GB1206132A - A circuit arrangement for reducing power dissipation or stressing - Google Patents

A circuit arrangement for reducing power dissipation or stressing

Info

Publication number
GB1206132A
GB1206132A GB4049967A GB4049967A GB1206132A GB 1206132 A GB1206132 A GB 1206132A GB 4049967 A GB4049967 A GB 4049967A GB 4049967 A GB4049967 A GB 4049967A GB 1206132 A GB1206132 A GB 1206132A
Authority
GB
United Kingdom
Prior art keywords
transistor
diode
circuits
voltage
resistor
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
GB4049967A
Inventor
Lajos Teby
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.)
Ganz Villamossagi Muevek
Original Assignee
Ganz Villamossagi Muevek
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 Ganz Villamossagi Muevek filed Critical Ganz Villamossagi Muevek
Priority to GB4049967A priority Critical patent/GB1206132A/en
Publication of GB1206132A publication Critical patent/GB1206132A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
    • H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
    • H03K17/08146—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in bipolar transistor switches

Abstract

1,206,132. Arc preventing. GANZ VILLAMOSSAGI MUVEK. 5 Sept., 1967, No. 40499/67. Heading H1N. [Also in Divisions H2 and H3] The dissipation or voltage across a mechanical or electronic switch is reduced during turn off by a plurality of circuits each comprising a capacitor shunted by a diode in series with a resistor or during turn on by circuits comprising an inductor shunted by a diode and resistor, or one of each circuits is provided. The figure shows an inductive load Z periodically connected to a D.C. supply Ub, Zb by a transistor, current being maintained in the load during the off periods by a free-wheeling diode connected across Z. A capacitor is connected in series with a diode across the transistor (or across the load, Fig. 8, not shown) to slow the intial rate of rise of voltage across the transistor when it is being switched off, so as to reduce the collector dissipation. During switching on the diode is reversely biased so that the capacitor discharges more slowly through the resistor and mainly when the collector voltage is low. A plurality of such circuits having different time constants may be used (Figs. 11-13, not shown). The circuits also reduce the rise of transistor voltage during switching caused by ringing of the supply inductance. Reduction of dissipation during switching on may be effected by additional inductance Z 2 or Z 2 <SP>1</SP> in series with the supply. This causes ringing, during switching on, in a sense to rapidly reduce the voltage across the transistor. Ringing during switching off is prevented by a shunt dumping resistor R 2 or R 2 <SP>1</SP> connected in series with a diode. The transistor could be replaced by a corresponding electron tube or by a controlled rectifier. The invention may also be used for a mechanically or magnetically operated relay, for vibrating contacts or for a mercury jet interrupter.
GB4049967A 1967-09-05 1967-09-05 A circuit arrangement for reducing power dissipation or stressing Expired GB1206132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4049967A GB1206132A (en) 1967-09-05 1967-09-05 A circuit arrangement for reducing power dissipation or stressing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4049967A GB1206132A (en) 1967-09-05 1967-09-05 A circuit arrangement for reducing power dissipation or stressing

Publications (1)

Publication Number Publication Date
GB1206132A true GB1206132A (en) 1970-09-23

Family

ID=10415214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4049967A Expired GB1206132A (en) 1967-09-05 1967-09-05 A circuit arrangement for reducing power dissipation or stressing

Country Status (1)

Country Link
GB (1) GB1206132A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131636A (en) * 1982-10-20 1984-06-20 Technical Components Pty Ltd Gas flow control circuits
GB2163022A (en) * 1984-08-10 1986-02-12 Danfoss As Electronic switching apparatus
CN113541653A (en) * 2021-07-27 2021-10-22 温州大学 Nanosecond steep edge pulse signal generator based on transmission line reflection principle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131636A (en) * 1982-10-20 1984-06-20 Technical Components Pty Ltd Gas flow control circuits
GB2163022A (en) * 1984-08-10 1986-02-12 Danfoss As Electronic switching apparatus
CN113541653A (en) * 2021-07-27 2021-10-22 温州大学 Nanosecond steep edge pulse signal generator based on transmission line reflection principle

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Legal Events

Date Code Title Description
PS Patent sealed