GB736005A - Electronic time base circuits - Google Patents

Electronic time base circuits

Info

Publication number
GB736005A
GB736005A GB284552A GB284552A GB736005A GB 736005 A GB736005 A GB 736005A GB 284552 A GB284552 A GB 284552A GB 284552 A GB284552 A GB 284552A GB 736005 A GB736005 A GB 736005A
Authority
GB
United Kingdom
Prior art keywords
voltage
resistance
inductance
scan
output 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
GB284552A
Inventor
Alan Stone
Geoffrey Charles Gifkins
Harold Alfred Fairhurst
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.)
Murphy Radio Ltd
Original Assignee
Murphy Radio 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 Murphy Radio Ltd filed Critical Murphy Radio Ltd
Priority to GB284552A priority Critical patent/GB736005A/en
Publication of GB736005A publication Critical patent/GB736005A/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
    • H03K4/90—Linearisation of ramp; Synchronisation of pulses

Abstract

736,005. Sawtooth generating circuits. MURPHY RADIO, Ltd. Feb. 2, 1953 [Feb. 2, 1952], No. 2845/52. Class 40 (6). In a sawtooth generator in which during the long flank the output valve receives a rectangular input wave on its grid and is of low impedance, a voltage is injected into an additional impedance in the circuit of the output transformer and deflection coils to linearize the scan. The circuit shown is of the damping diode type with a boost capacitor and includes a pentode output valve operated in the low impedance condition below the knee of the anode voltage/anode current characteristic. Non linearity of the scanning stroke due to the resistance of the anode circuit is prevented by injecting a voltage from an additional transformer winding through a resistance 6 into an inductance 5 in series with the scanning coils. The resistance and inductance may be interchanged if the polarity of the voltage from the winding 7 is reversed. In Figs. 2, 3 and 11 are the conventional ganged inductances used to vary the amplitude of the scan without varying the inductive load on the output valve, and a resistance 12 is added to shape the voltage induced in inductance 8 to linearize the scan. Alternatively winding 7 may provide a compensating voltage in the manner illustrated in Fig. 1 and also supply the voltage for amplitude adjusting inductor 11 of Fig. 2.
GB284552A 1952-02-02 1952-02-02 Electronic time base circuits Expired GB736005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB284552A GB736005A (en) 1952-02-02 1952-02-02 Electronic time base circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB284552A GB736005A (en) 1952-02-02 1952-02-02 Electronic time base circuits

Publications (1)

Publication Number Publication Date
GB736005A true GB736005A (en) 1955-08-31

Family

ID=9747055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB284552A Expired GB736005A (en) 1952-02-02 1952-02-02 Electronic time base circuits

Country Status (1)

Country Link
GB (1) GB736005A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192433A (en) * 1962-02-03 1965-06-29 Fernseh Gmbh Circuit arrangement for modifying the deflection current waveform of transformer-coupled scan generators
FR2488091A1 (en) * 1980-08-04 1982-02-05 Rca Corp DEFLECTOR CIRCUIT WITH CORRECTION OF LINEARITY BY THE POWER TRANSFORMER
US5287043A (en) * 1988-03-31 1994-02-15 Brag Johan O Apparatus for automatically generating a correct CRT display regardless of timing signals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192433A (en) * 1962-02-03 1965-06-29 Fernseh Gmbh Circuit arrangement for modifying the deflection current waveform of transformer-coupled scan generators
FR2488091A1 (en) * 1980-08-04 1982-02-05 Rca Corp DEFLECTOR CIRCUIT WITH CORRECTION OF LINEARITY BY THE POWER TRANSFORMER
US5287043A (en) * 1988-03-31 1994-02-15 Brag Johan O Apparatus for automatically generating a correct CRT display regardless of timing signals

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