GB1260967A - Improvements in or relating to triggerable pulse generators - Google Patents

Improvements in or relating to triggerable pulse generators

Info

Publication number
GB1260967A
GB1260967A GB5604169A GB5604169A GB1260967A GB 1260967 A GB1260967 A GB 1260967A GB 5604169 A GB5604169 A GB 5604169A GB 5604169 A GB5604169 A GB 5604169A GB 1260967 A GB1260967 A GB 1260967A
Authority
GB
United Kingdom
Prior art keywords
pulse
priming
shunt
current
circuits
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
GB5604169A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB5604169A priority Critical patent/GB1260967A/en
Publication of GB1260967A publication Critical patent/GB1260967A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K3/00Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/53Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
    • H03K3/57Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device

Abstract

1,260,967. Transistor pulse circuits. MARCONI CO. Ltd. 3 Sept., 1970 [15 Nov., 1969], No. 56041/69. Heading H3T. A triggerable pulse generator of the kind wherein a series sequence of electronic switches SW1 ... SWn requiring "priming" are connected via a "delay device" SR to a pulse forming network PN which is energized from a D.C. supply comprises, across each of the switches, a shunt circuit so dimensioned as to provide, for its associated switch, substantially the correct "priming" current. A load, e.g. a magnetron, is connected at U. "Priming" consists in allowing a small initial current to flow through the switches, which are thyristors, before the main current. In the prior art (Fig. 1, not shown) the delay device, which is a saturable reactor SR, alone was used, but this detracted from the energy available for the main pulse. In the invention, this energy is supplied by the shunt circuits. As shown, each such circuit comprises a capacitor C and resistors R1, which determine the amplitude of the priming current, and R3, which are selected to provide correct voltage distribution across the chain of thyristors. The first and last shunt circuits also include an inductor L preferably shunted by a resistor R2, which is selected to provide correct dynamic voltage sharing; in Fig. 3 (not shown), every shunt circuit has an L and R2. Any of the elements in the shunt circuits may be adjustable. L, C and R1 constitute damped series resonant circuits, whose time constants are chosen so that a quarter cycle of oscillation occurs in the time taken for SR to saturate. In Fig. 6 (not shown) each shunt circuit comprises a pulse forming network (PNI) consisting of an inductance with distributed capacitance in series with a resistor (R0) and shunted by a further resistor (R3). Dynamic voltage sharing is provided by the pulse forming networks and the R3S control the D.C. voltage distribution. Fig. 7 (not shown) is similar to Fig. 6 but a diode is connected across each series resistor (R0). In this case the time constant of each shunt circuit is made equal to the duration of the priming current plus the main pulse. At the end of the priming pulse the pulse forming networks (PNI) reverse polarity and assist the extraction of hole charge from the thyristors.
GB5604169A 1969-11-15 1969-11-15 Improvements in or relating to triggerable pulse generators Expired GB1260967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5604169A GB1260967A (en) 1969-11-15 1969-11-15 Improvements in or relating to triggerable pulse generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5604169A GB1260967A (en) 1969-11-15 1969-11-15 Improvements in or relating to triggerable pulse generators

Publications (1)

Publication Number Publication Date
GB1260967A true GB1260967A (en) 1972-01-19

Family

ID=10475578

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5604169A Expired GB1260967A (en) 1969-11-15 1969-11-15 Improvements in or relating to triggerable pulse generators

Country Status (1)

Country Link
GB (1) GB1260967A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2170245A1 (en) * 1972-02-04 1973-09-14 Rockwell International Corp
EP0004701A2 (en) * 1978-04-06 1979-10-17 Megapulse Incorporated A method of and apparatus for reducing priming and sweep-out losses in SCR switching circuits
US4251741A (en) * 1979-02-08 1981-02-17 The United States Of America As Represented By The Secretary Of The Air Force High power pulser

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2170245A1 (en) * 1972-02-04 1973-09-14 Rockwell International Corp
EP0004701A2 (en) * 1978-04-06 1979-10-17 Megapulse Incorporated A method of and apparatus for reducing priming and sweep-out losses in SCR switching circuits
EP0004701A3 (en) * 1978-04-06 1979-10-31 Megapulse, Incorporated A method of and apparatus for reducing priming and sweep-out losses in scr switching circuits
US4251741A (en) * 1979-02-08 1981-02-17 The United States Of America As Represented By The Secretary Of The Air Force High power pulser

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