Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1988-10-28
1989-08-22
Wong, Peter S.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323288, 323289, 307270, G05F 1565
Patent
active
048599271
ABSTRACT:
A highly efficient switching regulator for a field effect transistor employed in a regulated power supply as the switching element for an unregulated power source. The emitters of a pair of complementary control transistors are coupled to the gate of the field effect transistor, while the bases of each of the control transistors are coupled to a driver circuit. The driver circuit includes a switch operated by a control unit that senses the level of the output voltage of the regulated power supply and constant current circuit. The control transistors are connected for Class C operation, so that only one control transistor is conductive at any time. A charging capacitor charged from the unregulated voltage source is coupled to the gate of the field effect transistor when one of the control transistors is conductive, causing the field effect transmission to be conductive. The field effect transistor is turned off by the other control transistor becoming conductive thereby shorting the gate of field effect transistor to the unregulated voltage supply.
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Fisher Scientific Company
Wong Peter S.
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