GB838058A - Improvements in electrical modulation circuits - Google Patents

Improvements in electrical modulation circuits

Info

Publication number
GB838058A
GB838058A GB3358355A GB3358355A GB838058A GB 838058 A GB838058 A GB 838058A GB 3358355 A GB3358355 A GB 3358355A GB 3358355 A GB3358355 A GB 3358355A GB 838058 A GB838058 A GB 838058A
Authority
GB
United Kingdom
Prior art keywords
output
stabilized
pulse
multivibrator
voltage
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
GB3358355A
Inventor
Norman Elson
Roderick Henry Sear
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.)
RACAL ENGINEERING Ltd
Original Assignee
RACAL ENGINEERING Ltd
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 RACAL ENGINEERING Ltd filed Critical RACAL ENGINEERING Ltd
Priority to GB3358355A priority Critical patent/GB838058A/en
Publication of GB838058A publication Critical patent/GB838058A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/52—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using discharge tubes in series with the load as final control devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/78—Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

838,058. Automatic voltage control systems. RACAL ENGINEERING Ltd. Nov. 23, 1956 [Nov. 23, 1955], No. 33583/55. Class 38 (4). [Also in Group XL (c)] A stabilized D.C. power supply is modulated by a switch having a pulse output which is connected via a discriminator circuit to a control electrode of the amplifier valve of the stabilized supply so that only positive-going pulses are applied to drive the electrode positive so that the output of the stabilized supply drops below its stabilized level during the incidence of the applied pulse. Fig. 1 shows a circuit for pulse modulating a conventional D.C. supply comprising tubes VI, V2 and gas tube T so that a stabilized D.C. output voltage is obtained the level of which can be adjusted by potentiometer R1. Modulation is effected by the pulse output from the conventional multivibrator which is applied to a diode discriminator circuit D1, D2 so that when a positive pulse is applied from the multivibrator diode D1 conducts until grid current flows in tube VI. Its anode voltage is thus reduced so that the output voltage from the stabilizer drops correspondingly. When the voltage from the multivibrator goes negative diode D1 is cut off and the output voltage is held at its normal stabilized level. The circuit may be used for pulse modulating the anode of a conventional oscillator the output from the multivibrator being applied to a control electrode of one of the oscillator valves to switch it alternately to its conducting and non- conducting state the required output level being determined by the setting of the potentiometer R1.
GB3358355A 1955-11-23 1955-11-23 Improvements in electrical modulation circuits Expired GB838058A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3358355A GB838058A (en) 1955-11-23 1955-11-23 Improvements in electrical modulation circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3358355A GB838058A (en) 1955-11-23 1955-11-23 Improvements in electrical modulation circuits

Publications (1)

Publication Number Publication Date
GB838058A true GB838058A (en) 1960-06-22

Family

ID=10354803

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3358355A Expired GB838058A (en) 1955-11-23 1955-11-23 Improvements in electrical modulation circuits

Country Status (1)

Country Link
GB (1) GB838058A (en)

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