GB425035A - Improvements in apparatus for producing electrical oscillations of saw-tooth and like wave form - Google Patents

Improvements in apparatus for producing electrical oscillations of saw-tooth and like wave form

Info

Publication number
GB425035A
GB425035A GB2185133A GB2185133A GB425035A GB 425035 A GB425035 A GB 425035A GB 2185133 A GB2185133 A GB 2185133A GB 2185133 A GB2185133 A GB 2185133A GB 425035 A GB425035 A GB 425035A
Authority
GB
United Kingdom
Prior art keywords
saw
grids
oscillator
tooth
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
GB2185133A
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
Priority to NL40069D priority Critical patent/NL40069C/xx
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB2185133A priority patent/GB425035A/en
Publication of GB425035A publication Critical patent/GB425035A/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
    • H03K4/12—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 voltage is produced across a capacitor
    • H03K4/16—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 voltage is produced across a capacitor using a single tube with positive feedback through transformer, e.g. blocking oscillator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronizing For Television (AREA)
  • Generation Of Surge Voltage And Current (AREA)

Abstract

425,035. Valve generating circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd., Blyth Road, Hayes, Middlesex, and CONDLIFFE, G. E., Thorncombe, Fulmer Road, Gerrards Cross, Buckinghamshire. Aug. 3, 1933, No. 21851. [Class 40 (v)] The invention relates to " blocking oscillators" producing oscillations of saw-tooth wave form controlled by received synchronizing pulses of peaked form such as employed for the line frequency and frame frequency in television reception. Its object is to preserve the sharp peaks of the synchronizing pulses and to prevent triggering of the line frequency oscillator by the frame frequency oscillator. Fig. 1 shows a known type of blocking oscillator and Fig. 2 an oscillator circuit according to the invention comprising a heptode valve. The synchronizing signals are applied between the control grid 9 and cathode ; grids 10 and 11 act as accelerating and decelerating electrodes respectively while the reactive coupling is effected between grids 12 and 13 through the usual iron-core transformer 18. 19 is the anode reservoir condenser across which the saw-tooth oscillations are produced. Grids 10 and 11 may in certain cases be dispensed with and the anode circuit may be coupled to grid 12, eliminating grid 13.
GB2185133A 1933-08-03 1933-08-03 Improvements in apparatus for producing electrical oscillations of saw-tooth and like wave form Expired GB425035A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL40069D NL40069C (en) 1933-08-03
GB2185133A GB425035A (en) 1933-08-03 1933-08-03 Improvements in apparatus for producing electrical oscillations of saw-tooth and like wave form

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2185133A GB425035A (en) 1933-08-03 1933-08-03 Improvements in apparatus for producing electrical oscillations of saw-tooth and like wave form

Publications (1)

Publication Number Publication Date
GB425035A true GB425035A (en) 1935-03-04

Family

ID=10169875

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2185133A Expired GB425035A (en) 1933-08-03 1933-08-03 Improvements in apparatus for producing electrical oscillations of saw-tooth and like wave form

Country Status (2)

Country Link
GB (1) GB425035A (en)
NL (1) NL40069C (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538261A (en) * 1947-09-09 1951-01-16 Philco Corp Synchronized relaxation oscillator
US2554925A (en) * 1947-10-17 1951-05-29 Rca Corp Saw-tooth wave generator
DE756631C (en) * 1937-11-04 1952-02-28 Emi Ltd Self-locking vibration generator with a block capacitor and discharge resistor in the cathode feed line of the blocking oscillator tube
DE895917C (en) * 1937-10-16 1953-11-09 Fernseh Gmbh Self-oscillating toggle circuit for generating saw tooth flows that generate an image grid that deviates from the rectangular shape
DE762989C (en) * 1936-02-24 1958-04-24 Fernseh Gmbh Einroehrenkippgeraet for the magnetic deflection of electron beams
DE757831C (en) * 1937-01-20 1958-04-24 Fernseh Gmbh Method for the synchronization of single-tube current tipping devices

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478606A (en) * 1945-03-14 1949-08-09 Rca Corp Electromagnetic deflection generator
US2690510A (en) * 1946-03-29 1954-09-28 Gordon D Forbes Blocking oscillator circuits

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE762989C (en) * 1936-02-24 1958-04-24 Fernseh Gmbh Einroehrenkippgeraet for the magnetic deflection of electron beams
DE757831C (en) * 1937-01-20 1958-04-24 Fernseh Gmbh Method for the synchronization of single-tube current tipping devices
DE895917C (en) * 1937-10-16 1953-11-09 Fernseh Gmbh Self-oscillating toggle circuit for generating saw tooth flows that generate an image grid that deviates from the rectangular shape
DE756631C (en) * 1937-11-04 1952-02-28 Emi Ltd Self-locking vibration generator with a block capacitor and discharge resistor in the cathode feed line of the blocking oscillator tube
US2538261A (en) * 1947-09-09 1951-01-16 Philco Corp Synchronized relaxation oscillator
US2554925A (en) * 1947-10-17 1951-05-29 Rca Corp Saw-tooth wave generator

Also Published As

Publication number Publication date
NL40069C (en)

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