Starter circuit
A starter circuit includes a start detection circuit for detecting a change of an input signal and outputting a start digital signal, a digital OR circuit for outputting a determination digital signal based on the start digital signal, a power supply circuit being activated based on the determination digital signal, and a digital control circuit being operated based on a power from the power supply circuit. The digital control circuit inputs a retention signal to the digital OR circuit for maintaining an operation of the power supply circuit and a reset signal to the start detection circuit for resetting the start detection circuit.
1. A starter circuit comprising:
a start detection circuit for detecting a change of an input signal and outputting a start digital signal;
a digital OR circuit for outputting a determination digital signal based on the start digital signal;
a power supply circuit being activated based on the determination digital signal; and
a digital control circuit being operated based on a power from the power supply circuit;
wherein the digital control circuit inputs a retention signal to the digital OR circuit for maintaining an operation of the power supply circuit and a reset signal to the start detection circuit for resetting the start detection circuit.
2. A starter circuit according to claim 1 , wherein the start detection circuit is a delay flip flop circuit.
3. A starter circuit comprising:
a start detection circuit for detecting a change in an input signal and outputting a start digital signal;
a digital OR circuit for outputting a determination digital signal based on the start digital signal;
a specific circuit power supply circuit being activated based on the determination digital signal; and
a digital control circuit being operated based on a power from the specific circuit power supply circuit; and
an oscillator circuit being operated based on a power from the specific circuit power supply circuit; wherein the oscillator circuit provides a clock signal to the digital control circuit, and the digital control circuit inputs a retention signal to the digital OR circuit for maintaining an operation of the specific circuit power supply circuit and a reset signal to the start detection circuit for resetting the start detection circuit.
4. A starter circuit according to claim 3 , wherein the start detection circuit is a delay flip flop circuit.
5. A starter circuit according to claim 1 , wherein once the digital control circuit is activated, the digital control circuit brings the power supply circuit to operate by means of the retention signal in a first state outputted by the digital control circuit, and brings the power supply circuit to stop by means of the retention signal in a second state.
6. A starter circuit according to claim 1 , wherein once the digital control circuit is activated, the digital control circuit brings the power supply circuit to operate by means of the retention signal in a first state outputted by the digital control circuit, and brings the power supply circuit in a sleep state with low power consumption by means of the retention signal in a second state.
7. A starter circuit according to claim 3 , wherein the specific circuit power supply circuit starts providing a power to the oscillator circuit based on the determination digital signal.
8. A starter circuit according to claim 3 , wherein the oscillator circuit connected to the specific circuit power supply circuit generates the clock signal to be provided to the digital control circuit based on a power from the specific circuit power supply circuit.
9. A starter circuit according to claim 3 , wherein the digital control circuit performs a clock operation by means of the clock signal.