Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1988-04-12
1990-10-09
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307253, 307255, 307315, 323289, H03K 326, H03K 1760, G05F 140
Patent
active
049623460
ABSTRACT:
A circuit for recirculating an inductive load's (L) discharge current through the driving power switching transistor (Tpw) utilizes a control transistor (Tc) of opposite polarity to that of the power transistor and capable of withstanding a minimum fraction (1/.beta.) of the discharge current. The circuit has the advantage of allowing recirculation of current with a fixed overvoltage independent of the value of the supply voltage, without requiring additional power devices. The circuit may also be provided with means (D1, D2 and DZ1) to turn-on the control transistor in the presence of concomitant supply overvoltages to protect the power device from dumping effects.
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Horowitz et al., "The Art of Electronics", Cambridge University Press 1980, p. 78.
Japanese Abstract 59-5747, vol. 8, No. 84 (E-239) 1521, Apr. 18, 1984.
Maggioni Giampietro
Marchio Fabio
Morelli Marco
Tricoli Francesco
Miller Stanley D.
Phan Trong Quang
SGS-Thomson Microelectronics S.p.A.
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