Electricity: power supply or regulation systems – External or operator controlled – Using a three or more terminal semiconductive device as the...
Patent
1985-01-22
1986-07-08
Wong, Peter S.
Electricity: power supply or regulation systems
External or operator controlled
Using a three or more terminal semiconductive device as the...
307571, H03K 17687
Patent
active
045995559
ABSTRACT:
A solid state DC power control system having a single N-type or N-channel or majority carrier solid state switching element (Q1) connected to the high side (L) of the power supply for energizing a ground or neutral (V.sub.o) connected load (LD). A voltage level translation circuit (2,2') supplies a floating regulated control voltage to the switching element (Q1) high enough to maintain it turned on even if the voltage at the low side of the switching element (Q1) rises up to or near the supply voltage thereby allowing use of such N-type switching device (Q1) in the high side (L) of the supply. A zener diode (ZD3) limits the gate(G)-to-source(S) voltage to the proper level. A non-inverting drive circuit (10,12) controlled by a logic level signal input element (Q2) controls connection of the high voltage to the switching (Q1) gate (G). A first version uses a DC-DC converter (CON) and a preferred version uses a voltage multiplier (VM) in the voltage level translation, high voltage, gate supply circuit (2,2').
REFERENCES:
patent: 4420700 (1983-12-01), Fay et al.
patent: 4445055 (1984-04-01), Bete
patent: 4471245 (1984-09-01), Janutka
International Rectifier Hexfet Databook, 1982-83, First Printing pp. A-1, A-46, A-47, A-60, A-61.
Damiano Michael A.
Kramer Dennis M.
Schmerda Richard F.
Autio W. A.
Eaton Corporation
Grace C. H.
Wong Peter S.
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