GB1487586A – Video amplifier circuit for use with synchronous detector
– Google Patents
GB1487586A – Video amplifier circuit for use with synchronous detector
– Google Patents
Video amplifier circuit for use with synchronous detector
Info
Publication number
GB1487586A
GB1487586A
GB52205/74A
GB5220574A
GB1487586A
GB 1487586 A
GB1487586 A
GB 1487586A
GB 52205/74 A
GB52205/74 A
GB 52205/74A
GB 5220574 A
GB5220574 A
GB 5220574A
GB 1487586 A
GB1487586 A
GB 1487586A
Authority
GB
United Kingdom
Prior art keywords
signals
transistor
pulses
dec
going
Prior art date
1973-12-28
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
GB52205/74A
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.)
1973-12-28
Filing date
1974-12-03
Publication date
1977-10-05
1974-12-03
Application filed by RCA Corp
filed
Critical
RCA Corp
1977-10-05
Publication of GB1487586A
publication
Critical
patent/GB1487586A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N5/00—Details of television systems
H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
H04N5/455—Demodulation-circuits
Abstract
1487586 Interference suppression in TV receivers; transistor absolute value amplifiers RCA CORPORATION 3 Dec 1974 [28 Dec 1973] 52205/74 Headings H4L and H3T In an amplitude modulation detector circuit (e.g. a synchronous detector in a T.V. receiver) which converts accompanying noise pulses 50 into two pulses 56, 57 of opposite polarity, the combined signal and converted noise is passed through a single channel in which one polarity is inverted to be the same as the other. This can ensure that both noise pulses are black-going. The conversion of bipolar signals to monopolar is effected by a transistor circuit (Fig. 2). Negative going signals at the input 212 are amplified normally but positive going signals cause the base-emitter path of transistor 201 to be forward biased so that the signals are passed to the base of 204 without inversion. The same effect is produced in Fig. 4, not shown, by a negative feedback differential amplifier having a reference voltage applied to the non-inverting input (3).
GB52205/74A
1973-12-28
1974-12-03
Video amplifier circuit for use with synchronous detector
Expired
GB1487586A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US429673A
US3862361A
(en)
1973-12-28
1973-12-28
Video amplifier circuit for use with synchronous detectors
Publications (1)
Publication Number
Publication Date
GB1487586A
true
GB1487586A
(en)
1977-10-05
Family
ID=23704255
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB52205/74A
Expired
GB1487586A
(en)
1973-12-28
1974-12-03
Video amplifier circuit for use with synchronous detector
Country Status (15)
Country
Link
US
(1)
US3862361A
(en)
JP
(1)
JPS5436009B2
(en)
AT
(1)
AT368339B
(en)
BE
(1)
BE823781A
(en)
BR
(1)
BR7410731D0
(en)
CA
(1)
CA1035429A
(en)
DE
(1)
DE2460264B2
(en)
DK
(1)
DK147029C
(en)
ES
(1)
ES432720A1
(en)
FI
(1)
FI61982C
(en)
FR
(1)
FR2256602B1
(en)
GB
(1)
GB1487586A
(en)
IT
(1)
IT1025805B
(en)
NL
(1)
NL7416932A
(en)
SE
(1)
SE399797B
(en)
Families Citing this family (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS6041493B2
(en)
*
1977-03-16
1985-09-17
ソニー株式会社
Receiving machine
US4253118A
(en)
*
1979-07-02
1981-02-24
Zenith Radio Corporation
Synchronous detection system
US4329712A
(en)
*
1980-06-24
1982-05-11
Rca Corporation
Adaptive distortion elimination circuitry for a video disc player
US4562475A
(en)
*
1984-03-15
1985-12-31
Rca Corporation
DC Restoration of synchronously detected CCD imager output signals
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3812921A
(en)
*
1972-07-24
1974-05-28
Zenith Radio Corp
Video signal processing system and method with above-white-level noise inversion
US3812289A
(en)
*
1972-11-06
1974-05-21
Rca Corp
Television receiver using synchronous video detection
1973
1973-12-28
US
US429673A
patent/US3862361A/en
not_active
Expired – Lifetime
1974
1974-11-07
CA
CA213,191A
patent/CA1035429A/en
not_active
Expired
1974-11-18
IT
IT29568/74A
patent/IT1025805B/en
active
1974-12-03
GB
GB52205/74A
patent/GB1487586A/en
not_active
Expired
1974-12-09
ES
ES432720A
patent/ES432720A1/en
not_active
Expired
1974-12-18
SE
SE7415895A
patent/SE399797B/en
unknown
1974-12-18
FR
FR7441794A
patent/FR2256602B1/fr
not_active
Expired
1974-12-19
DE
DE19742460264
patent/DE2460264B2/en
not_active
Withdrawn
1974-12-20
DK
DK669674A
patent/DK147029C/en
not_active
IP Right Cessation
1974-12-20
AT
AT1025274A
patent/AT368339B/en
not_active
IP Right Cessation
1974-12-20
FI
FI3712/74A
patent/FI61982C/en
active
1974-12-23
BE
BE151876A
patent/BE823781A/en
unknown
1974-12-23
BR
BR10731/74A
patent/BR7410731D0/en
unknown
1974-12-23
JP
JP754205A
patent/JPS5436009B2/ja
not_active
Expired
1974-12-27
NL
NL7416932A
patent/NL7416932A/en
not_active
Application Discontinuation
Also Published As
Publication number
Publication date
JPS50118618A
(en)
1975-09-17
ES432720A1
(en)
1977-02-16
FI61982C
(en)
1982-10-11
NL7416932A
(en)
1975-07-01
DK669674A
(en)
1975-08-18
SE7415895L
(en)
1975-06-30
ATA1025274A
(en)
1982-01-15
FR2256602B1
(en)
1978-07-13
AU7669674A
(en)
1976-06-24
DE2460264B2
(en)
1976-09-09
FI61982B
(en)
1982-06-30
DK147029B
(en)
1984-03-19
BE823781A
(en)
1975-04-16
FI371274A
(en)
1975-06-29
DE2460264A1
(en)
1975-07-10
BR7410731D0
(en)
1975-09-02
JPS5436009B2
(en)
1979-11-07
IT1025805B
(en)
1978-08-30
US3862361A
(en)
1975-01-21
SE399797B
(en)
1978-02-27
CA1035429A
(en)
1978-07-25
DK147029C
(en)
1984-08-27
AT368339B
(en)
1982-10-11
FR2256602A1
(en)
1975-07-25
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Legal Events
Date
Code
Title
Description
1978-02-15
PS
Patent sealed [section 19, patents act 1949]
1985-07-24
PCNP
Patent ceased through non-payment of renewal fee
