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GB1470065A - Electrical pulse generators - Google Patents

Electrical pulse generators

Info

Publication number
GB1470065A
GB1470065A GB3949874A GB3949874A GB1470065A GB 1470065 A GB1470065 A GB 1470065A GB 3949874 A GB3949874 A GB 3949874A GB 3949874 A GB3949874 A GB 3949874A GB 1470065 A GB1470065 A GB 1470065A
Authority
GB
United Kingdom
Prior art keywords
network
switching
pulses
transistors
low impedance
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
GB3949874A
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.)
HADLAND Ltd J
Original Assignee
HADLAND Ltd J
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 HADLAND Ltd J filed Critical HADLAND Ltd J
Priority to GB3949874A priority Critical patent/GB1470065A/en
Publication of GB1470065A publication Critical patent/GB1470065A/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
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/30—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using a transformer for feedback, e.g. blocking oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/10—Modifications for increasing the maximum permissible switched voltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/661—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals
    • H03K17/662—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals each output circuit comprising more than one controlled bipolar transistor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

1470065 Pulse switching circuit JOHN HADLAND (PHOTOGRAPHIC INSTRUMENTATION) Ltd 6 Oct 1975 [10 Sept 1974] 39498/74 Heading H3T In a pulse switching circuit, e.g. to feed pulses to a capacitive load, first network of active devices such as transistors Q1-3 can be switched from a high to a low impedance state by signals from secondary windings 11-13 of transformer Ti, while a second network Q4-6 receives oppositely sensed pulses from windings 14-16, inhibiting their base currents and switching in the reverse direction if in the low impedance condition at that instant. According to which network is conducting, the output A is effectively connected to supply terminals 4 or 5. The switching is initiated by pulses from one or other of sources 17, 18, each feeding half of the primary winding 6. The switching state may be maintained during change of load current by tertiary winding 10, connected across variable resistor 9 by which the positive feedback may be adjusted to be greater than units round the loop. Zener diodes D1-12 protect the transistors and assist voltage sharing. Parallel or series parallel networks are also envisaged.
GB3949874A 1975-10-06 1975-10-06 Electrical pulse generators Expired GB1470065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3949874A GB1470065A (en) 1975-10-06 1975-10-06 Electrical pulse generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3949874A GB1470065A (en) 1975-10-06 1975-10-06 Electrical pulse generators

Publications (1)

Publication Number Publication Date
GB1470065A true GB1470065A (en) 1977-04-14

Family

ID=10409872

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3949874A Expired GB1470065A (en) 1975-10-06 1975-10-06 Electrical pulse generators

Country Status (1)

Country Link
GB (1) GB1470065A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242587A (en) * 1990-02-01 1991-10-02 Mole Valley Systems Ltd Switching circuits

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242587A (en) * 1990-02-01 1991-10-02 Mole Valley Systems Ltd Switching circuits
GB2242587B (en) * 1990-02-01 1994-05-25 Mole Valley Systems Ltd Power control circuit for reactive loads

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee