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BR7704723A - Aperfeicoamento em receptor para sinais de frequencia de voz - Google Patents

Aperfeicoamento em receptor para sinais de frequencia de voz

Info

Publication number
BR7704723A
BR7704723A BR7704723A BR7704723A BR7704723A BR 7704723 A BR7704723 A BR 7704723A BR 7704723 A BR7704723 A BR 7704723A BR 7704723 A BR7704723 A BR 7704723A BR 7704723 A BR7704723 A BR 7704723A
Authority
BR
Brazil
Prior art keywords
receiver
improvement
voice frequency
frequency signs
signs
Prior art date
Application number
BR7704723A
Other languages
English (en)
Inventor
P Bakker
J Maat
Original Assignee
Philips Nv
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 Nv filed Critical Philips Nv
Publication of BR7704723A publication Critical patent/BR7704723A/pt

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
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BR7704723A 1976-07-20 1977-07-18 Aperfeicoamento em receptor para sinais de frequencia de voz BR7704723A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7608047A NL7608047A (nl) 1976-07-20 1976-07-20 Ontvanginrichting voor toonfrequente tekens.

Publications (1)

Publication Number Publication Date
BR7704723A true BR7704723A (pt) 1978-05-16

Family

ID=19826629

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7704723A BR7704723A (pt) 1976-07-20 1977-07-18 Aperfeicoamento em receptor para sinais de frequencia de voz

Country Status (7)

Country Link
JP (1) JPS5313810A (pt)
BE (1) BE856903A (pt)
BR (1) BR7704723A (pt)
DE (1) DE2730453A1 (pt)
FR (1) FR2359561A1 (pt)
NL (1) NL7608047A (pt)
SE (1) SE7708218L (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4696031A (en) * 1985-12-31 1987-09-22 Wang Laboratories, Inc. Signal detection and discrimination using waveform peak factor

Also Published As

Publication number Publication date
BE856903A (fr) 1978-01-18
DE2730453A1 (de) 1978-01-26
FR2359561A1 (fr) 1978-02-17
JPS5313810A (en) 1978-02-07
NL7608047A (nl) 1978-01-24
SE7708218L (sv) 1978-01-21

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