GB1500295A - Vertical deflection circuit for a cathode ray tube - Google Patents

Vertical deflection circuit for a cathode ray tube

Info

Publication number
GB1500295A
GB1500295A GB3744575A GB3744575A GB1500295A GB 1500295 A GB1500295 A GB 1500295A GB 3744575 A GB3744575 A GB 3744575A GB 3744575 A GB3744575 A GB 3744575A GB 1500295 A GB1500295 A GB 1500295A
Authority
GB
United Kingdom
Prior art keywords
coils
correction
line frequency
sawtooth
signal
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
GB3744575A
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.)
Indesit Industria Elettrodomestici Italiana SpA
Original Assignee
Indesit Industria Elettrodomestici Italiana SpA
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 Indesit Industria Elettrodomestici Italiana SpA filed Critical Indesit Industria Elettrodomestici Italiana SpA
Publication of GB1500295A publication Critical patent/GB1500295A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/233—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements

Abstract

1500295 Pin-cushion correction circuits INDESIT INDUSTRIAL ELETTRODOMESTICI ITALIANA SpA 11 Sept 1975 [27 Sept 1974] 37445/75 Heading H4T A circuit providing pin-cushion-corrected vertical deflection signals to the coils 11, 12 of a wideangle C.R.T. includes a generator 1 providing a vertical frequency sawtooth signal in response to vertical sync. pulses, and a modulation circuit for producing a low-level distortion-correction signal, both the sawtooth and the correction signals being fed to the coils via a common power amplifier 2. In the embodiment shown the signal at one end of the deflection coils is passed to low pass filter 17, 18, which has a cut-off below line frequency. This passes the sawtooth to modulator 19 where it is modulated by line frequency pulses H to provide the "butterfly" correction signal passed to amplifier 2. Inductor 9 and capacitor 10 form a circuit resonant at line frequency to increase the correction voltage across the coils. Amplifier 2 is associated with two feedback loops, one (6, 7, 8) having an untuned response and the other having a low pass filter 14-16 which has a cut-off below line frequency.
GB3744575A 1974-09-27 1975-09-11 Vertical deflection circuit for a cathode ray tube Expired GB1500295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6990374A IT1020883B (en) 1974-09-27 1974-09-27 CIRCUIT FOR VERTI CALE DEFLECTION IN A CATHODE-RAYED TUBE

Publications (1)

Publication Number Publication Date
GB1500295A true GB1500295A (en) 1978-02-08

Family

ID=11313071

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3744575A Expired GB1500295A (en) 1974-09-27 1975-09-11 Vertical deflection circuit for a cathode ray tube

Country Status (5)

Country Link
DE (1) DE2542880A1 (en)
FR (1) FR2286498A1 (en)
GB (1) GB1500295A (en)
IT (1) IT1020883B (en)
NL (1) NL7511305A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227912A (en) * 1986-05-12 1990-08-08 Rca Licensing Corp Deflection circuit with service switch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2605251B1 (en) * 1976-02-11 1977-07-07 Saba Gmbh Vertical deflection circuit for a cathode ray picture tube with a pincushion distortion correction circuit
DE3109611C2 (en) * 1981-03-13 1982-12-02 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Control circuit for a switched vertical deflection circuit of a television receiver
DE3135797C1 (en) * 1981-09-10 1983-03-31 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Circuit arrangement for generating a deflection current for the vertical deflection of the electron beam in a television receiver
DE3743352A1 (en) * 1987-12-21 1989-07-06 Electronic Werke Deutschland Pulsed vertical deflection circuit for a television receiver
DE3743459A1 (en) * 1987-12-22 1989-07-13 Electronic Werke Deutschland Pulse-triggered vertical deflection circuit for a television receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227912A (en) * 1986-05-12 1990-08-08 Rca Licensing Corp Deflection circuit with service switch
GB2227912B (en) * 1986-05-12 1991-02-06 Rca Licensing Corp Deflection circuit for video display apparatus

Also Published As

Publication number Publication date
IT1020883B (en) 1977-12-30
NL7511305A (en) 1976-03-30
DE2542880A1 (en) 1976-04-15
FR2286498A1 (en) 1976-04-23

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee