GB474623A - Improvements relating to time base circuits particularly for television apparatus - Google Patents

Improvements relating to time base circuits particularly for television apparatus

Info

Publication number
GB474623A
GB474623A GB1315536A GB1315536A GB474623A GB 474623 A GB474623 A GB 474623A GB 1315536 A GB1315536 A GB 1315536A GB 1315536 A GB1315536 A GB 1315536A GB 474623 A GB474623 A GB 474623A
Authority
GB
United Kingdom
Prior art keywords
amplifier
condenser
voltage
deflector plate
grid
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
GB1315536A
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.)
WALTER HENRY STEVENS
AC Cossor Ltd
Original Assignee
WALTER HENRY STEVENS
AC Cossor 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 WALTER HENRY STEVENS, AC Cossor Ltd filed Critical WALTER HENRY STEVENS
Priority to GB1315536A priority Critical patent/GB474623A/en
Priority to FR821679D priority patent/FR821679A/en
Publication of GB474623A publication Critical patent/GB474623A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
    • H03K6/02—Amplifying pulses

Landscapes

  • Details Of Television Scanning (AREA)

Abstract

474,623. Valve generating circuits; television. COSSOR, Ltd., A. C., BEDFORD, L. H., and STEVENS, W. H. May 9, 1936, No. 13155. [Classes 40 (iii) and 40 (v)] A push-pull deflection voltage generator for a cathode-ray tube comprises a generator of exponential saw-tooth waves for the control of one deflector plate and an amplifier controlled from this generator, giving an output to control the other deflector plate ; the characteristic of the amplifier being such that the resultant saw-tooth voltage between the plates is approximately linear. Condenser C1, Fig. 1, is charged exponentially through resistance R1 from the 1500 volt source and is periodically discharged rapidly through the hard valve V2 which is normally biassed to cut-off by the resistance R7. Transformer windings L1, L2 are arranged to impress a positive voltage impulse on the grid when anode current flows, and a tertiary winding L3 is energized with synchronizing impulses to initiate discharges. The grid of the amplifier V3, normally biassed by the leak Rg, is fed with the saw-tooth oscillations by the potentiometer C2, C3, and a portion of the output is taken to the deflector plate PX2 through condenser CX2 from the potentiometer R3, R6. Inductance L4 compensates for stray capacities. The other deflector plate PX1 is fed through the coupling condenser CX1. A B C D, Fig. 2, represents the charging curve of C1, and CH the discharge ; the required voltage-time relationship between the plates being AE. The difference ex at any instant is shown by the curve FG and the amplifier V3 is so arranged to produce this curve of voltage-time relation on the plate PX2. According to the Provisional Specification, the input from a television radio receiver is applied to the grid of the synchronizing pentode V1, through a condenser C4. The filter R15, C15, C16 in the anode circuit separates the line and frame synchronizing impulses and causes them to appear separately across windings L3, L3<1> which are incorporated as tertiary windings of transformers in the line and frame signal generators.
GB1315536A 1936-05-09 1936-05-09 Improvements relating to time base circuits particularly for television apparatus Expired GB474623A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1315536A GB474623A (en) 1936-05-09 1936-05-09 Improvements relating to time base circuits particularly for television apparatus
FR821679D FR821679A (en) 1936-05-09 1937-05-10 Improvements to sawtooth-shaped voltage generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1315536A GB474623A (en) 1936-05-09 1936-05-09 Improvements relating to time base circuits particularly for television apparatus

Publications (1)

Publication Number Publication Date
GB474623A true GB474623A (en) 1937-11-04

Family

ID=10017876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1315536A Expired GB474623A (en) 1936-05-09 1936-05-09 Improvements relating to time base circuits particularly for television apparatus

Country Status (2)

Country Link
FR (1) FR821679A (en)
GB (1) GB474623A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE891717C (en) * 1945-06-01 1953-10-01 Philips Nv Device for generating a symmetrical saegezahnfoermigen current or such a voltage with two amplifier systems connected in push-pull

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE891717C (en) * 1945-06-01 1953-10-01 Philips Nv Device for generating a symmetrical saegezahnfoermigen current or such a voltage with two amplifier systems connected in push-pull

Also Published As

Publication number Publication date
FR821679A (en) 1937-12-10

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