GB867778A - Improvements relating to blocking oscillators - Google Patents

Improvements relating to blocking oscillators

Info

Publication number
GB867778A
GB867778A GB2722457A GB2722457A GB867778A GB 867778 A GB867778 A GB 867778A GB 2722457 A GB2722457 A GB 2722457A GB 2722457 A GB2722457 A GB 2722457A GB 867778 A GB867778 A GB 867778A
Authority
GB
United Kingdom
Prior art keywords
frequency
blocking oscillator
transformer
oscillator
circuit
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
GB2722457A
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Publication of GB867778A publication Critical patent/GB867778A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H03K3/16—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using a transformer for feedback, e.g. blocking oscillator with saturable core
    • 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)
  • Lasers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

867,778. Valve blocking oscillator circuits. TELEFUNKEN G.m.b.H. Aug. 29, 1957 [Aug. 29, 1956], No. 27224/57. Class 40(6) The relaxation frequency of a blocking oscillator is stabilized by tuning a portion of the feedback transformer winding by a circuit connected in parallel with it and comprising the series connection of a capacitor and resistor. The frequency of the tuned circuit is an integral number of times the relaxation frequency and small compared with the frequency of the oscillation which occurs when the blocking oscillator is unblocked. Fig. 1 shows a blocking oscillator in which a sawtooth waveform is generated by charging capacitor 8 from the H.T. voltage U via resistor 9 and periodically discharging it through tube 1 of a blocking oscillator circuit. The repetition frequency of the oscillator may be varied by adjusting the value of resistor 7, the bias voltage U R or the inductance of transformer 3 and is stabilized by tuning winding 2 with capacitor 4 to a frequency which is preferably double the relaxation frequency of the oscillator. Resistor 5 limits the sinusoidal voltage generated by tuned circuit 2, 5 and prevents the high frequency components of the feedback pulse of the blocking oscillator from being shorted by the tuned circuit. In a modification, Fig. 2 (not shown) the blocking oscillator transformer is an auto-transformer. In a further modification shown in Fig. 3 the auto-transformer 13 provides feedback between cathode and control grid and has its bottom portion, tuned by circuit 4, 5.
GB2722457A 1956-08-29 1957-08-29 Improvements relating to blocking oscillators Expired GB867778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET12611A DE1014675B (en) 1956-08-29 1956-08-29 Blocking oscillator with an oscillating circuit which is used to stabilize the tilting frequency

Publications (1)

Publication Number Publication Date
GB867778A true GB867778A (en) 1961-05-10

Family

ID=7547074

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2722457A Expired GB867778A (en) 1956-08-29 1957-08-29 Improvements relating to blocking oscillators

Country Status (2)

Country Link
DE (1) DE1014675B (en)
GB (1) GB867778A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1201869B (en) * 1958-05-14 1965-09-30 Blechblas Und Signalinstrument Blocking oscillator circuit
DE1107270B (en) * 1958-07-12 1961-05-25 Reich Robert W Blocking oscillator circuit with transistor
FR1322291A (en) * 1962-02-15 1963-03-29 Auxilec Adjustable phase-shifting oscillator device

Also Published As

Publication number Publication date
DE1014675B (en) 1957-08-29

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