US2102951A - Generator of electric relaxation oscillations - Google Patents

Generator of electric relaxation oscillations Download PDF

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Publication number
US2102951A
US2102951A US89649A US8964936A US2102951A US 2102951 A US2102951 A US 2102951A US 89649 A US89649 A US 89649A US 8964936 A US8964936 A US 8964936A US 2102951 A US2102951 A US 2102951A
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Prior art keywords
condenser
generator
circuit
tube
charging
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Expired - Lifetime
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US89649A
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Hackenberg Edmund
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Alcatel Lucent Deutschland AG
C Lorenz AG
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Standard Elektrik Lorenz AG
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    • 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

Definitions

  • the invention relates to devices for generating electric relaxation oscillations, that is, oscillations of the kind having a saw-tooth shaped current curve. Devices of this nature are used in television systems and are necessary also in connectionwith certain measuring equipments.
  • Fig. 1 shows a saw-tooth curve in its ideal and also in its real appearance.
  • Fig. 2 is a wiring diagram of an embodiment of theinvention.
  • Fig. 1 the ideal saw-toothcurve is designated i.
  • the lower angles of this curve are acute while the curve really obtained is round at these angles as indicated bythe dotted curve w.
  • w the return movements of the beam of electrons are retarded in such a manner that there will be no image reproduction at a certain edge of the picture.
  • this drawback acts to impair the oscillographic representation.
  • the invention therefore proposes to block up the charging circuit of the condenser during the discharge thereof. Preferably this is performed with the aid of an electron tube that serves to charge the condenser and is controlled by the discharge current thereof.
  • the condenser is designated C in Fig. 2.
  • the electron tube R for instance a Thyratrcn, is the tube of the relaxation circuit. .
  • the voltage for charging the condenser C is supplied at terminals KI, K2. the relaxationoscillations is not of interest here.
  • the customary circuit arrangement may serve this purpose.
  • a charging tube L is included which by preference is a The mode of taking or deriving high vacuum multiple grid valve.
  • a resistance JW and the internal resistance of the tube R constitute the ohmic resistance of the relaxation circuit, the frequency of this circuit being determined by the product of the capacitive resistances by the ohmic ones.
  • the control grid of the tube L is connected to the relaxation circuit at a point between resistance W and tube R.
  • a condenser In a generator of electric relaxation oscillations, a condenser, a circuit for charging this condenser, a circuit for discharging it, and means to block up such charging circuit during the discharge of said condenser.
  • a condenser In a generator of electric relaxation oscillations, a condenser, a circuit for charging this condenser, a circuit for discharging it. an electronic charging tube included in such charging circuit, and means to control this tube by .the discharge current of said condenser.

Description

Dec. 21,.1937. E. HACKENBERG GENERATOR OF ELECTRIC RELAXATION OSCILLATIONS Filed Jul s, 1936 eslsiarzce Fig. 2
Patented Dec. 21, 1937 UNlTED STATS GENERATOR OF ELEGTRIG RELAXATMDN OSCH'JLATIONS Application July 8,1936, Serial No.,89,649
In Germany July 11, 1935 3 Claims.
, The invention relates to devices for generating electric relaxation oscillations, that is, oscillations of the kind having a saw-tooth shaped current curve. Devices of this nature are used in television systems and are necessary also in connectionwith certain measuring equipments.
Such oscillation generators have the disadvantage that their saw-tooth curves are round at their lower angles while they should be acute or pointed there. 7,
In the. accompanying drawing:.
Fig. 1 shows a saw-tooth curve in its ideal and also in its real appearance. Fig. 2 is a wiring diagram of an embodiment of theinvention.
In Fig. 1 the ideal saw-toothcurve is designated i. The lower angles of this curve are acute while the curve really obtained is round at these angles as indicated bythe dotted curve w. As a result the return movements of the beam of electrons are retarded in such a manner that there will be no image reproduction at a certain edge of the picture. In the case of measuring equipments this drawback acts to impair the oscillographic representation. r
Careful researches have shown these roundings tobe due'to the'fact that the condenser of the oscillation generator becomes recharged by the.
current source while still becoming discharged. The invention therefore proposes to block up the charging circuit of the condenser during the discharge thereof. Preferably this is performed with the aid of an electron tube that serves to charge the condenser and is controlled by the discharge current thereof.
The condenser is designated C in Fig. 2. The electron tube R, for instance a Thyratrcn, is the tube of the relaxation circuit. .The voltage for charging the condenser C is supplied at terminals KI, K2. the relaxationoscillations is not of interest here. The customary circuit arrangement may serve this purpose. In the feed line to the relaxation .circuit, that is, the line connected to Kl, a charging tube L is included which by preference is a The mode of taking or deriving high vacuum multiple grid valve. A resistance JW and the internal resistance of the tube R constitute the ohmic resistance of the relaxation circuit, the frequency of this circuit being determined by the product of the capacitive resistances by the ohmic ones. The control grid of the tube L is connected to the relaxation circuit at a point between resistance W and tube R.
It is well known to employ charging tubes, such as L, in connection with relaxation devices. It is not known; however, to employ the charging tube for interrupting the flow of current during the discharge of the condenser. When the condenser is discharging a current flows in the direction of the arrow. As a result a drop of potential across resistance W occurs and thus a negative bias is produced that acts on tube L. The conditions are so chosen that the tube L will be blocked by this negative potential as long as a current is flowing through resistance W, that is to say, as long as condenser C is discharging. As soon as such discharging is finished, the negative potentialceases to exist, the ourrent'immediately ceasing to flow,.and the condenser is new recharged. Saw-tooth curves obtained with the aid of an arrangement of this special construction present the ideal appearance of the curve 2' in Fig. 1.
What is claimed is;
1. In a generator of electric relaxation oscillations, a condenser, a circuit for charging this condenser, a circuit for discharging it, and means to block up such charging circuit during the discharge of said condenser.
2. In a generator of electric relaxation oscillations, a condenser, a circuit for charging this condenser, a circuit for discharging it. an electronic charging tube included in such charging circuit, and means to control this tube by .the discharge current of said condenser.
3. An arrangement. according to claim 2, wherein the said charging tube is a multiple grid valve.
- EDMUND HACKENBERG.
US89649A 1935-07-11 1936-07-08 Generator of electric relaxation oscillations Expired - Lifetime US2102951A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417286A (en) * 1944-05-31 1947-03-11 Farnsworth Television & Radio Multivibrator
US2438962A (en) * 1944-08-07 1948-04-06 Colonial Radio Corp Protection of thyratron in impulse generating circuits
US2442286A (en) * 1940-09-20 1948-05-25 Vickers Electrical Co Ltd Synchronized pulse producer
US2444151A (en) * 1942-11-16 1948-06-29 Rca Corp Scanning receiver for detecting signals of unknown frequency
US2448070A (en) * 1944-08-30 1948-08-31 Philco Corp Saw-tooth generator with automatic amplitude control
US2448069A (en) * 1944-08-30 1948-08-31 Philco Corp Saw-tooth generator with automatic amplitude control
US2462897A (en) * 1944-10-03 1949-03-01 Jacob L Rector Electronic pulse shaping circuit
US2476978A (en) * 1944-02-03 1949-07-26 Int Standard Electric Corp Time base circuit for cathode-ray tubes
US2483691A (en) * 1940-01-06 1949-10-04 Raytheon Mfg Co Condenser welding system
US2489312A (en) * 1944-01-04 1949-11-29 Us Sec War Oscilloscope sweep circuit
US2511595A (en) * 1945-02-27 1950-06-13 Hazeltine Research Inc High-frequency pulse generator
US2544482A (en) * 1946-05-29 1951-03-06 Thomas G Barnes Apparatus for timing the interval between impulses
US2562660A (en) * 1943-12-04 1951-07-31 Chance Britton Pulse generating circuit
US2791688A (en) * 1953-02-09 1957-05-07 Gilfillan Bros Inc Sweep generator using nonlinear sweeps
US3259891A (en) * 1964-05-01 1966-07-05 Coulter Electronics Debris alarm
US3281717A (en) * 1961-06-23 1966-10-25 Royson Engineering Company Pulse generator having repetition rate linearly responsive to trigger signal amplitude

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483691A (en) * 1940-01-06 1949-10-04 Raytheon Mfg Co Condenser welding system
US2442286A (en) * 1940-09-20 1948-05-25 Vickers Electrical Co Ltd Synchronized pulse producer
US2444151A (en) * 1942-11-16 1948-06-29 Rca Corp Scanning receiver for detecting signals of unknown frequency
US2562660A (en) * 1943-12-04 1951-07-31 Chance Britton Pulse generating circuit
US2489312A (en) * 1944-01-04 1949-11-29 Us Sec War Oscilloscope sweep circuit
US2476978A (en) * 1944-02-03 1949-07-26 Int Standard Electric Corp Time base circuit for cathode-ray tubes
US2417286A (en) * 1944-05-31 1947-03-11 Farnsworth Television & Radio Multivibrator
US2438962A (en) * 1944-08-07 1948-04-06 Colonial Radio Corp Protection of thyratron in impulse generating circuits
US2448070A (en) * 1944-08-30 1948-08-31 Philco Corp Saw-tooth generator with automatic amplitude control
US2448069A (en) * 1944-08-30 1948-08-31 Philco Corp Saw-tooth generator with automatic amplitude control
US2462897A (en) * 1944-10-03 1949-03-01 Jacob L Rector Electronic pulse shaping circuit
US2511595A (en) * 1945-02-27 1950-06-13 Hazeltine Research Inc High-frequency pulse generator
US2544482A (en) * 1946-05-29 1951-03-06 Thomas G Barnes Apparatus for timing the interval between impulses
US2791688A (en) * 1953-02-09 1957-05-07 Gilfillan Bros Inc Sweep generator using nonlinear sweeps
US3281717A (en) * 1961-06-23 1966-10-25 Royson Engineering Company Pulse generator having repetition rate linearly responsive to trigger signal amplitude
US3259891A (en) * 1964-05-01 1966-07-05 Coulter Electronics Debris alarm

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Publication number Publication date
FR807782A (en) 1937-01-21

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