ES8104699A1 - Circuitry for driving a signalling loudspeaker. - Google Patents

Circuitry for driving a signalling loudspeaker.

Info

Publication number
ES8104699A1
ES8104699A1 ES493896A ES493896A ES8104699A1 ES 8104699 A1 ES8104699 A1 ES 8104699A1 ES 493896 A ES493896 A ES 493896A ES 493896 A ES493896 A ES 493896A ES 8104699 A1 ES8104699 A1 ES 8104699A1
Authority
ES
Spain
Prior art keywords
loudspeaker
signal
driving
signalling
circuitry
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.)
Expired
Application number
ES493896A
Other languages
Spanish (es)
Other versions
ES493896A0 (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.)
Siemens AG
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 ES493896A0 publication Critical patent/ES493896A0/en
Publication of ES8104699A1 publication Critical patent/ES8104699A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

Circuit arrangement for driving a signal loudspeaker (L), in which an oscillator (OS) is provided which can be gated by a control signal (ST) and which generates rectangular signals (S1) allocated to a signal tone. The oscillator (OS) is followed by a pulse shaper (JF) which generates with at least one edge of each rectangular signal (S1) a pulse (S2) which is short in comparison with the duration of the period of the rectangular signals (S1) and which is supplied to the signal loudspeaker (L) via an amplifier stage (T).
ES493896A 1979-08-02 1980-07-31 Circuitry for driving a signalling loudspeaker. Expired ES8104699A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2931437A DE2931437C2 (en) 1979-08-02 1979-08-02 Circuit arrangement for controlling a signal loudspeaker

Publications (2)

Publication Number Publication Date
ES493896A0 ES493896A0 (en) 1981-04-01
ES8104699A1 true ES8104699A1 (en) 1981-04-01

Family

ID=6077496

Family Applications (1)

Application Number Title Priority Date Filing Date
ES493896A Expired ES8104699A1 (en) 1979-08-02 1980-07-31 Circuitry for driving a signalling loudspeaker.

Country Status (8)

Country Link
EP (1) EP0023697A1 (en)
DE (1) DE2931437C2 (en)
DK (1) DK332580A (en)
ES (1) ES8104699A1 (en)
FI (1) FI802425A (en)
NO (1) NO802295L (en)
PT (1) PT71642B (en)
YU (1) YU191380A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4797932A (en) * 1987-11-23 1989-01-10 Ncr Corporation Speaker volume control apparatus and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466649A (en) * 1966-03-01 1969-09-09 Gen Alarm Corp Multiple alarm system
US3657568A (en) * 1970-01-05 1972-04-18 Hamilton Watch Co Pulse shaping circuit using complementary mos devices
US3686666A (en) * 1970-05-11 1972-08-22 Xerox Corp Interrupted pulsing circuit for audible signaling
US3675133A (en) * 1971-06-21 1972-07-04 Ibm Apparatus and method independently varying the widths of a plurality of pulses
DE2554219A1 (en) * 1975-12-03 1977-06-16 Standard Elektrik Lorenz Ag CIRCUIT ARRANGEMENT FOR AN ACOUSTIC SIGNAL GENERATOR

Also Published As

Publication number Publication date
PT71642B (en) 1981-06-26
DE2931437C2 (en) 1981-09-24
ES493896A0 (en) 1981-04-01
FI802425A (en) 1981-02-03
DE2931437B1 (en) 1980-12-11
NO802295L (en) 1981-02-03
YU191380A (en) 1983-09-30
DK332580A (en) 1981-02-03
EP0023697A1 (en) 1981-02-11
PT71642A (en) 1980-09-01

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