US2193850A - Oscillation generator - Google Patents

Oscillation generator Download PDF

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Publication number
US2193850A
US2193850A US223804A US22380438A US2193850A US 2193850 A US2193850 A US 2193850A US 223804 A US223804 A US 223804A US 22380438 A US22380438 A US 22380438A US 2193850 A US2193850 A US 2193850A
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United States
Prior art keywords
potential
resistance
tube
current
control
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 - Lifetime
Application number
US223804A
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English (en)
Inventor
Andrieu Robert
Geiger Max
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Telefunken AG
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Telefunken AG
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Publication date
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
    • H04N5/123—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal directly commands a frequency generator
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising

Definitions

  • the curveshape of the current in the deflector coils or the curve-shape of the potential at the deflector plates for the slow picture co-ordinate must be extremely constant in order to prevent all risks and chances of a shift being caused in the two series of lines in relation to each other in the vertical sense.
  • the basic idea of the invention is to devise ways and means which, in dependence upon the initiation of the current or voltage shape in the time-base circuits, will diminish or eliminate the further controlling effect of the control current or the control potential.
  • Figure 1 shows one form of an oscillation generator
  • Figure 2 shows another form of an oscillation generator
  • FIG. 3 shows a modification of the oscillation generator shown in Figure 2;
  • Figure 4 shows still another iormof a generator
  • Figure 5 shows. the control or synchronizing of a conventional multivibrator
  • I0 is a pentode;
  • the plate circuit of this tube includes a resistance II.
  • a coupling condenser l2 and; a resistance l3.
  • These two circuit elements insure coupling relation with a tube l4 comprised in the blocking-oscillator circuit organization.
  • the primary and secondary winding of the blocking oscillator have been designated by l5 and i6, respectively, while the resistance-condenser combination in its grid circuit bears the numeral ll.
  • l8 In the Plate circuit of tube It is included a resistance l8, while the screen-grid circuit thereof contains a resistance l9.
  • Associated with the screen grid of tube 14, through a coupling condenser 20, is the grid 3 of the pentode tube It), the requisite grid leak being indicated at 2
  • an arrangement such as illustrated in Figure 1 operates in this manner that a given control potential is impressed upon the control grid l of tube 10 in the form of a negative impulse a.
  • the plate current which has previously been flowing in the tube I0 is inter-. rupted and curt off, and as a further result a rise of potential is caused at the anode end of the resistance 1 I.
  • This rise of potential through the resistance-condenser coupling combination l3, l2 reaches the control grid of the blocking oscillator tube H which, up to that instant shall be assumed to have carried no plate current.
  • the plate current is zero as long as across the resistancecondenser combination H in the grid circuit of the blocking oscillator there still prevails a sufficiently high potential acting in the sense of the plus and minus signs there indicatai. But as a result of the rise of potential at the anode end of resistance ii, the control grid potential of tube It is raised'to a point where plate current begins to flow.
  • This current by virtue of the feedback relation established through transformer l5, I6, results in the initiation of a grid current; and this current, as well known, causes the condenser of combination ll to be charged more strongly in the sense of the plus and minus.
  • Figure 2 illustrates another exemplified embodiment in which the grid circuit of a blocking oscillator tube l4 (connected, as to the rest, in a circuit organization similar to that shown in Figure 1) includes a rectifier (diode) 22, that is, in parallel relation to the terminals 22 upon which the control potential is impressed.
  • Resistance 24 either is a separate resistance or else the inner resistance of the control-voltage so of supply.
  • FIG. 3 The desired voltage impulse which will be independent of the development and form of tential is supplied to the cathode of a blocking oscillator tube, and in which the control or piloting eflect is also discontinued and cut off by the aid of a rectifier is illustrated in Figure 3.
  • reference numerals i4-ll denote a blocking oscillator circuitorganization of the same nature as in Figure 2.
  • a transformer which furnishes an impulse a is designated by 25, the rectifier again bears numeral 22, while a series resistance or else the inner resistance of transformer is designated by 24.
  • the circuit organization in Figure 3 operat in this manner that, as soon as the impulse a is initiated, the bias potential of tube H which shall be assumed to be still blocked by the residual charge across the resistance-condenser combination I!
  • the plate-current impulse of the blocking oscillator also in this instance has a shape that is practically independent of the form of the control or piloting potential 0 as soon as the rectifier 22 becomes conductive.
  • the desired constant voltage impulse again is taken of! at the left-hand terminal of resistance It.
  • Figure 4 illustrates a circuit organization in which the control potential is fed to the cathode of a blocking oscillator tube by the direct or conductive way.
  • Reference numerals H to II and 22 have the same denotations as in Figure 3.
  • a tube connected below the blocking oscillator is designated by 28, its plate resistance is indicated at 21, while a resistance and condenser which serve to establish plate coupling is indicated at 28, 29. Between the elements 28, 22
  • circuit organization illustrated in Figure 5 relates to the control or synchronization of a multivibrator which, as known in the prior art,
  • Rectifier 22 is included in the cathode lead of tube 3!.
  • 32 designates a high resistance.
  • FIG. 6 The embodiment shown in Figure 6 in which the condenser 40 is disregarded, for the time being, comprises the use of a rectifier arrangement of the kind illustrated in Figures 2 to 5 in the screen-grid circuit of a blocking oscillator tube M.
  • the reference numerals [5 to l8 have the same denotations as in Figures 1 to 5.
  • the rectifier is designated by 22, the terminals for the leads of the control or pilot potential by 23, while the series or inner resistance of the control-potential source are indicated by 24.
  • the circuit organization shown in Figure 6 operates in this manner that upon rise of control voltage b the screen-grid potential of tube M which up to that instant shall be taken to be blocked by virtue of the action of a residual potential or charge at the resistance-condenser mesh I1, is raised so that a plate current starts to flow.
  • This current is related to a screen-grid current which across the resistance 24 causes a drop of potential in the sense of the legended plus and minus signs.
  • the rectifier 22 is rendered conducting so that the pilot potential comes to act almost entirely at the resistance 24, while at thescreen grid there prevails a practically constant potential regardless of the further development or trend of the pilot potential through the rectifier 22.
  • the platecurrent impulse therefore, from the very beginning of current flow in the rectifier 22, will develop almost wholly independently of the control voltage pulse 11.
  • the desired constant voltage impulse again is collected at the left-hand terminal of the resistance l8.
  • Figure 7 shows a circuit organization in which the control potential for a blocking oscillator is fed to the plate.
  • the rectifier 22 is inserted between the positive plate potentlal terminal and the primary coil I5, while resistance I8 is included in the cathode lead of the blocking oscillator M.
  • the circuit arrangement of this tube resembles the organizations shown'and described in the previous embodiments.
  • Terminals 23 for the supply of the control potential and resistance 24 also are related to the rectifier so far as their position or connection is concerned in a way as before described.
  • the arrangement Fig ire 7 works in this manner that across the terminals 23 a positive potential impulse b is impressed which renders conductive the tube II (which previously had been blocked because of the residual charge of the resistance-condenser mesh II) by virtue of the fact that the plate potential is raised.
  • the ensuing plate current occasions across the resistance 24 a drop of voltage in the sense of the indicated plus and minus signs so that the rectifier 22 also begins to conduct current. From that instant, the rectifier 22 practically short-circuits the pilot potential 17, and the plate current fiows through the rectifier 22.
  • At the cathode of tube M from the very instant when rectifier 22 begins to carry current, there may thus be taken off a potential impulse which is practically independent of the shape of the voltage pulse b.
  • the invention is not restricted to the control or piloting of blocking oscillators or multi-vibrators.
  • all time-base organizations with features as set forth at, the outset may be run on the principle hereinbefore described.
  • Thyratrons arc-like discharge
  • circuit organizations of a kind shown in Figures 3, 4 and 7 are readily adaptable to time-base arrangements comprising such discharge tubes.
  • Circuit organizations of the kind here disclosed are advantageously serviceable, for instance, also in the case where by the aid of a perforated disc and a photo-electric cell a series of impulses is to be produced in which each individual impulse has exactly the same form.
  • a perforated disc is used, for the reason that the holes are not always of exactly the same size from the outset or that they may be partly clogged by dust and dirt.
  • These irregularities may be almost completely eliminated by a circuit organization as here disclosed, for the reason that the curve-shape of the control potential plays no longer any essential part in the present invention.
  • a system for generating voltages of saw tooth wave form comprising a discharge tube hav-- ing a cathode, a control electrode and an anode, circuit means for maintaining said anode positive with respect to said cathode, means for electromagnetically coupling the control electrode to the anode circuit, a diode including cathode and anode electrodes, means for connecting the control electrode of said discharge tube to the cathode of said diode comprising a parallel resistancecondenser combination, means for connecting the anode of said diode to the cathode of said discharge tube, and means for applying potential impulses to the electrodes of said diode.
  • a system for generating voltages of sawtooth wave form comprising a discharge tube having a cathode, a control electrode and an anode, circuit means for maintaining said anode positive with respect to said cathode, means for electro-magnetically coupling the control electrode to the anode circuit, a diode including cathode and anode electrodes, means for conmeeting the anode of said diode to the cathode of said discharge tube, means for connecting the control electrode of said discharge tube to the cathode of said diode comprising a parallel resistance-condenser combination, and means including a resistance for applying potential impulses to the electrodes of said diode.
  • a system for generating voltages of sawtooth wave form comprising a discharge tube having a cathode, a control electrode and an anode, circuit means for maintaining said anode positive with respect to said cathode, means for electro-magnetically coupling the control electrode to the anode circuit, a diode including cathode and anode electrodes, means for connecting the anode of said diode to the cathode of said discharge tube, means for connecting the control electrode of said discharge tube to the cathode of said diode comprising a parallel resistancecondenser combination, and means for applying potential impulses to the electrodes of said didode, said last named means including an additional electron discharge device.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Particle Accelerators (AREA)
  • Details Of Television Scanning (AREA)
US223804A 1937-04-24 1938-08-09 Oscillation generator Expired - Lifetime US2193850A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET2206D DE881705C (de) 1937-04-24 1937-04-24 Schaltungsanordnung zur Erzeugung eines stets gleichen Verlaufs der Kippschwingungen in fremdgesteuerten Kippschaltungen

Publications (1)

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US2193850A true US2193850A (en) 1940-03-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
US223804A Expired - Lifetime US2193850A (en) 1937-04-24 1938-08-09 Oscillation generator

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US (1) US2193850A (en)van)
BE (1) BE427630A (en)van)
DE (1) DE881705C (en)van)
FR (1) FR836860A (en)van)
NL (1) NL54023C (en)van)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430725A (en) * 1943-11-12 1947-11-11 Rca Corp Triggering system for obtaining a sharp-sided output pulse shorter than the input pulse
US2432227A (en) * 1943-08-24 1947-12-09 Westinghouse Electric Corp Pulsed oscillator
US2438845A (en) * 1942-06-26 1948-03-30 Vickers Electrical Co Ltd Relaxation circuits for producing electrical impulses at regular recurrence frequencies
US2445448A (en) * 1944-07-27 1948-07-20 Rca Corp Electron discharge device trigger circuit
US2445933A (en) * 1945-01-23 1948-07-27 Du Mont Allen B Lab Inc Controlled blocking tube oscillator
US2451997A (en) * 1944-06-02 1948-10-19 Weltronic Co Electronic timing control system
US2456089A (en) * 1946-06-26 1948-12-14 Rca Corp Wide band frequency modulator
US2457062A (en) * 1944-08-02 1948-12-21 Philco Corp Quenched amplifier system
US2479954A (en) * 1944-04-29 1949-08-23 Philco Corp Pulse delay system
US2489824A (en) * 1943-12-24 1949-11-29 Rca Corp Square wave generator with impulse counter timing control for frequency division
US2507211A (en) * 1942-12-24 1950-05-09 Gen Electric Pulse receiver circuit
US2512355A (en) * 1947-06-30 1950-06-20 Westinghouse Electric Corp X-ray thickness gauge
US2513954A (en) * 1942-09-28 1950-07-04 Gen Electric Synchronized pulse generator
US2527462A (en) * 1944-09-05 1950-10-24 Hartford Nat Bank & Trust Comp Saw-tooth oscillation generator
US2536853A (en) * 1949-03-25 1951-01-02 Philco Corp Saw-tooth current generator
US2548953A (en) * 1948-06-18 1951-04-17 Hughes Henry & Son Ltd Electric pulse generating circuit
US2550016A (en) * 1947-09-03 1951-04-24 Beautymaster Inc Oscillating apparatus
US2551771A (en) * 1944-08-30 1951-05-08 Philco Corp Electrical pulse generator
US2562941A (en) * 1946-03-20 1951-08-07 Standard Telephones Cables Ltd Sweep generator
US2595220A (en) * 1949-03-30 1952-05-06 Deering Milliken Res Trust Production and utilization of control signals
US2605406A (en) * 1945-12-12 1952-07-29 Everhard H B Bartelink Multivibrator saw-tooth generator
US2605404A (en) * 1945-10-09 1952-07-29 Jr George E Valley Pulse generator
US2616954A (en) * 1945-07-05 1952-11-04 Thomas A Prugh Electrical apparatus
US2653236A (en) * 1946-04-02 1953-09-22 John K Phelan Frequency dividing circuit
US2688696A (en) * 1946-02-05 1954-09-07 Pierce E Reeves Pulse generating system
US2690510A (en) * 1946-03-29 1954-09-28 Gordon D Forbes Blocking oscillator circuits
US2850648A (en) * 1955-03-18 1958-09-02 Gen Dynamics Corp Pulse generating circuit
US2963593A (en) * 1957-02-21 1960-12-06 Gen Electric Cross-coupled multivibrator selectively operable either monostably or bistably
US2976489A (en) * 1956-08-08 1961-03-21 North American Aviation Inc Blocking oscillator
US3241088A (en) * 1956-01-12 1966-03-15 Gen Motors Corp Transistor oscillator feedback circuit

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438845A (en) * 1942-06-26 1948-03-30 Vickers Electrical Co Ltd Relaxation circuits for producing electrical impulses at regular recurrence frequencies
US2513954A (en) * 1942-09-28 1950-07-04 Gen Electric Synchronized pulse generator
US2507211A (en) * 1942-12-24 1950-05-09 Gen Electric Pulse receiver circuit
US2432227A (en) * 1943-08-24 1947-12-09 Westinghouse Electric Corp Pulsed oscillator
US2430725A (en) * 1943-11-12 1947-11-11 Rca Corp Triggering system for obtaining a sharp-sided output pulse shorter than the input pulse
US2489824A (en) * 1943-12-24 1949-11-29 Rca Corp Square wave generator with impulse counter timing control for frequency division
US2479954A (en) * 1944-04-29 1949-08-23 Philco Corp Pulse delay system
US2451997A (en) * 1944-06-02 1948-10-19 Weltronic Co Electronic timing control system
US2445448A (en) * 1944-07-27 1948-07-20 Rca Corp Electron discharge device trigger circuit
US2457062A (en) * 1944-08-02 1948-12-21 Philco Corp Quenched amplifier system
US2551771A (en) * 1944-08-30 1951-05-08 Philco Corp Electrical pulse generator
US2527462A (en) * 1944-09-05 1950-10-24 Hartford Nat Bank & Trust Comp Saw-tooth oscillation generator
US2445933A (en) * 1945-01-23 1948-07-27 Du Mont Allen B Lab Inc Controlled blocking tube oscillator
US2616954A (en) * 1945-07-05 1952-11-04 Thomas A Prugh Electrical apparatus
US2605404A (en) * 1945-10-09 1952-07-29 Jr George E Valley Pulse generator
US2605406A (en) * 1945-12-12 1952-07-29 Everhard H B Bartelink Multivibrator saw-tooth generator
US2688696A (en) * 1946-02-05 1954-09-07 Pierce E Reeves Pulse generating system
US2562941A (en) * 1946-03-20 1951-08-07 Standard Telephones Cables Ltd Sweep generator
US2690510A (en) * 1946-03-29 1954-09-28 Gordon D Forbes Blocking oscillator circuits
US2653236A (en) * 1946-04-02 1953-09-22 John K Phelan Frequency dividing circuit
US2456089A (en) * 1946-06-26 1948-12-14 Rca Corp Wide band frequency modulator
US2512355A (en) * 1947-06-30 1950-06-20 Westinghouse Electric Corp X-ray thickness gauge
US2550016A (en) * 1947-09-03 1951-04-24 Beautymaster Inc Oscillating apparatus
US2548953A (en) * 1948-06-18 1951-04-17 Hughes Henry & Son Ltd Electric pulse generating circuit
US2536853A (en) * 1949-03-25 1951-01-02 Philco Corp Saw-tooth current generator
US2595220A (en) * 1949-03-30 1952-05-06 Deering Milliken Res Trust Production and utilization of control signals
US2850648A (en) * 1955-03-18 1958-09-02 Gen Dynamics Corp Pulse generating circuit
US3241088A (en) * 1956-01-12 1966-03-15 Gen Motors Corp Transistor oscillator feedback circuit
US2976489A (en) * 1956-08-08 1961-03-21 North American Aviation Inc Blocking oscillator
US2963593A (en) * 1957-02-21 1960-12-06 Gen Electric Cross-coupled multivibrator selectively operable either monostably or bistably

Also Published As

Publication number Publication date
NL54023C (en)van) 1943-03-15
FR836860A (fr) 1939-01-27
BE427630A (en)van) 1938-06-30
DE881705C (de) 1953-07-02

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