FR2395640B1 - Generateur de signaux acoustiques de tonalite de touche synthetises numeriquement - Google Patents

Generateur de signaux acoustiques de tonalite de touche synthetises numeriquement

Info

Publication number
FR2395640B1
FR2395640B1 FR7818380A FR7818380A FR2395640B1 FR 2395640 B1 FR2395640 B1 FR 2395640B1 FR 7818380 A FR7818380 A FR 7818380A FR 7818380 A FR7818380 A FR 7818380A FR 2395640 B1 FR2395640 B1 FR 2395640B1
Authority
FR
France
Prior art keywords
signal generator
acoustic signal
key tone
digital synthesized
tone acoustic
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
FR7818380A
Other languages
English (en)
Other versions
FR2395640A1 (fr
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.)
Fairchild Semiconductor Corp
Original Assignee
Fairchild Camera and Instrument Corp
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 Fairchild Camera and Instrument Corp filed Critical Fairchild Camera and Instrument Corp
Publication of FR2395640A1 publication Critical patent/FR2395640A1/fr
Application granted granted Critical
Publication of FR2395640B1 publication Critical patent/FR2395640B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/022—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/02—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform
    • H03K4/026—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform using digital techniques
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H04M1/505—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies signals generated in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
FR7818380A 1977-06-22 1978-06-20 Generateur de signaux acoustiques de tonalite de touche synthetises numeriquement Expired FR2395640B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/808,937 US4132871A (en) 1977-06-22 1977-06-22 Digitally synthesized multi-frequency signal generator

Publications (2)

Publication Number Publication Date
FR2395640A1 FR2395640A1 (fr) 1979-01-19
FR2395640B1 true FR2395640B1 (fr) 1986-04-04

Family

ID=25200164

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7818380A Expired FR2395640B1 (fr) 1977-06-22 1978-06-20 Generateur de signaux acoustiques de tonalite de touche synthetises numeriquement

Country Status (6)

Country Link
US (1) US4132871A (fr)
JP (1) JPS548956A (fr)
CA (1) CA1106088A (fr)
DE (1) DE2824497A1 (fr)
FR (1) FR2395640B1 (fr)
GB (1) GB1594681A (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218589A (en) * 1979-03-28 1980-08-19 Wescom Switching, Inc. Method and apparatus for testing tone generators
US4259648A (en) * 1979-07-11 1981-03-31 Bell Telephone Laboratories, Incorporated One-bit frequency-shift-keyed modulator
GB2062315B (en) * 1979-10-30 1983-06-08 Philips Electronic Associated Frequency divider
US4352958A (en) * 1979-12-13 1982-10-05 Bell Telephone Laboratories, Incorporated Electronically-switched multifrequency generator with transducer control
US4394743A (en) * 1980-12-18 1983-07-19 Bell Telephone Laboratories, Incorporated Tone generation method and apparatus using stored reference calibration coefficients
CA1194245A (fr) * 1981-08-03 1985-09-24 Gerald P. Labedz Generateur de signaux de diverses tonalites
CA1163691A (fr) * 1982-02-26 1984-03-13 David E. Dodds Modem
GB2177862B (en) * 1985-07-09 1989-07-19 Motorola Inc Waveform generators
KR910001675B1 (ko) * 1988-05-27 1991-03-18 삼성전자 주식회사 이중음 다중주파수 및 고저음 발생회로
US5311580A (en) * 1988-07-18 1994-05-10 Canon Kabushiki Kaisha Communication apparatus for providing a modulated analog wave
US5208852A (en) * 1988-09-27 1993-05-04 Seiko Epson Corporation Sound generation circuit
US4980585A (en) * 1989-12-01 1990-12-25 Intel Corporation Method and apparatus for synthesizing digital waveforms
US5699420A (en) * 1994-12-23 1997-12-16 Lucent Technologies Inc. Bell sound synthesizer
GB2317063B (en) * 1996-09-03 1999-03-03 Holtek Microelectronics Inc An adjustable-period dual-tone multifrequency generator
US6400821B1 (en) * 1998-05-29 2002-06-04 Motorola, Inc. Digital tone generator
AU2001227339A1 (en) * 2000-10-13 2002-05-15 Sharegate Inc. Method and device for mitigating the effects of quarter-wave shorts caused by branched wiring

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2286564A1 (fr) * 1974-09-30 1976-04-23 Roche Bernard Dispositif synthetiseur de signaux a multifrequences
FR2286552A1 (fr) * 1974-09-30 1976-04-23 Roche Bernard Generateur numerique de signaux du code a multifrequences
US4058805A (en) * 1975-06-16 1977-11-15 Comdial Corporation Digital multitone generator for telephone dialing
US4007459A (en) * 1975-07-10 1977-02-08 Bell Telephone Laboratories, Incorporated Multitone pushbutton dial phase shift scanning circuitry

Also Published As

Publication number Publication date
DE2824497A1 (de) 1979-01-04
JPS548956A (en) 1979-01-23
FR2395640A1 (fr) 1979-01-19
US4132871A (en) 1979-01-02
CA1106088A (fr) 1981-07-28
GB1594681A (en) 1981-08-05

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Legal Events

Date Code Title Description
ST Notification of lapse