GB1081676A - Improvements in or relating to time-bases - Google Patents

Improvements in or relating to time-bases

Info

Publication number
GB1081676A
GB1081676A GB546564A GB546564A GB1081676A GB 1081676 A GB1081676 A GB 1081676A GB 546564 A GB546564 A GB 546564A GB 546564 A GB546564 A GB 546564A GB 1081676 A GB1081676 A GB 1081676A
Authority
GB
United Kingdom
Prior art keywords
field
line
frequency
sawtooth
coils
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
GB546564A
Inventor
Brian Ernest Attwood
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB546564A priority Critical patent/GB1081676A/en
Priority to NL6501395A priority patent/NL6501395A/xx
Priority to DE1965N0026178 priority patent/DE1273572B/en
Priority to FR4896A priority patent/FR1424229A/en
Publication of GB1081676A publication Critical patent/GB1081676A/en
Priority to GB2616868A priority patent/GB1260137A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)

Abstract

1,081,676. Cathode-ray tube circuits; transistor sawtooth circuits. MULLARD Ltd. Oct. 30, 1964 [Feb. 10, 1964], No: 5465/64. Headings H3T and H4T. In an arrangement for correcting pin-cushion distortion in a cathode-ray tube display by modulating the field sawtooth at line frequency, the field output stage comprises two transistors T1, T2 (Fig. 5) connected in a single-ended push-pull arrangement field sawtooth waves being fed to the base electrodes via terminal tf and oppositely phased line-frequency pulses derived from the line transformer via coils L10, L11 to the emitters and in order to prevent shunting of the line-frequency component by the low impedance of the field coils a capacitance CYS is employed in a circuit complex including the field coils LY and a field-frequency by-pass coil Lby to produce series resonance at line frequency. The non- linear characteristics of diodes instead of the input characteristics of the transistors may be utilized to effect the modulation of the field sawtooth by line-frequency signals (Figs. 6 and 7, not shown). An arrangement utilizing thermionic valves is described with reference to Figs. 3 and 4 (not shown) and the general problem is discussed with reference to Figs. 1 and 2 (not shown).
GB546564A 1964-02-10 1964-02-10 Improvements in or relating to time-bases Expired GB1081676A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB546564A GB1081676A (en) 1964-02-10 1964-02-10 Improvements in or relating to time-bases
NL6501395A NL6501395A (en) 1964-02-10 1965-02-04
DE1965N0026178 DE1273572B (en) 1964-02-10 1965-02-06 Raster output circuit for correcting the pincushion distortion in the vertical deflection
FR4896A FR1424229A (en) 1964-02-10 1965-02-09 Time base for an image reproduction system
GB2616868A GB1260137A (en) 1964-02-10 1968-05-31 Improvements in or relating to time-bases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB546564A GB1081676A (en) 1964-02-10 1964-02-10 Improvements in or relating to time-bases

Publications (1)

Publication Number Publication Date
GB1081676A true GB1081676A (en) 1967-08-31

Family

ID=9796686

Family Applications (2)

Application Number Title Priority Date Filing Date
GB546564A Expired GB1081676A (en) 1964-02-10 1964-02-10 Improvements in or relating to time-bases
GB2616868A Expired GB1260137A (en) 1964-02-10 1968-05-31 Improvements in or relating to time-bases

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2616868A Expired GB1260137A (en) 1964-02-10 1968-05-31 Improvements in or relating to time-bases

Country Status (4)

Country Link
DE (1) DE1273572B (en)
FR (1) FR1424229A (en)
GB (2) GB1081676A (en)
NL (1) NL6501395A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825776A (en) * 1971-12-21 1974-07-23 Ibm Switchable current generator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274631B (en) * 1967-01-14 1968-08-08 Telefunken Patent Circuit arrangement for tangent equalization in the event of a vertical deflection, in particular for a television receiver
GB1574506A (en) * 1976-05-26 1980-09-10 Philips Nv Line sawtooth deflection current generator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712094A (en) * 1954-08-11 1955-06-28 kochevar
US2906919A (en) * 1955-12-27 1959-09-29 Gen Electric Deflection circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825776A (en) * 1971-12-21 1974-07-23 Ibm Switchable current generator

Also Published As

Publication number Publication date
FR1424229A (en) 1966-01-07
DE1273572B (en) 1968-07-25
NL6501395A (en) 1965-08-11
GB1260137A (en) 1972-01-12

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