Patent ID: 8680885

Claim:
A control circuit for a logic circuit, wherein the control circuit receives a control signal at a control input terminal and provides a first voltage and a second voltage to the logic circuit, the control circuit comprising: a first transistor and a first resistor, the base terminal of the first transistor being connected to the control input terminal, the collector terminal of the first transistor is connected to a supply voltage source through the first resistor, and the emitter terminal of the first transistor is grounded; a second transistor and a second resistor, the base terminal of the second transistor being connected to the collector terminal of the first transistor, the collector terminal of the second transistor is connected to the supply voltage source through the second resistor, and the emitter terminal of the second transistor is grounded; a third transistor, the gate terminal of the third transistor being connected to the collector terminal of the second transistor, the drain terminal of the third transistor is connected to the supply voltage source, the source terminal of the third transistor supplies the first voltage to the logic circuit; and a voltage drop component, wherein an input terminal of the voltage drop component is connected to the source terminal of the third transistor, and an output terminal of the voltage drop component supplies the second voltage to the logic circuit, wherein the magnitudes of the first voltage and second voltage are such that the logic circuit conducts no current when the logic circuit operates in OFF state.