GB611731A - Improvements in or relating to control circuits for relaxation oscillators - Google Patents

Improvements in or relating to control circuits for relaxation oscillators

Info

Publication number
GB611731A
GB611731A GB30389/45A GB3038945A GB611731A GB 611731 A GB611731 A GB 611731A GB 30389/45 A GB30389/45 A GB 30389/45A GB 3038945 A GB3038945 A GB 3038945A GB 611731 A GB611731 A GB 611731A
Authority
GB
United Kingdom
Prior art keywords
valve
resistance
grid
multivibrator
valves
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
GB30389/45A
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.)
Philco Radio and Television Corp
Original Assignee
Philco Radio and Television Corp
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 Philco Radio and Television Corp filed Critical Philco Radio and Television Corp
Publication of GB611731A publication Critical patent/GB611731A/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
    • H03K3/05—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 means other than a transformer for feedback
    • H03K3/06—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 means other than a transformer for feedback using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/08—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 means other than a transformer for feedback using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Amplifiers (AREA)

Abstract

611,731. Pulse-generating circuits. PHILCO RADIO & TELEVISION CORPORATION. Nov. 13, 1945, No. 30389. Convention date, Aug. 2. 1944. [Class 40 (vi)] In order to avoid transient and other disturbances, a multivibrator oscillator circuit comprises means responsive to a control signal, for rendering the oscillator operative after a time delay. Valves T2 and T3 in Fig. 1, provide a conventional multivibrator circuit, the operation of which is controlled by valve T1. The anode supply of valve T1 is-supplied via the grid resistance 14 of valve T2 and a tapping on resistance 23; resistors 23 and 22 connect the common cathode point of valves T2 and T3 to a source of positive potential. Cathode bias for valves T2 and T3 is provided by resistance 15. Under steady conditions, valve, T1 is conducting, the anode current flowing through resistance 14 which applies a negative bias to the grid of valve T2, preventing this valve from conducting; valve T3 is conducting at this stage. If a negative timing pulse is applied at point 25 to cut-off valve T1 the negative bias is removed from valve T2 after a time delay dependent on the condenser resistance circuit 17, 14, and the multivibrator circuit then commences to oscillate, oscillations being maintained throughout the period of the timing pulse. At the end of the pulse, negative bias is again applied to the grid of valve T2, stopping the multivibrator action. Resistance 12 in the cathode lead of valve T1 is made variable to control anode current, and thus the time delay period. The tapping on resistor 23 enables the frequency of the multivibrator to be controlled. A modification provides for the grid resistors 14 and 19 to be connected to a separate supply, or for the grid of valve T1 to be connected to ground.
GB30389/45A 1944-08-02 1945-11-13 Improvements in or relating to control circuits for relaxation oscillators Expired GB611731A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US547719A US2443922A (en) 1944-08-02 1944-08-02 Control circuit for relaxation oscillators

Publications (1)

Publication Number Publication Date
GB611731A true GB611731A (en) 1948-11-03

Family

ID=24185854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30389/45A Expired GB611731A (en) 1944-08-02 1945-11-13 Improvements in or relating to control circuits for relaxation oscillators

Country Status (2)

Country Link
US (1) US2443922A (en)
GB (1) GB611731A (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567851A (en) * 1945-08-01 1951-09-11 Harry J Lipkin Pulse-blocking circuit
US2519413A (en) * 1946-07-25 1950-08-22 Albert H Taylor Oscilloscope sweep circuit
US2547523A (en) * 1947-10-30 1951-04-03 Western Electric Co Electronic pulse generator
US2512851A (en) * 1948-04-03 1950-06-27 Remington Rand Inc Pulse generator
US2562171A (en) * 1948-07-07 1951-07-31 Robert C Butman Stabilized multivibrator
US2627576A (en) * 1949-02-01 1953-02-03 Rca Corp Saw-tooth wave generator
US2593330A (en) * 1949-06-02 1952-04-15 Bell Telephone Labor Inc Variable frequency relaxation oscillator
US2562531A (en) * 1949-06-23 1951-07-31 Ibm Linear variation of phase of an oscillator
US2729766A (en) * 1951-02-07 1956-01-03 Rca Corp Electronic oscillator circuits
US2857514A (en) * 1953-10-30 1958-10-21 Rca Corp Wave generating system
US2874291A (en) * 1955-10-12 1959-02-17 Gen Electric Sweep generator circuit
US3115771A (en) * 1959-06-09 1963-12-31 Branson Instr Method and apparatus for ultrasonic shearwave inspection
US3034063A (en) * 1959-09-16 1962-05-08 Aircraft Armaments Inc Zero recovery time pulse generator using polarity sensitive integrator driving schmitt trigger through cathode follower
DE1133427B (en) * 1959-11-18 1962-07-19 Nippon Electric Co Impulse distributor storage system
US3133257A (en) * 1960-08-22 1964-05-12 Rca Corp Oscillator with triggerable phasing
US3245003A (en) * 1963-12-20 1966-04-05 Ibm Oscillator with phase synchronization
JPS5189375A (en) * 1975-02-04 1976-08-05

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037035A (en) * 1932-03-04 1936-04-14 Harry R Lubcke Television synchronization method and apparatus
US2132654A (en) * 1934-10-18 1938-10-11 Rca Corp Electrical apparatus
NL88393C (en) * 1937-06-18
US2281934A (en) * 1937-07-21 1942-05-05 Telefunken Gmbh Electrical impulse segregation circuits
BE481673A (en) * 1943-03-24
US2406096A (en) * 1943-10-23 1946-08-20 Morrison Montford Electronic regenerative repeater

Also Published As

Publication number Publication date
US2443922A (en) 1948-06-22

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