Zero current detection device
AssigneeKorea Advanced Institute of Science and Technology
InventorsChul KIM, Yechan PARK, Jaeouk CHO, Hongkyun KIM, Seong Jae MOON
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Abstract
A zero current detection device is proposed. The device may include a scaling circuit unit configured to generate a first voltage which is scaled from a target voltage. The device may also include a mirroring circuit unit configured to generate a mirroring current when the first voltage is higher than or equal to a reference voltage. The device may further include a comparator circuit unit configured to compare the target voltage and a ground voltage when the mirroring current is input.
Claims12
A zero current detection device comprising:
- a scaling circuit configured to generate a first voltage which is scaled from a target voltage;
- a mirroring circuit configured to generate a mirroring current when the first voltage is higher than or equal to a reference voltage;
- and
- a comparator circuit configured to compare the target voltage and a ground voltage when the mirroring current is input.
A zero current detection device comprising:
- a comparison signal generation circuit including:
- a first capacitor having a first terminal connected to a reference voltage,
- a first switch connected in parallel with the first capacitor,
- a second switch having one terminal connected to a second terminal of the first capacitor,
- a D flip-flop configured to delay a clock signal to output a control signal controlling operations of the first switch and the second switch, and
- an inverter configured to invert a voltage applied to the second terminal of the first capacitor and output the voltage;
- and
- a comparator circuit configured to compare a target voltage and a ground voltage based on an output of the comparison signal generation circuit.
Dependencies are inferred from the claim text.