GB746176A - Improvements in or relating to line time base circuits particularly for television receivers - Google Patents

Improvements in or relating to line time base circuits particularly for television receivers

Info

Publication number
GB746176A
GB746176A GB21488/52A GB2148852A GB746176A GB 746176 A GB746176 A GB 746176A GB 21488/52 A GB21488/52 A GB 21488/52A GB 2148852 A GB2148852 A GB 2148852A GB 746176 A GB746176 A GB 746176A
Authority
GB
United Kingdom
Prior art keywords
bias
line time
relating
time base
resistor
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
GB21488/52A
Inventor
Kenneth Edward Martin
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.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve Co 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 Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Publication of GB746176A publication Critical patent/GB746176A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • H03K4/28—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as a switching device
    • 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
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Television Receiver Circuits (AREA)

Abstract

746,176. Saw-tooth generating circuits. MULLARD RADIO VALVE CO., Ltd. July 31, 1953 [Aug. 26, 1952], No. 21488/52. Class 40(6). In a line time-base generator of the type in which an efficiency diode and an H.T. boost capacitor are connected across an inductive output circuit of the generator, the cathode bias resistor of the output valve has a negative temperature coefficient so that its value varies inversely with the current through it. This prevents excessive screen grid current flowing before the efficiency diode cathode has warmed up sufficiently to provide the H.T. potential for the output valve anode. Additional protection can be provided by making the resistor such that when hot it still provides too much bias and by backing off this bias with a voltage obtained from the boost condenser 3 when it charges up. Specification 746,175 is referred to.
GB21488/52A 1952-08-26 1952-08-26 Improvements in or relating to line time base circuits particularly for television receivers Expired GB746176A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21436/52A GB746175A (en) 1952-08-26 1952-08-26 Improvements in or relating to line time base circuits particularly for television receivers

Publications (1)

Publication Number Publication Date
GB746176A true GB746176A (en) 1956-03-14

Family

ID=10162927

Family Applications (2)

Application Number Title Priority Date Filing Date
GB21436/52A Expired GB746175A (en) 1952-08-26 1952-08-26 Improvements in or relating to line time base circuits particularly for television receivers
GB21488/52A Expired GB746176A (en) 1952-08-26 1952-08-26 Improvements in or relating to line time base circuits particularly for television receivers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB21436/52A Expired GB746175A (en) 1952-08-26 1952-08-26 Improvements in or relating to line time base circuits particularly for television receivers

Country Status (4)

Country Link
US (1) US2838662A (en)
FR (2) FR1086936A (en)
GB (2) GB746175A (en)
NL (1) NL180851C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE25772E (en) * 1959-09-02 1965-05-04 Time-base circuit for magnetic beam deflection

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE21400E (en) * 1932-04-04 1940-03-19 blumlein
GB482370A (en) * 1936-08-27 1938-03-28 Eric Lawrence Casling White Improvements in or relating to oscillatory electric circuits
BE479538A (en) * 1947-01-14
US2543428A (en) * 1947-02-25 1951-02-27 Rca Corp Direct-current transfer system
US2565392A (en) * 1949-04-16 1951-08-21 Tele Tone Radio Corp Horizontal deflection circuit
NL163667B (en) * 1951-08-31 Hitachi Ltd FRONT PLATE FOR A COLOR TUBE.

Also Published As

Publication number Publication date
US2838662A (en) 1958-06-10
NL180851C (en)
FR1086937A (en) 1955-02-17
FR1086936A (en) 1955-02-17
GB746175A (en) 1956-03-14

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