GB1349640A – Device for processing a frequency-modulated wave
– Google Patents
GB1349640A – Device for processing a frequency-modulated wave
– Google Patents
Device for processing a frequency-modulated wave
Info
Publication number
GB1349640A
GB1349640A
GB961073A
GB961073A
GB1349640A
GB 1349640 A
GB1349640 A
GB 1349640A
GB 961073 A
GB961073 A
GB 961073A
GB 961073 A
GB961073 A
GB 961073A
GB 1349640 A
GB1349640 A
GB 1349640A
Authority
GB
United Kingdom
Prior art keywords
oscillator
signal
frequency
processing
demodulator
Prior art date
1972-02-28
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
GB961073A
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.)
Office de Radiodiffusion-Television Francaise
Original Assignee
Office de Radiodiffusion-Television Francaise
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.)
1972-02-28
Filing date
1973-02-27
Publication date
1974-04-10
1973-02-27
Application filed by Office de Radiodiffusion-Television Francaise
filed
Critical
Office de Radiodiffusion-Television Francaise
1974-04-10
Publication of GB1349640A
publication
Critical
patent/GB1349640A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
230000005540
biological transmission
Effects
0.000
abstract
1
230000001360
synchronised effect
Effects
0.000
abstract
1
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03C—MODULATION
H03C1/00—Amplitude modulation
H03C1/50—Amplitude modulation by converting angle modulation to amplitude modulation
Abstract
1349640 FM/AM converter; FM demodulator OFFICE DE RADIODIFFUSION – TELEVISION FRANCAISE 27 Feb 1973 [28 Feb 1972] 9610/73 Headings H3A and H3R An arrangement for processing an FM signal comprises a filter network 9 having a transmission coefficient which varies in a linear manner with frequency and a delay network 7, the two networks having their inputs connected to a common input 2 and their outputs connected to respective inputs of a mixer 15. The circuit may be used directly as a demodulator, Fig. 3 (not shown). If a further mixer 11, fed from an oscillator 13 is connected into the filter channel, Fig. 1, or the delay channel Fig. 2 (not shown), the circuit may be used to convert the FM signal to an AM signal whose carrier frequency is that of the oscillator 13. The output from the converter may be coupled to a synchronous detector, the carrier frequency signal for which is derived from oscillator 13, Fig. 4 (not shown).
GB961073A
1972-02-28
1973-02-27
Device for processing a frequency-modulated wave
Expired
GB1349640A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR7206662A
FR2173688B1
(en)
1972-02-28
1972-02-28
Publications (1)
Publication Number
Publication Date
GB1349640A
true
GB1349640A
(en)
1974-04-10
Family
ID=9094230
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB961073A
Expired
GB1349640A
(en)
1972-02-28
1973-02-27
Device for processing a frequency-modulated wave
Country Status (11)
Country
Link
US
(1)
US3813617A
(en)
JP
(1)
JPS5740681B2
(en)
BE
(1)
BE795892A
(en)
CA
(1)
CA1000372A
(en)
CH
(1)
CH570073A5
(en)
DE
(1)
DE2304692C2
(en)
FR
(1)
FR2173688B1
(en)
GB
(1)
GB1349640A
(en)
IT
(1)
IT979307B
(en)
NL
(1)
NL174604C
(en)
SE
(1)
SE394062B
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS596524B2
(en)
*
1974-08-14
1984-02-13
ソニー株式会社
FM-AM converter
DE3124963A1
(en)
*
1981-06-25
1983-01-20
Philips Patentverwaltung Gmbh, 2000 Hamburg
ARRANGEMENT FOR DEMODULATING A FREQUENCY-MODULATED INPUT SIGNAL
Family Cites Families (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB556208A
(en)
*
1941-04-25
1943-09-24
Standard Telephones Cables Ltd
Arrangement for conversion of frequency modulation to phase modulation and the application thereof to the production of a frequency modulated wave from a frequency stable oscillator
US2976491A
(en)
*
1958-05-21
1961-03-21
Raytheon Co
Circuit responsive to amplitude and phase modulated wave and converting amplitude modulation into secondary phase modulation
NL235487A
(en)
*
1959-01-26
1964-02-25
DE1200891B
(en)
*
1962-04-09
1965-09-16
Pierre Brossard
Demodulator for frequency-modulated electrical high-frequency oscillations
BE631621A
(en)
*
1962-05-02
FR1388796A
(en)
*
1963-12-03
1965-02-12
Cft Comp Fse Television
Improvements to devices for converting a frequency modulated wave
US3387220A
(en)
*
1965-02-23
1968-06-04
Automatic Elect Lab
Apparatus and method for synchronously demodulating frequency modulated differentially coherent duobinary signals
0
BE
BE795892D
patent/BE795892A/en
not_active
IP Right Cessation
1972
1972-02-28
FR
FR7206662A
patent/FR2173688B1/fr
not_active
Expired
1973
1973-01-25
NL
NLAANVRAGE7301087,A
patent/NL174604C/en
not_active
IP Right Cessation
1973-01-31
DE
DE2304692A
patent/DE2304692C2/en
not_active
Expired
1973-02-21
IT
IT20625/73A
patent/IT979307B/en
active
1973-02-23
US
US00335299A
patent/US3813617A/en
not_active
Expired – Lifetime
1973-02-26
CA
CA164,586A
patent/CA1000372A/en
not_active
Expired
1973-02-26
CH
CH273873A
patent/CH570073A5/xx
not_active
IP Right Cessation
1973-02-26
SE
SE7302641A
patent/SE394062B/en
unknown
1973-02-27
JP
JP48023675A
patent/JPS5740681B2/ja
not_active
Expired
1973-02-27
GB
GB961073A
patent/GB1349640A/en
not_active
Expired
Also Published As
Publication number
Publication date
NL7301087A
(en)
1973-08-30
CA1000372A
(en)
1976-11-23
NL174604B
(en)
1984-02-01
BE795892A
(en)
1973-06-18
SE394062B
(en)
1977-05-31
JPS5740681B2
(en)
1982-08-30
US3813617A
(en)
1974-05-28
IT979307B
(en)
1974-09-30
NL174604C
(en)
1984-07-02
FR2173688A1
(en)
1973-10-12
DE2304692C2
(en)
1984-05-03
JPS48101864A
(en)
1973-12-21
FR2173688B1
(en)
1976-01-16
CH570073A5
(en)
1975-11-28
DE2304692A1
(en)
1973-09-13
Similar Documents
Publication
Publication Date
Title
ES487141A1
(en)
1980-09-16
Digital phase control circuit with auxiliary circuit.
GB960807A
(en)
1964-06-17
Improvements in or relating to demodulators for frequency modulated waves
GB1409681A
(en)
1975-10-15
Frequency discriminator
GB1349640A
(en)
1974-04-10
Device for processing a frequency-modulated wave
GB1075017A
(en)
1967-07-12
Improvements in fm/am converters
GB1270456A
(en)
1972-04-12
Radio receiving apparatus
GB1309339A
(en)
1973-03-07
Television receiver
GB620668A
(en)
1949-03-29
An improved arrangement for reducing the frequency band in the heterodyne reception of frequency-modulated oscillations
GB1124276A
(en)
1968-08-21
Angle modulated wave demodulating circuits
GB929025A
(en)
1963-06-19
Improvements in or relating to signal transmission systems
GB1445733A
(en)
1976-08-11
Underwater transmission system
JPS567527A
(en)
1981-01-26
High speed frequency division circuit
GB1150861A
(en)
1969-05-07
Frequency Modulation Detector
JPS529309A
(en)
1977-01-24
Muting circuit for fm receiver
JPS5580948A
(en)
1980-06-18
Fsk radio equipment
GB1307888A
(en)
1973-02-21
Amplifying and repeating circuit for angle modulated signals
JPS57143906A
(en)
1982-09-06
Fm demodulator for composite modulation system
ES426647A1
(en)
1976-07-16
Band limited fm detector
JPS551721A
(en)
1980-01-08
Multiplex radio unit
GB1099364A
(en)
1968-01-17
Improvements relating to apparatus for frequency modulated signals
GB1490382A
(en)
1977-11-02
Fm receivers
JPS5344156A
(en)
1978-04-20
Pll oscillation equipment
GB1296665A
(en)
1972-11-15
JPS57152235A
(en)
1982-09-20
Fm modulation and demodulation system
GB1125147A
(en)
1968-08-28
Improvements in or relating to travelling wave tube circuit arrangements
Legal Events
Date
Code
Title
Description
1974-08-21
PS
Patent sealed [section 19, patents act 1949]
1986-10-15
PCNP
Patent ceased through non-payment of renewal fee
