GB846058A - Television receiver circuit - Google Patents

Television receiver circuit

Info

Publication number
GB846058A
GB846058A GB37538/58A GB3753858A GB846058A GB 846058 A GB846058 A GB 846058A GB 37538/58 A GB37538/58 A GB 37538/58A GB 3753858 A GB3753858 A GB 3753858A GB 846058 A GB846058 A GB 846058A
Authority
GB
United Kingdom
Prior art keywords
network
emphasizing
frequency
resistor
television receiver
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
GB37538/58A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB846058A publication Critical patent/GB846058A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/165—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level to maintain the black level constant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/213—Circuitry for suppressing or minimising impulsive noise
    • 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
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • 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
    • H04N5/52—Automatic gain control
    • H04N5/53—Keyed automatic gain control

Abstract

846,058. Television. STANDARD TELEPHONES & CABLES Ltd. Nov. 21, 1958 [Dec. 24, 1957], No. 37538/58. Class 40(3). A high-frequency emphasizing network L1, C1 in the cathode circuit of video amplifier R01 is controlled by a potentiometer P in common with a high-frequency de-emphasizing network L2 in the cathode circuit of sync. separator stage R02 in such manner that the effect of the former is offset by the latter. In a second embodiment, Fig. 3 (not shown), the de-emphasizing network comprises resistor-capacitor integrating network in the grid circuit of the separator stage, the resistor being variable and coupled mechanically to a variable resistor in the emphasizing network. The invention is stated to be of use with signals where the picture component is distorted but not the synchronizing component, so that the use of high-frequency emphasis to effect correction would normally over-emphasize the synchronizing signals.
GB37538/58A 1956-05-25 1958-11-21 Television receiver circuit Expired GB846058A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEL24940A DE1062734B (en) 1956-05-25 1956-05-25 Circuit arrangement for differential equalization in television receivers
DEL27760A DE1046097B (en) 1956-05-25 1957-05-31 Circuit arrangement for achieving automatic gain control
DE846058X 1957-12-24

Publications (1)

Publication Number Publication Date
GB846058A true GB846058A (en) 1960-08-24

Family

ID=27207631

Family Applications (3)

Application Number Title Priority Date Filing Date
GB16529/57A Expired GB821119A (en) 1956-05-25 1957-05-24 Circuit arrangements for differential correction of television receivers
GB17354/58A Expired GB822158A (en) 1956-05-25 1958-05-30 Circuit arrangement for obtaining automatic gain control
GB37538/58A Expired GB846058A (en) 1956-05-25 1958-11-21 Television receiver circuit

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB16529/57A Expired GB821119A (en) 1956-05-25 1957-05-24 Circuit arrangements for differential correction of television receivers
GB17354/58A Expired GB822158A (en) 1956-05-25 1958-05-30 Circuit arrangement for obtaining automatic gain control

Country Status (4)

Country Link
BE (1) BE570344A (en)
DE (2) DE1062734B (en)
FR (7) FR1114362A (en)
GB (3) GB821119A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176180B (en) * 1956-11-07 1964-08-20 Fernseh Gmbh Circuit arrangement for limiting the amplitude of television signals
DE1184792B (en) * 1960-01-26 1965-01-07 Loewe Opta Ag Circuit arrangement for generating control voltage in television receivers
DE1242676B (en) * 1961-01-26 1967-06-22 Telefunken Patent Circuit arrangement for automatic gain control in television receivers
GB1043737A (en) * 1963-08-23 1966-09-28 Rank Bush Murphy Ltd Video signal processing circuit arrangement
US4400720A (en) * 1981-05-07 1983-08-23 Rca Corporation Dynamic de-emphasis compensation system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1988370A (en) * 1929-12-06 1935-01-15 Philadelphia Storage Battery Automatic volume control
US1990512A (en) * 1931-12-18 1935-02-12 Bell Telephone Labor Inc Radioreceiver
US2740071A (en) * 1950-05-11 1956-03-27 Columbia Broadcasting Syst Inc Television
DE970151C (en) * 1953-04-02 1958-08-21 Saba Gmbh Arrangement for noise suppression when receiving frequency-modulated vibrations
FR1111454A (en) * 1953-11-04 1956-02-27 Marconi Wireless Telegraph Co Improvements to electrical networks used for the adjustment and correction of the frequency response

Also Published As

Publication number Publication date
FR74441E (en) 1960-12-19
FR73548E (en) 1960-08-22
GB822158A (en) 1959-10-21
FR1114362A (en) 1956-04-11
FR72614E (en) 1960-04-22
FR74443E (en) 1960-12-19
FR74807E (en) 1961-03-03
FR73937E (en) 1960-10-31
GB821119A (en) 1959-09-30
DE1062734B (en) 1959-08-06
DE1046097B (en) 1958-12-11
BE570344A (en) 1961-09-08

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