GB1362995A – Angle modulation detector
– Google Patents
GB1362995A – Angle modulation detector
– Google Patents
Angle modulation detector
Info
Publication number
GB1362995A
GB1362995A
GB3983371A
GB3983371A
GB1362995A
GB 1362995 A
GB1362995 A
GB 1362995A
GB 3983371 A
GB3983371 A
GB 3983371A
GB 3983371 A
GB3983371 A
GB 3983371A
GB 1362995 A
GB1362995 A
GB 1362995A
Authority
GB
United Kingdom
Prior art keywords
input
transistors
phase
modulation
signal
Prior art date
1970-08-26
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
GB3983371A
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.)
RCA Corp
Original Assignee
RCA 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.)
1970-08-26
Filing date
1971-08-25
Publication date
1974-08-14
1971-08-25
Application filed by RCA Corp
filed
Critical
RCA Corp
1974-08-14
Publication of GB1362995A
publication
Critical
patent/GB1362995A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
H03D3/18—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of synchronous gating arrangements
Abstract
1362995 Modulation detectors RCA CORPORATION 25 Aug 1971 [26 Aug 1970] 39833/71 Heading H3A An angular modulation quadrature detector comprises a phase detecting multiplier 318, 320; 322, 324 having first and second inputs connected to the detector input terminals 234, 236, a phase shifter 62 connected in one of the input paths, similar first and second emitter coupled differential amplifier limiters 310-312, 332- 334 placed in the two input paths so as to mutually compensate the phase delay variation with input amplitude variation produced in each amplifier limiter. An F.M. input signal is applied directly via limiter 310, 312 to the command emitter electrodes of the multiplier transistors 318-324 forming the first input and via limiter 332, 334 and the phase shifter 62 to the commoned bases of transistors 318, 322 forming the second input, the bases of transistors 320, 324 being coupled to a reference potential. The phase of the phase shifted signal from 62 depends on the modulation deviation of the input signal from the unmodulated carrier and hence the relative conduction angles of transistors 318, 320 into the detector load 380, 382 depends on the signal modulation. The limiters may be supplied with an operating current from a single or separate constant current sources 315. The #-shift network 62 may comprise a double-tuned transformer.
GB3983371A
1970-08-26
1971-08-25
Angle modulation detector
Expired
GB1362995A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US6694570A
1970-08-26
1970-08-26
Publications (1)
Publication Number
Publication Date
GB1362995A
true
GB1362995A
(en)
1974-08-14
Family
ID=22072737
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3983371A
Expired
GB1362995A
(en)
1970-08-26
1971-08-25
Angle modulation detector
Country Status (8)
Country
Link
US
(1)
US3667060A
(en)
JP
(1)
JPS5713167B1
(en)
AU
(1)
AU456370B2
(en)
CA
(1)
CA937292A
(en)
DE
(1)
DE2142661C3
(en)
FR
(1)
FR2103526B1
(en)
GB
(1)
GB1362995A
(en)
NL
(1)
NL175364C
(en)
Families Citing this family (9)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3701022A
(en)
*
1971-06-08
1972-10-24
Rca Corp
Peak-to-peak detector
JPS5928084B2
(en)
*
1975-04-24
1984-07-10
ソニー株式会社
Demodulation circuit
JPS5328361A
(en)
*
1976-08-27
1978-03-16
Sony Corp
Quadratur e phase detection circuit
JPS5855696B2
(en)
*
1976-12-11
1983-12-10
富士通テン株式会社
AM/FM frequency discriminator
JPS54128257A
(en)
*
1978-03-29
1979-10-04
Hitachi Ltd
Fm detection circuit
US4339726A
(en)
*
1979-08-29
1982-07-13
Nippon Electric Co., Ltd.
Demodulator of angle modulated signal operable by low power voltage
FR2514639B1
(en)
*
1981-10-15
1986-08-01
Oreal
COSMETIC COMPOSITIONS FOR MAKE-UP CONTAINING AS COLORED PIGMENTS A SALT OF AN ACID DYE AND A POLYMER CARRYING SALIFIED OR QUATERNIZED AMINE FUNCTIONS
JP2523988B2
(en)
*
1990-11-28
1996-08-14
松下電器産業株式会社
Quadrature detector
JP3003600B2
(en)
*
1996-11-20
2000-01-31
日本電気株式会社
FM demodulation circuit
Family Cites Families (9)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CH206044A
(en)
*
1937-07-11
1939-07-15
Sport Ag
Method and device for receiving frequency-modulated oscillations.
US3241078A
(en)
*
1963-06-18
1966-03-15
Honeywell Inc
Dual output synchronous detector utilizing transistorized differential amplifiers
FR1542253A
(en)
*
1966-11-04
1968-10-11
Nippon Electric Co
Frequency modulated signal demodulation system
US3508161A
(en)
*
1967-04-14
1970-04-21
Fairchild Camera Instr Co
Semiconductor circuit for high gain amplification or fm quadrature detection
US3500217A
(en)
*
1967-07-31
1970-03-10
Us Navy
Frequency discriminator employing quadrature demodulation techniques
US3548326A
(en)
*
1967-07-31
1970-12-15
Sprague Electric Co
Direct coupled limiter-discriminator circuit
US3519841A
(en)
*
1967-10-23
1970-07-07
Millipore Corp
Phase sensitive detector
NZ154478A
(en)
*
1967-11-15
US3519944A
(en)
*
1968-02-15
1970-07-07
Rca Corp
Angle modulation discriminator-detector circuit
1970
1970-08-26
US
US66945A
patent/US3667060A/en
not_active
Expired – Lifetime
1971
1971-08-06
AU
AU32083/71A
patent/AU456370B2/en
not_active
Expired
1971-08-09
CA
CA120145A
patent/CA937292A/en
not_active
Expired
1971-08-25
FR
FR7130877A
patent/FR2103526B1/fr
not_active
Expired
1971-08-25
JP
JP6505971A
patent/JPS5713167B1/ja
active
Pending
1971-08-25
NL
NLAANVRAGE7111701,A
patent/NL175364C/en
active
1971-08-25
DE
DE2142661A
patent/DE2142661C3/en
not_active
Expired
1971-08-25
GB
GB3983371A
patent/GB1362995A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE2142661C3
(en)
1981-08-13
US3667060A
(en)
1972-05-30
NL175364C
(en)
1984-10-16
AU3208371A
(en)
1973-02-08
FR2103526A1
(en)
1972-04-14
CA937292A
(en)
1973-11-20
NL7111701A
(en)
1972-02-29
DE2142661A1
(en)
1972-03-02
AU456370B2
(en)
1974-12-19
DE2142661B2
(en)
1973-03-08
FR2103526B1
(en)
1975-02-07
JPS5713167B1
(en)
1982-03-16
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Legal Events
Date
Code
Title
Description
1974-12-27
PS
Patent sealed [section 19, patents act 1949]
1989-07-12
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1991-09-25
PE20
Patent expired after termination of 20 years
