali selettivo in frequenza,protetto da un funzionamento accidentale causato dalla vcce - Google Patents

Ricevitore di segnali selettivo in frequenza,protetto da un funzionamento accidentale causato dalla vcce

Info

Publication number
IT1093892B
IT1093892B IT21481/78A IT2148178A IT1093892B IT 1093892 B IT1093892 B IT 1093892B IT 21481/78 A IT21481/78 A IT 21481/78A IT 2148178 A IT2148178 A IT 2148178A IT 1093892 B IT1093892 B IT 1093892B
Authority
IT
Italy
Prior art keywords
vcce
protected
signal receiver
frequency selective
operation caused
Prior art date
Application number
IT21481/78A
Other languages
English (en)
Italian (it)
Other versions
IT7821481A0 (it
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of IT7821481A0 publication Critical patent/IT7821481A0/it
Application granted granted Critical
Publication of IT1093892B publication Critical patent/IT1093892B/it

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
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Dc Digital Transmission (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT21481/78A 1977-03-23 1978-03-22 Ricevitore di segnali selettivo in frequenza,protetto da un funzionamento accidentale causato dalla vcce IT1093892B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2712831A DE2712831B2 (de) 1977-03-23 1977-03-23 Sprachgeschützter frequenzselektiver Zeichenempfänger

Publications (2)

Publication Number Publication Date
IT7821481A0 IT7821481A0 (it) 1978-03-22
IT1093892B true IT1093892B (it) 1985-07-26

Family

ID=6004476

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21481/78A IT1093892B (it) 1977-03-23 1978-03-22 Ricevitore di segnali selettivo in frequenza,protetto da un funzionamento accidentale causato dalla vcce

Country Status (6)

Country Link
JP (1) JPS53117903A (de)
DE (1) DE2712831B2 (de)
FR (1) FR2385283A1 (de)
IT (1) IT1093892B (de)
NL (1) NL7803090A (de)
SE (1) SE7803253L (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL64230A0 (en) * 1981-11-06 1982-02-28 Israel Electronics Corp Tone detector
DD259987A3 (de) * 1986-07-07 1988-09-14 Rft Nachrichtenelektronik Albe Verfahren und anordnung zum sprachschutz in mfc-tastwahlempfaengern
DD266253A3 (de) * 1987-06-22 1989-03-29 Leipzig Rft Nachrichtenelekt Universeller digitaler mfc-empfaenger

Also Published As

Publication number Publication date
NL7803090A (nl) 1978-09-26
SE7803253L (sv) 1978-09-24
DE2712831C3 (de) 1980-09-25
DE2712831B2 (de) 1980-01-24
DE2712831A1 (de) 1978-10-05
JPS53117903A (en) 1978-10-14
IT7821481A0 (it) 1978-03-22
FR2385283A1 (fr) 1978-10-20

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