GB757593A - Improvements in or relating to sawtooth current generators - Google Patents

Improvements in or relating to sawtooth current generators

Info

Publication number
GB757593A
GB757593A GB1759853A GB1759853A GB757593A GB 757593 A GB757593 A GB 757593A GB 1759853 A GB1759853 A GB 1759853A GB 1759853 A GB1759853 A GB 1759853A GB 757593 A GB757593 A GB 757593A
Authority
GB
United Kingdom
Prior art keywords
grid
valve
voltage
sawtooth
driver
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
GB1759853A
Inventor
Maurice Charles Plumley
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1759853A priority Critical patent/GB757593A/en
Publication of GB757593A publication Critical patent/GB757593A/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

Landscapes

  • Details Of Television Scanning (AREA)

Abstract

757,593. Sawtooth generating circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd. June 25, 1954 [June 25, 1953], No. 17598/53. Class 40 (6). A sawtooth current generator of the resonant return type comprises a driver valve driven by pulses produced in the output valve of a sinusoidal oscillator. The Figure shows a convetional driver valve output circuit for producing a sawtooth current in a deflection coil 5 and comprising an H.T. boost capacitor 3 and a damping diode 6. The drive for the output valve is obtained from a sinusoidal oscillator valve 7 biased by a grid leak circuit such that anode current flows only during the peaks of the grid voltage waveform. The resulting current pulses through the valve 7 are made more rectangular by feeding back of voltage through a capacitor 16, the grid current limiting the peaks of the grid voltage and the resistor 11 being of such magnitude that the voltage fed back does not distort the sinusoidal voltage in the tuned circuit 8, 9. The feedback voltage may alternatively be obtained from a winding on transformer 2 or from an undecoupled resistor in the screen grid of a screened grid output valve. The point during the forward stroke at which the driver valve becomes conductive is adjusted by adjusting the width of the pulse on its grid and this is done by adjusting the value of the grid leak and thus the bias of valve 7.
GB1759853A 1953-06-25 1953-06-25 Improvements in or relating to sawtooth current generators Expired GB757593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1759853A GB757593A (en) 1953-06-25 1953-06-25 Improvements in or relating to sawtooth current generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1759853A GB757593A (en) 1953-06-25 1953-06-25 Improvements in or relating to sawtooth current generators

Publications (1)

Publication Number Publication Date
GB757593A true GB757593A (en) 1956-09-19

Family

ID=10097963

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1759853A Expired GB757593A (en) 1953-06-25 1953-06-25 Improvements in or relating to sawtooth current generators

Country Status (1)

Country Link
GB (1) GB757593A (en)

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