GB746175A - 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
GB746175A
GB746175A GB21436/52A GB2143652A GB746175A GB 746175 A GB746175 A GB 746175A GB 21436/52 A GB21436/52 A GB 21436/52A GB 2143652 A GB2143652 A GB 2143652A GB 746175 A GB746175 A GB 746175A
Authority
GB
United Kingdom
Prior art keywords
saw
tooth
diode
negative bias
valve
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
GB21436/52A
Inventor
Emlyn Jones
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
Priority to NLAANVRAGE7511930,A priority Critical patent/NL180851C/en
Application filed by Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Priority to GB21436/52A priority patent/GB746175A/en
Priority to GB21488/52A priority patent/GB746176A/en
Priority to FR1086936D priority patent/FR1086936A/en
Priority to FR1086937D priority patent/FR1086937A/en
Priority to US376484A priority patent/US2838662A/en
Publication of GB746175A publication Critical patent/GB746175A/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

Abstract

746,175. Saw-tooth generating circuits. MULLARD RADIO VALVE CO., Ltd. July 31, 1953 [Aug. 26, 1952], No. 21436/52. Class 40 (6). In a saw-tooth current generator of the type in which an efficiency diode and an H.T. boost capacitor are connected across its inductive output circuit a negative bias is applied to the control grid of the output valve which is reduced when the diode conducts by means dependent on the current therethrough. This prevents excessive screen grid current flowing during the period before the diode has warmed up sufficiently to provide the H.T. potential for the output valve anode. In the circuit shown, the negative bias is offset by a voltage fed to the grid from a resistor 8 and obtained from the boost capacitor 4 when it has charged. In a television receiver the negative bias may be obtained by rectifying a voltage appearing in the valve heater chain or derived from the frame time-base (Figs. 2 and 3, not shown). Alternatively, the negative voltage from a blocking oscillator driving the saw-tooth generator may be used. Specification 746,176 is referred to.
GB21436/52A 1952-08-26 1952-08-26 Improvements in or relating to line time base circuits particularly for television receivers Expired GB746175A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NLAANVRAGE7511930,A NL180851C (en) 1952-08-26 PROCESS FOR PREPARING A HAND WASHING PASTE.
GB21436/52A GB746175A (en) 1952-08-26 1952-08-26 Improvements in or relating to line time base circuits particularly for television receivers
GB21488/52A GB746176A (en) 1952-08-26 1952-08-26 Improvements in or relating to line time base circuits particularly for television receivers
FR1086936D FR1086936A (en) 1952-08-26 1953-08-25 Assembly intended to generate a sawtooth current
FR1086937D FR1086937A (en) 1952-08-26 1953-08-25 Sawtooth current generator
US376484A US2838662A (en) 1952-08-26 1953-08-25 Circuit-arrangement producing sawtooth currents

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
GB746175A true GB746175A (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 After (1)

Application Number Title Priority Date Filing Date
GB21488/52A Expired GB746176A (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
FR959555A (en) * 1947-01-14 1950-03-31
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
BE513823A (en) * 1951-08-31

Also Published As

Publication number Publication date
NL180851C (en)
US2838662A (en) 1958-06-10
GB746176A (en) 1956-03-14
FR1086937A (en) 1955-02-17
FR1086936A (en) 1955-02-17

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