H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/90
H02M 7/155 (2006.01) H03K 17/687 (2006.01)
Patent
CA 1157092
ABSTRACT The invention provides a circuit with a field-effect transistor device, or devices, to be used in controlling power transfers between an alternating polarity power supply and a load, where this supply and load, in operation, would be connected on either side of the device channel or on either side of device channels connected in series. In one form, there effectively are unidirectional current conducting means electrically con- nected from either side of the field-effect transistor device-channel to the gate region of that device, selectively through either an energy storage means or directly, the selection being made by selectively operated swit- ching means. The energy storage means can be such as to obtain its energy from the alternating polarity power supply through use of at least one other undirectional current conducting means. In another form, the field- effect device, with either side of its channel connected in this manner to the alternating polarity supply and load, has its gate operated by a second field-effect transistor device. This second device is connected to a bias control means to thereby selectively control the power transfers from the alternating supply to the load. This second field-effect device has its gate controlled by the alternating polarity power supply during operation.
341145
Honeywell Inc.
Smart & Biggar
LandOfFree
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