Patent ID: 7173836

Claim:
A circuit making use of a push/pull-type control chip to drive a half bridge-type inverter circuit, said circuit being connected at a primary side of a transformer for converting a DC power source into an AC power source, said circuit comprising: a push/pull-type control chip having two output terminals; a drive circuit having two input terminals and two output terminals, said two input terminals being connected with said two output terminals of said push/pull-type control chip and controlled by said push/pull-type control chip; and a half bridge-type switch assembly composed of two electronic switches each having a control terminal, said control terminals being connected to two output terminals of said drive circuit and driven by said drive circuit to convert said DC power source into said AC power source sent to the primary side of said transformer, said drive circuit including: a first acceleration diode, wherein a negative terminal thereof is connected to one of said output terminals of said push/pull-type control chip and a positive terminal thereof is connected to a base of a transistor switch, an emitter of said transistor switch being connected to a reference terminal, and a collector of said transistor switch being connected to said control terminal of one of said electronic switch and to said DC power source via a first resistor; a second resistor in shunt with said first acceleration diode; a second acceleration diode, wherein a negative terminal thereof is connected to another one of said output terminals of said push/pull-type control chip and a positive terminal thereof is connected to said control terminal of another one of said electronic switches via a coupling capacitor; and a third resistor in shunt with the second acceleration diode.