GB523476A - Arrangements for producing oscillations of a sawtooth wave form - Google Patents

Arrangements for producing oscillations of a sawtooth wave form

Info

Publication number
GB523476A
GB523476A GB67/39A GB6739A GB523476A GB 523476 A GB523476 A GB 523476A GB 67/39 A GB67/39 A GB 67/39A GB 6739 A GB6739 A GB 6739A GB 523476 A GB523476 A GB 523476A
Authority
GB
United Kingdom
Prior art keywords
condenser
transformer
diode
valve
voltage
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
GB67/39A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB523476A publication Critical patent/GB523476A/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
    • H03K4/32—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 combined with means for generating the driving pulses
    • H03K4/34—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 combined with means for generating the driving pulses using a single tube with positive feedback through a transformer

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Amplifiers (AREA)

Abstract

523,476. Valve generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 2, 1939, No. 67. Convention date, Dec. 31, 1937. [Class 40 (v)] A uni-directional conducting device across part of the output transformer of a saw-tooth current generator causes the abrupt stroke. The condenser 7 is normally charged slowly through resistance 9 and a gradually increasing current flows in the valve anode circuit and is passed through transformer 12 to scanning coils 16. As the current flow rises the voltage on the anode of diode 19 which is connected across part or all the secondary 14 of transformer 12 is maintained negative. When the voltage across the condenser equals that impressed on the diode by the transformer, the condenser starts to discharge through the diode The plate current begins to decrease reversing the voltage on the plate of the diode so that the condenser discharge is accelerated and a rapid fly-back is obtained. When the condenser is discharged the cycle is repeated. Synchronizing impulses may be applied to the screen 4 of the valve 1. An embodiment using a triode for the valve 1 in which the synchronizing pulses are applied to the transformer winding 14 is also described.
GB67/39A 1937-12-31 1939-01-02 Arrangements for producing oscillations of a sawtooth wave form Expired GB523476A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US182779A US2165815A (en) 1937-12-31 1937-12-31 Generator for television

Publications (1)

Publication Number Publication Date
GB523476A true GB523476A (en) 1940-07-16

Family

ID=22669990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB67/39A Expired GB523476A (en) 1937-12-31 1939-01-02 Arrangements for producing oscillations of a sawtooth wave form

Country Status (2)

Country Link
US (1) US2165815A (en)
GB (1) GB523476A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440895A (en) * 1943-01-11 1948-05-04 Farnsworth Res Corp Wave generator
US2536804A (en) * 1945-06-29 1951-01-02 Stromberg Carlson Co Delayed pulse circuit arrangement
US2468420A (en) * 1945-12-11 1949-04-26 Rca Corp Blocking oscillator
NL132117C (en) * 1946-05-10
US2458365A (en) * 1946-09-11 1949-01-04 Motorola Inc Television receiver
US2554925A (en) * 1947-10-17 1951-05-29 Rca Corp Saw-tooth wave generator
GB645426A (en) * 1948-01-09 1950-11-01 Marconi Wireless Telegraph Co Improvements in or relating to saw tooth current wave generators
US2573284A (en) * 1948-10-16 1951-10-30 Rca Corp Oscillator
US2510670A (en) * 1949-02-10 1950-06-06 Garod Radio Corp Scan magnitude control for cathode-ray tubes
US2710353A (en) * 1949-02-28 1955-06-07 Hartford Nat Bank & Trust Co Blocking oscillator
BE495848A (en) * 1949-05-24
US2543719A (en) * 1949-07-29 1951-02-27 Rca Corp Deflection circuit

Also Published As

Publication number Publication date
US2165815A (en) 1939-07-11

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