Cyclical supply method and device, and detection device comprising same

Method for determining an electronic circuit operating in a cycle comprising a first operational phase requiring a higher consumption of power than a second operational phase, the method comprising the steps of:

• providing a power source supplying a first electrical voltage sufficient for all components of the electronic circuit;
• determining the components utilizing a second electrical voltage less than the first electrical voltage during the first operational phase;
• providing a voltage regulator supplying an operating voltage for the components requiring the second electrical voltage;
• powering with the power source, independent of the regulator, the components requiring a voltage greater than the second electrical voltage;
• placing a switch, upstream of the voltage regulator, which is closed during at least a portion of the first operational phase and open during at least a portion of the second operational phase;
• placing a capacitor, between the voltage regulator and the components powered by the regulator, the capacitor being charged by the voltage regulator when the switch is closed and the capacitor supplying power to at least a portion of the components powered by the voltage regulator;
• and
• selecting a cyclic ratio of the first operational phase so that a total consumption of power is less than a total consumption of power when the regulator is permanently powered by the power source, with the same cyclic ratio.

Power supply device for powering a cyclically operating electronic circuit, comprising:

• an electrical power reserve comprising a battery or an electrical accumulator, to power an entire electronic circuit;
• a voltage regulator configured to regulate a voltage supplied by the electrical power reserve to power a portion of the electronic circuit;
• at least one component of the circuit being powered by the electrical power reserve independent of the voltage regulator;
• at least one capacitor charged by the voltage regulator and configured to power at least one component of the portion of the electronic circuit powered by the regulator;
• a switch configured to deactivate the voltage regulator, such that each component of the electronic circuit powered by the capacitor is only supplied with electricity from the capacitor;
• and
• at least one of the following:
• a comparator to compare a length of time elapsed since deactivation of the regulator with a predefined time value;
• and a controller to control activation of the regulator and configured to activate the regulator when the elapsed time is greater than the predefined time value;
• or
• a comparator to compare a voltage at terminals of the capacitor with a predefined voltage value and a controller to control the switch, configured to activate the regulator when the voltage at the capacitor's terminals is below the predefined value.