FR2291648A1 - Modulateur de frequence comprenant un condensateur, une source de courant commandee et un circuit bistable - Google Patents

Modulateur de frequence comprenant un condensateur, une source de courant commandee et un circuit bistable

Info

Publication number
FR2291648A1
FR2291648A1 FR7534402A FR7534402A FR2291648A1 FR 2291648 A1 FR2291648 A1 FR 2291648A1 FR 7534402 A FR7534402 A FR 7534402A FR 7534402 A FR7534402 A FR 7534402A FR 2291648 A1 FR2291648 A1 FR 2291648A1
Authority
FR
France
Prior art keywords
capacitor
current source
controlled current
frequency modulator
bistable circuit
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
FR7534402A
Other languages
English (en)
Other versions
FR2291648B1 (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.)
Ampex Corp
Original Assignee
Ampex 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 Ampex Corp filed Critical Ampex Corp
Publication of FR2291648A1 publication Critical patent/FR2291648A1/fr
Application granted granted Critical
Publication of FR2291648B1 publication Critical patent/FR2291648B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/06—Frequency or rate modulation, i.e. PFM or PRM
FR7534402A 1974-11-18 1975-11-12 Modulateur de frequence comprenant un condensateur, une source de courant commandee et un circuit bistable Granted FR2291648A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/524,656 US3944949A (en) 1974-11-18 1974-11-18 Frequency modulator

Publications (2)

Publication Number Publication Date
FR2291648A1 true FR2291648A1 (fr) 1976-06-11
FR2291648B1 FR2291648B1 (fr) 1981-08-07

Family

ID=24090135

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7534402A Granted FR2291648A1 (fr) 1974-11-18 1975-11-12 Modulateur de frequence comprenant un condensateur, une source de courant commandee et un circuit bistable

Country Status (9)

Country Link
US (1) US3944949A (fr)
JP (1) JPS5237755A (fr)
AT (1) AT346938B (fr)
BE (1) BE835311A (fr)
CA (1) CA1060553A (fr)
DE (1) DE2551785C3 (fr)
FR (1) FR2291648A1 (fr)
GB (1) GB1513583A (fr)
NL (1) NL168381C (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643949C3 (de) * 1976-09-29 1981-06-19 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum impulsmäßigen Übertragen von analogen Spannungswerten beider Polaritäten
JPS5932163A (ja) * 1982-08-18 1984-02-21 Nec Corp Ｃｍｏｓ集積回路
DE3413143A1 (de) * 1984-04-07 1985-10-17 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Fm-modulator
DE3425671A1 (de) * 1984-07-12 1986-01-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und vorrichtung zum messen der daempfung an lichtwellenleitern
GB2189113B (en) * 1986-04-12 1990-04-25 Thorn Emi Datatech Ltd A voltage-controlled oscillator
DE4013087A1 (de) * 1990-04-25 1991-10-31 Dierk Bobzin Verfahren zur pulsbreitenmodulation/demodulation, insbesondere zur aufzeichnung von videosignalen auf magnetische und optische datentraeger (parallelmodulator)
US7106130B2 (en) * 2003-09-05 2006-09-12 Delta Electronics, Inc. Variable frequency PWM controller circuit
JP2006020171A (ja) * 2004-07-02 2006-01-19 Fujitsu Ltd 差動型コンパレータ、アナログ・デジタル変換装置、撮像装置
US20060057864A1 (en) * 2004-09-13 2006-03-16 Joseph Jeffrey A Rotative electrical coupling
TWI306326B (en) * 2006-03-10 2009-02-11 Weltrend Semiconductor Inc Pulse frequency modulation oscillating circuit for a dc/dc converter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290617A (en) * 1962-07-09 1966-12-06 Northern Electric Co Frequency modulated relaxation oscillator
US3371291A (en) * 1965-01-11 1968-02-27 Astrodata Inc Current control of oscillator frequency
US3328724A (en) * 1966-01-26 1967-06-27 John L Way Voltage controlled free-running flip-flop oscillator
US3528036A (en) * 1968-07-12 1970-09-08 Ibm Fm modulator for video recording
US3581239A (en) * 1969-03-05 1971-05-25 Motorola Inc Frequency modulated crystal controlled oscillator operable at a plurality of temperature compensated center frequencies
JPS4866361A (fr) * 1971-12-14 1973-09-11
JPS4960468A (fr) * 1972-10-09 1974-06-12
US3794934A (en) * 1972-11-02 1974-02-26 Gte Sylvania Inc Non-saturating oscillator and modulator circuit
US3842371A (en) * 1973-10-12 1974-10-15 Honeywell Inc Voltage to frequency converter
JPS50156864A (fr) * 1974-06-06 1975-12-18

Also Published As

Publication number Publication date
US3944949A (en) 1976-03-16
NL168381B (nl) 1981-10-16
NL168381C (nl) 1982-03-16
FR2291648B1 (fr) 1981-08-07
DE2551785B2 (de) 1979-03-01
DE2551785A1 (de) 1976-05-20
JPS5237755A (en) 1977-03-23
BE835311A (fr) 1976-03-01
CA1060553A (fr) 1979-08-14
DE2551785C3 (de) 1979-10-31
GB1513583A (en) 1978-06-07
NL7513453A (nl) 1976-05-20
AT346938B (de) 1978-12-11
ATA874575A (de) 1978-04-15

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Legal Events

Date Code Title Description
ST Notification of lapse