Patent ID: 7368901

Claim:
A sequential control circuit, comprising: an input terminal; a first node; a second node; a first diode having an anode connected to the input terminal and a cathode connected to the first node; a first resistor connected between the input terminal and the first node; a first condenser coupled between the first node and a ground; a second diode having a cathode connected to the input terminal and an anode connected to the second node; a second resistor connected between a voltage source and the second node; and a second condenser connected between the second node and the ground, wherein: a speed of charging the first condenser is higher than a speed of charging the second condenser when a voltage of the input terminal is determined at a first state; and a speed of discharging the first condenser is lower than a speed of discharging the second condenser when the voltage of the input terminal is determined at a second state.