IT7821472A0 - Ricevitore di segnali selettivo in frequenza, protetto da un funzionamento accidentale causato dalla voce. - Google Patents

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

Info

Publication number
IT7821472A0
IT7821472A0 IT7821472A IT2147278A IT7821472A0 IT 7821472 A0 IT7821472 A0 IT 7821472A0 IT 7821472 A IT7821472 A IT 7821472A IT 2147278 A IT2147278 A IT 2147278A IT 7821472 A0 IT7821472 A0 IT 7821472A0
Authority
IT
Italy
Prior art keywords
voice
protected
signal receiver
frequency selective
operation caused
Prior art date
Application number
IT7821472A
Other languages
English (en)
Other versions
IT1093692B (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 IT7821472A0 publication Critical patent/IT7821472A0/it
Application granted granted Critical
Publication of IT1093692B publication Critical patent/IT1093692B/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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Circuits Of Receivers In General (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Dc Digital Transmission (AREA)
IT21472/78A 1977-03-23 1978-03-22 Ricevitore di segnali selettivo in frequenza,protetto da un funzionamento accidentale causato dalla voce IT1093692B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2712847A DE2712847C3 (de) 1977-03-23 1977-03-23 Sprachgeschützter frequenzselektiver Zeichenempfänger

Publications (2)

Publication Number Publication Date
IT7821472A0 true IT7821472A0 (it) 1978-03-22
IT1093692B IT1093692B (it) 1985-07-26

Family

ID=6004480

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21472/78A IT1093692B (it) 1977-03-23 1978-03-22 Ricevitore di segnali selettivo in frequenza,protetto da un funzionamento accidentale causato dalla voce

Country Status (9)

Country Link
US (1) US4187403A (it)
JP (1) JPS53117902A (it)
AT (1) AT370579B (it)
DE (1) DE2712847C3 (it)
FR (1) FR2385284A1 (it)
GB (1) GB1599111A (it)
IT (1) IT1093692B (it)
NL (1) NL7802771A (it)
SE (1) SE7803252L (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2921899C2 (de) * 1979-05-30 1987-01-22 Nord-Micro Elektronik Feinmechanik AG, 6000 Frankfurt Verfahren zur Frequenzmessung
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537001A (en) * 1968-12-05 1970-10-27 Bell Telephone Labor Inc Multifrequency tone detector
BR7101977D0 (pt) * 1971-04-05 1973-06-14 Ibm Processos e disposicoes de circuito para decodificacao digital de sinais de frequencia codificada
DE2422840A1 (de) * 1974-05-10 1975-12-11 Standard Elektrik Lorenz Ag Frequenzselektiver signalempfaenger

Also Published As

Publication number Publication date
DE2712847C3 (de) 1979-12-06
US4187403A (en) 1980-02-05
ATA195178A (de) 1982-08-15
NL7802771A (nl) 1978-09-26
JPS53117902A (en) 1978-10-14
AT370579B (de) 1983-04-11
SE7803252L (sv) 1978-09-24
DE2712847B2 (de) 1979-04-12
FR2385284A1 (fr) 1978-10-20
IT1093692B (it) 1985-07-26
GB1599111A (en) 1981-09-30
FR2385284B1 (it) 1982-03-26
DE2712847A1 (de) 1978-10-05

Similar Documents

Publication Publication Date Title
NL188881C (nl) Luidsprekermembraan.
NL7607300A (nl) Automatisch radio-telefoniesysteem.
NO145257C (no) Sender/mottager.
NL7805956A (nl) Luidspreker.
NL7807905A (nl) Telefoontoestel.
NL188197C (nl) Signaalontvanger.
NL189843B (nl) Luidspreker.
IT1084404B (it) Ripetitore di frequenza vocali bidirezionali.
NL7807863A (nl) Multi-frequentie signaalontvanger.
NL179435C (nl) Ontvanger met een frequentiesynthese-schakeling.
ES237743Y (es) Disposicion de senalizacion.
IT1103475B (it) Interfenilen 8-aza-9-diossotia-11,12-secoprostaglandine
NL7714545A (nl) Radiotelefoniestelsel.
NL187883C (nl) Am-ontvanger.
IT7824874A0 (it) 2-arilammino-3,5-dinitro-benzotrifluoruri.
IT7821472A0 (it) Ricevitore di segnali selettivo in frequenza, protetto da un funzionamento accidentale causato dalla voce.
IT7821481A0 (it) Ricevitore di segnali selettivo in frequenza, protetto da un funzionamento accidentale causato dalla voce.
NL7802396A (nl) Ontvanger.
NL187330C (nl) Multifrekwentie-code-signaalontvanger.
NL7809721A (nl) Ontvanger voor telefoon- kostentelimpulsen.
NL7709578A (nl) Telefoonlijnschakeling.
NL7810496A (nl) Signaalmast.
NL7709590A (nl) Telefoonstelsel.
NL7802887A (nl) Signaalblokkeerschakeling voor een am-ontvanger.
NL7809423A (nl) Ontvangercircuit.