NL166830C - DEVICE FOR DETECTING AC CURRENT SIGNALS WITH VARIOUS, PRE-DEFINED FREQUENCIES. - Google Patents

DEVICE FOR DETECTING AC CURRENT SIGNALS WITH VARIOUS, PRE-DEFINED FREQUENCIES.

Info

Publication number
NL166830C
NL166830C NL7317691.A NL7317691A NL166830C NL 166830 C NL166830 C NL 166830C NL 7317691 A NL7317691 A NL 7317691A NL 166830 C NL166830 C NL 166830C
Authority
NL
Netherlands
Prior art keywords
detecting
various
current signals
defined frequencies
frequencies
Prior art date
Application number
NL7317691.A
Other languages
Dutch (nl)
Other versions
NL166830B (en
NL7317691A (en
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
Priority claimed from DE19722264031 external-priority patent/DE2264031C3/en
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of NL7317691A publication Critical patent/NL7317691A/xx
Publication of NL166830B publication Critical patent/NL166830B/en
Application granted granted Critical
Publication of NL166830C publication Critical patent/NL166830C/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Geophysics And Detection Of Objects (AREA)
NL7317691.A 1972-12-29 1973-12-27 DEVICE FOR DETECTING AC CURRENT SIGNALS WITH VARIOUS, PRE-DEFINED FREQUENCIES. NL166830C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722264031 DE2264031C3 (en) 1972-12-29 Method for the frequency and level evaluation of a pilot voltage

Publications (3)

Publication Number Publication Date
NL7317691A NL7317691A (en) 1974-07-02
NL166830B NL166830B (en) 1981-04-15
NL166830C true NL166830C (en) 1981-09-15

Family

ID=5865758

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7317691.A NL166830C (en) 1972-12-29 1973-12-27 DEVICE FOR DETECTING AC CURRENT SIGNALS WITH VARIOUS, PRE-DEFINED FREQUENCIES.

Country Status (8)

Country Link
JP (1) JPS4999208A (en)
BE (1) BE809260A (en)
FR (1) FR2212550B1 (en)
GB (1) GB1451816A (en)
IL (1) IL43889A (en)
IT (1) IT1000761B (en)
NL (1) NL166830C (en)
SE (1) SE397412B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610540A (en) * 1982-07-06 1986-09-09 General Electric Company Frequency burst analyzer
HUP0402132A2 (en) * 2004-10-20 2006-07-28 Laszlo Csanyi Multi function circuit containing qcan resonat members for suitable supplying adresses and data to the adress and data inputs of the digital and analogous devices from a signal source characterised by frequency

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL263599A (en) * 1960-04-13
US3462547A (en) * 1966-09-06 1969-08-19 Stanford Research Inst Data processing system for signals obtained from a video scanner
DE1512628A1 (en) * 1967-04-24 1969-04-24 Verbundnetz Mitte Veb Also coupled transistor amplifier for limit value switching
US3555290A (en) * 1969-05-29 1971-01-12 Walter Ellermeyer Second-highest redundant voltage selector
US3619791A (en) * 1969-09-23 1971-11-09 Bendix Corp Intermediate amplitude signal selector

Also Published As

Publication number Publication date
DE2264031B2 (en) 1976-08-19
NL166830B (en) 1981-04-15
IT1000761B (en) 1976-04-10
SE397412B (en) 1977-10-31
FR2212550A1 (en) 1974-07-26
IL43889A0 (en) 1974-03-14
FR2212550B1 (en) 1979-04-20
GB1451816A (en) 1976-10-06
BE809260A (en) 1974-06-28
JPS4999208A (en) 1974-09-19
IL43889A (en) 1977-03-31
DE2264031A1 (en) 1974-07-18
NL7317691A (en) 1974-07-02

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee