Patent ID: 7541847
Filing Date: 2009-06-02
Classification: H03K

Abstract:
1. A power-diode driver having expansible isolated sub-drivers using a single power source, comprising an input, a trigger pulse transformer and an output, wherein a terminal of said input is grounded; wherein another terminal of said input is connected with a first diode and a first resistance, said first diode and said first resistance having a parallel connection; said first diode and said first resistance being connected with a base of a first NPN transistor; a collector of said first NPN transistor being connected with a second resistance and a first inverting Schmitt trigger; an emitter of said first NPN transistor being connected with a first capacitance and a third resistance; said first capacitance and said third resistance having a parallel connection; said first capacitance and said third resistance being grounded; said first inverting Schmitt trigger being connected with a fourth resistance; said fourth resistance being connected with a second diode; said second diode being connected with a second inverting Schmitt trigger; a fifth resistance; and a second capacitance; a terminal of said second capacitance being grounded; said second inverting Schmitt trigger and said fifth resistance being connected with a third inverting Schmitt trigger; said third inverting Schmitt trigger being connected with a third diode and a sixth resistance; said third diode and said sixth resistance having a parallel connection; said third diode and said sixth resistance being connected with a base of a second NPN transistor; an emitter of said second NPN transistor being connected with an eighth resistance and a third capacitance; said eighth resistance and said third capacitance being grounded; a collector of said second NPN transistor being connected with said trigger pulse transformer; wherein a primary side coil of said trigger pulse transformer is connected with a fourth diode and a seventh resistance; wherein a secondary side coil of said trigger pulse transformer is connected with a sixth diode and a fifth diode, said sixth diode and said fifth diode being connected with a ninth resistance; a fourth capacitance; an emitter of a third PNP transistor; a base of a fourth PNP transistor; and a seventh diode; a terminal of said ninth resistance being grounded; said fourth capacitance being connected with said emitter of said third PNP transistor; said base of said fourth PNP transistor; and said seventh diode; a terminal of said fourth capacitance being grounded; said emitter of said third PNP transistor being connected with said base of said fourth PNP transistor; and said seventh diode; a collector of said third PNP transistor being connected with a tenth resistance; a base of said third PNP transistor being connected with a collector of said fourth PNP transistor; said tenth resistance; an eleventh resistance; a twelfth resistance; and a base of a fifth NPN transistor; said seventh diode being connected with an emitter of said fourth PNP transistor; a collector of said fifth NPN transistor; an eighth diode; a fifth capacitance; a sixth capacitance; and a Zener diode; said fifth capacitance, said sixth capacitance and said Zener diode having a parallel connection; said base of said fourth PNP transistor being connected with said seventh diode; said emitter of said fourth PNP transistor being connected with said collector of said fifth NPN transistor; said eighth diode; said fifth capacitance; said sixth capacitance; and said Zener diode; said collector of said fourth PNP transistor being connected with said tenth resistance; said eleventh resistance; said twelfth resistance; and said base of said fifth NPN transistor; said tenth resistance being connected with said eleventh resistance, said twelfth resistance and said base of said fifth NPN transistor; a terminal of said eleventh resistance being grounded; said eleventh resistance being connected with said base of said fifth NPN transistor; and said twelfth resistance; said twelfth resistance being connected with a base of a sixth NPN transistor; and a thirteenth resistance; a terminal of said thirteenth resistance being grounded; said collector of said fifth NPN transistor being connected with said eighth diode; said fifth capacitance; said sixth capacitance; and said Zener diode; an emitter of said fifth NPN transistor being connected with said eighth diode; a ninth diode; and a collector of said sixth NPN transistor; said base of said sixth NPN transistor being connected with said thirteenth resistance; said collector of said sixth NPN transistor being connected with said eighth diode and said ninth diode; an emitter of said sixth NPN transistor being grounded; said eighth diode being connected with said fifth capacitance; said sixth capacitance; said Zener diode; and said ninth diode; said fifth capacitance, said sixth capacitance and said Zener diode being grounded; wherein a terminal of said output is connected with said eighth diode; said ninth diode; said collector of said sixth NPN transistor; and said emitter of said fifth NPN transistor; wherein another terminal of said output is grounded; and wherein said input receives a signal and a counter-electromotive force is absorbed by said primary side coil of said trigger pulse transformer to provide a voltage to pass said signal to said secondary side coil of said trigger pulse transformer.