FR2307423A1 - Repetition tone signal evaluation - prevents disturbance by limiting resonance frequency of frequency selective circuit through switching transistor - Google Patents

Repetition tone signal evaluation - prevents disturbance by limiting resonance frequency of frequency selective circuit through switching transistor

Info

Publication number
FR2307423A1
FR2307423A1 FR7610288A FR7610288A FR2307423A1 FR 2307423 A1 FR2307423 A1 FR 2307423A1 FR 7610288 A FR7610288 A FR 7610288A FR 7610288 A FR7610288 A FR 7610288A FR 2307423 A1 FR2307423 A1 FR 2307423A1
Authority
FR
France
Prior art keywords
frequency
resonance frequency
switching transistor
repetition
tone signal
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.)
Granted
Application number
FR7610288A
Other languages
French (fr)
Other versions
FR2307423B1 (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.)
FUNKTECHNISCHES LABOR VON SONN
Original Assignee
FUNKTECHNISCHES LABOR VON SONN
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 DE19752515265 external-priority patent/DE2515265B1/en
Priority claimed from DE19762612331 external-priority patent/DE2612331C2/en
Application filed by FUNKTECHNISCHES LABOR VON SONN filed Critical FUNKTECHNISCHES LABOR VON SONN
Publication of FR2307423A1 publication Critical patent/FR2307423A1/en
Application granted granted Critical
Publication of FR2307423B1 publication Critical patent/FR2307423B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/027—Selective call decoders using frequency address codes
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac
    • G08C19/14—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac using combination of fixed frequencies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)

Abstract

The step-by-step switching of a frequency-selective device, with a variable resonance frequency is, by the individual tone signals; a RESET signal is produced when the control signal is generated by an individual tone signal, is missing. Disturbing effects, which can be caused by very short individual tones of high voltage amplitude, can be avoided if, depending on each individual tone, another undelayed control signal is produced. This is used to limit the resonance voltage which may be generated in the frequency selective circuit (10). A voltage, derived from each single tone, controls the threshold unit (11) and is applied through a resistor (25) to the gate of a switching transistor (26). This sets the transistor to an internal resistance which limits the resonance frequency of the unit (10).
FR7610288A 1975-04-08 1976-04-08 Repetition tone signal evaluation - prevents disturbance by limiting resonance frequency of frequency selective circuit through switching transistor Granted FR2307423A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19752515265 DE2515265B1 (en) 1975-04-08 1975-04-08 Method and circuit arrangement for evaluating subsequent tone signals
DE19762612331 DE2612331C2 (en) 1976-03-23 1976-03-23 Method and circuit arrangement for evaluating subsequent tone signals

Publications (2)

Publication Number Publication Date
FR2307423A1 true FR2307423A1 (en) 1976-11-05
FR2307423B1 FR2307423B1 (en) 1979-04-20

Family

ID=25768731

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7610288A Granted FR2307423A1 (en) 1975-04-08 1976-04-08 Repetition tone signal evaluation - prevents disturbance by limiting resonance frequency of frequency selective circuit through switching transistor

Country Status (3)

Country Link
AT (1) AT343213B (en)
CH (1) CH593527A5 (en)
FR (1) FR2307423A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766523A (en) * 1972-10-04 1973-10-16 Motorola Inc Sequential tone signalling system
FR2205779A1 (en) * 1972-11-07 1974-05-31 Motorola Inc
FR2220953A1 (en) * 1973-03-07 1974-10-04 Bosch Elektronik Gmbh

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766523A (en) * 1972-10-04 1973-10-16 Motorola Inc Sequential tone signalling system
FR2205779A1 (en) * 1972-11-07 1974-05-31 Motorola Inc
FR2220953A1 (en) * 1973-03-07 1974-10-04 Bosch Elektronik Gmbh

Also Published As

Publication number Publication date
AT343213B (en) 1978-05-10
ATA245276A (en) 1977-09-15
FR2307423B1 (en) 1979-04-20
CH593527A5 (en) 1977-12-15

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Legal Events

Date Code Title Description
ST Notification of lapse