US2582697A - Blocking oscillator - Google Patents

Blocking oscillator Download PDF

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Publication number
US2582697A
US2582697A US19455A US1945548A US2582697A US 2582697 A US2582697 A US 2582697A US 19455 A US19455 A US 19455A US 1945548 A US1945548 A US 1945548A US 2582697 A US2582697 A US 2582697A
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US
United States
Prior art keywords
voltage
rectifier
condenser
tube
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 - Lifetime
Application number
US19455A
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English (en)
Inventor
Hepp Gerard
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2582697A publication Critical patent/US2582697A/en
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    • 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

Definitions

  • the value of the invariably positive current impulses cannot be adjusted to any desired value and is entirely determined by the parameters of the tube, more particularly by those points of the anode-current control-grid voltage characteristic curve of the discharge tube which are widely divergent in straight-line relationship, the term positive impulse being to be understood to mean an impulse at which an anode current passes for a comparatively short time and no anode current passes for a comparatively long time.
  • the invention has for its object-to provide a circuit-arrangement which permits of also producing negative impulses and which'in addition readily permits of adjusting the impulse to any desired value.
  • the discharge tube may in addition accomplish other functions, for example, may be used for producing a plurality of positive and/or negative impulses or for amplifying or generating electrical oscillations.
  • pulse-like currents or voltages are set up in the anode circuit of a discharge tube, a pulse-like voltage taken from the anode circuit charging, through a rectifier, a condenser which becomes discharged, in part, across a resistance and a rectifier with threshold voltage included in the grid circuit of the discharge tube, in such manner that the grid Voltage of the discharge tube varies ina pulse-like fashion if the condenser is discharged below a value corresponding to the said threshold voltage.
  • l designates a discharge tube, the anode circuit of which includes a transformer 2, the secondary winding 3 of which is connected through a rectifier 4 to a condenser 5.
  • Thi condenser 5 is connected through a resistance 6 and a second secondary winding 9 of the transformer 2 to the series combination of a rectifier and a threshold voltage source B1, which combination is included in the r d ci cu t Oi th 5 Claims. (01.250-36) dischargetube I.
  • the pulse-like oscillations may be taken, for example, from a terminal ll;
  • the secondary 3 of-the transformer 2 included in the anode circuit of the tube I will have induced init a pulse-like voltage which is rectified by a rectifier 4.
  • the condenser 5 becomes charged to a positive value; the condenser voltage is denoted by a dotted line at the bottom of Fig. 2.
  • the condenser 5 becomes discharged across-the resistance 6 and the rectifier l with threshold voltage B1- and across the leakage resistance M of the rectifier 4.
  • the grid I5 of the tube 1 will have a substantially constant potentialB1 a long as the voltage across the condenser 5 exceeds the voltage of the voltage source B3.
  • the grid voltage of the tube l (full curve at the bottom of- Fig. 2) drops, with the result that the anode current of this tube also drops (full curve on the right-hand side of Fig. 2).
  • Fig. 1 shows, for example, a circuit-arrangement in which this tube I also acts as an amplifier of oscillations rendered effective in the grid-circuit of the discharge sired value.
  • plified voltage and the produced impulses may be taken from the terminal II.
  • the terminal II In order to prevent the nonpulse-like oscillations produced across,
  • A- circuit arrangement for generating voltagepulses comprising an electron discharge tube having a cathode, a grid and an anode, an anode circuit for applying an operating potential tov said anode,- a charging condenser, first and second rectifiers, means coupled to said anode circuit to derive a voltage pulse therefrom and for applying said pulse through said first rectifier across 'said'condenser to charge same, an impedance coupled to said anode circuit to derive a positive feedback voltage'therefrom, a resistance, a source of direct voltage, means to apply said feedback voltage to said resistance in series with said second rectifier and said source in the order named, a discharge network connected across said condenser and including said resistance, said second rectifier and said source in series relation, and means to apply the voltage developed across said second rectifier between said grid and said cathode, the polarity of said source being arranged inopposition to the polarity of charge on said condenser, said source having a magnitude at which when said charge falls to a
  • a circuit arrangement for producing voltage pulses comprising an electron discharge tube having a cathode, a grid and an anode, a transformer having a primary and first and second secondaries, means to apply a constant potential to said anode through said primary, first and second rectifiers, a charging condenser, said first secondary being connected to said condenser through said first rectifier, a resistance, a source of direct voltage, said second secondary being connected in series with said resistance, said second rectifier and said source in the order named across said condenser, the polarity of said source being opposed to the polarity of the charge attained by said condenser, and means to apply the voltage developed across said second rectifier between said grid and said cathode, said source having a value at which when said condenser is discharged to a predetermined level said tube produces said pulses, said second secondary being connected to provide positive feedback.
  • a circuit arrangement for producing voltage pulses and amplifying oscillations comprising an electron discharge tube having a cathode, a grid and an anode, a transformer having a primary and first and second secondaries, means to apply a constant potential to said anode through said primary, first and second rectifiers, a charging condenser, said first secondary being connected to said condenser through said first rectifier, a resistance, a source of direct voltage, said second secondary being connected in series with said resistance and said second rectifier and said source across said condenser, the polarity of said source being opposed to the polarity of the charge attained by said condenser, said second secondary being arranged to provide positive feedback, means to apply the voltage across said second rectifier between said grid and said cathode, said source having a value at which when said. condenser is discharged to a predetermined level said tube produces said pulses, and transformer means for impressing said oscillations intermediate said grid and said junction of said resistance and said second rectifier.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Secondary Cells (AREA)
US19455A 1947-04-22 1948-04-07 Blocking oscillator Expired - Lifetime US2582697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL269956X 1947-04-22

Publications (1)

Publication Number Publication Date
US2582697A true US2582697A (en) 1952-01-15

Family

ID=19781883

Family Applications (1)

Application Number Title Priority Date Filing Date
US19455A Expired - Lifetime US2582697A (en) 1947-04-22 1948-04-07 Blocking oscillator

Country Status (7)

Country Link
US (1) US2582697A (de)
BE (1) BE481991A (de)
CH (1) CH269956A (de)
DE (1) DE901795C (de)
FR (1) FR964971A (de)
GB (1) GB661377A (de)
NL (1) NL79496C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787707A (en) * 1953-06-16 1957-04-02 Gen Electric Pulse generators
US2819395A (en) * 1954-05-24 1958-01-07 Burroughs Corp Driving circuits for static magnetic elements
US2873369A (en) * 1955-05-12 1959-02-10 Motorola Inc Television synchronization
US2922037A (en) * 1955-11-17 1960-01-19 Bell Telephone Labor Inc Quick recovery circuit for blocking oscillators
US3072802A (en) * 1959-01-14 1963-01-08 Burroughs Corp Pulse driver with magnetic amplitude and width control

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1041080B (de) * 1954-06-10 1958-10-16 Siemens Ag Frequenzstabiler Rechteckgenerator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207511A (en) * 1936-05-12 1940-07-09 Telefunken Gmbh Oscillation generator
US2250706A (en) * 1937-03-19 1941-07-29 Telefunken Gmbh Saw-tooth wave generator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207511A (en) * 1936-05-12 1940-07-09 Telefunken Gmbh Oscillation generator
US2250706A (en) * 1937-03-19 1941-07-29 Telefunken Gmbh Saw-tooth wave generator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787707A (en) * 1953-06-16 1957-04-02 Gen Electric Pulse generators
US2819395A (en) * 1954-05-24 1958-01-07 Burroughs Corp Driving circuits for static magnetic elements
US2873369A (en) * 1955-05-12 1959-02-10 Motorola Inc Television synchronization
US2922037A (en) * 1955-11-17 1960-01-19 Bell Telephone Labor Inc Quick recovery circuit for blocking oscillators
US3072802A (en) * 1959-01-14 1963-01-08 Burroughs Corp Pulse driver with magnetic amplitude and width control

Also Published As

Publication number Publication date
DE901795C (de) 1954-01-14
CH269956A (de) 1950-07-31
NL79496C (de)
FR964971A (de) 1950-08-30
GB661377A (en) 1951-11-21
BE481991A (de)

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