Multi-path current difference detection device

1 . A multi-path current difference detection device disposed on a circuit board, and the circuit board comprising a plurality of layer boards with a laminated structure, the multi-path current difference detection device comprising:

an induction component configured to induce a plurality of currents flowing through a plurality of paths, and calculate a net current value of a plurality of current values of the plurality of currents, wherein the plurality of paths are respectively disposed on different layer boards, and

a determination unit configured to receive a current signal corresponding to the net current value, and provide a detection signal when determining that the current signal is greater than or equal to a current threshold.

2 . The multi-path current difference detection device as claimed in claim 1 , wherein the determination unit comprises:

a signal amplifier configured to receive the current signal and amplify the current signal, and

a voltage follower connected to the signal amplifier and receive the current signal amplified by the signal amplifier,

wherein based on the current signal amplified by the signal amplifier being greater than or equal to the current threshold, the voltage follower is configured to provide the detection signal with a high level,

wherein based on the current signal amplified by the signal amplifier being less than the current threshold, the voltage follower is configured to provide the detection signal with a low level.

3 . The multi-path current difference detection device as claimed in claim 1 , wherein the multi-path current difference detection device is an integrated circuit.

4 . The multi-path current difference detection device as claimed in claim 1 , wherein a current value corresponding to the current threshold is zero amp.

5 . The multi-path current difference detection device as claimed in claim 1 , wherein each current is an alternating-current current, and a current value corresponding to the current threshold is 15 milliamps.

6 . The multi-path current difference detection device as claimed in claim 1 , wherein each current is an alternating-current current or a direct-current current, and a current value corresponding to the current threshold is direct-current 3 to 6 milliamps.

7 . The multi-path current difference detection device as claimed in claim 1 , wherein the induction component is a Hall component, a tunneling magnetoresistance, an anisotropic magnetoresistance, a giant magnetoresistance, a colossal magnetoresistance, an ordinary magnetoresistance, or a shunt resistor.

8 . The multi-path current difference detection device as claimed in claim 2 , wherein the signal amplifier is an operational amplifier.

9 . A multi-path current difference detection device disposed on a circuit board, and the circuit board comprising a plurality of layer boards with a laminated structure, the multi-path current difference detection device comprising:

a sensing component configured to receive a plurality of currents flowing through a plurality of paths, wherein the plurality of paths are respectively disposed on different layer boards, and

a determination unit configured to receive a plurality of current signals corresponding to a plurality of current values of the plurality of currents, calculate a net current value of the plurality of current values, and provide a detection signal when determining that a net current signal corresponding to the net current value is greater than or equal to a current threshold.

10 . The multi-path current difference detection device as claimed in claim 9 , wherein the determination unit comprises:

a plurality of signal amplifiers configured to respectively receive the plurality of current signals and respectively amplify the plurality of current signals, and

a plurality of voltage followers correspondingly connected to the plurality of signal amplifiers and respectively receive the plurality of current signals amplified by the plurality of signal amplifiers, and

a computation circuit connected to the plurality of voltage followers, the computation circuit comprising a summing circuit and a comparator, and the computation circuit configured to respectively receive the plurality of current signals amplified by the plurality of signal amplifiers, and use the summing circuit to sum the plurality of current signals to generate the net current signal corresponding to the net current value,

wherein based on the net current signal being greater than or equal to the current threshold, the comparator of the computation circuit is configured to provide the detection signal with a high level,

wherein based on the net current signal being less than the current threshold, the comparator of the computation circuit is configured to provide the detection signal with a low level.

11 . The multi-path current difference detection device as claimed in claim 9 , wherein the multi-path current difference detection device is an integrated circuit.

12 . The multi-path current difference detection device as claimed in claim 9 , wherein a current value corresponding to the current threshold is zero amp.

13 . The multi-path current difference detection device as claimed in claim 9 , wherein each current is an alternating-current current, and a current value corresponding to the current threshold is 15 milliamps.

14 . The multi-path current difference detection device as claimed in claim 9 , wherein each current is an alternating-current current or a direct-current current, and a current value corresponding to the current threshold is direct-current 3 to 6 milliamps.

15 . The multi-path current difference detection device as claimed in claim 9 , wherein the sensing component is a Hall component, a tunneling magnetoresistance, an anisotropic magnetoresistance, a giant magnetoresistance, a colossal magnetoresistance, an ordinary magnetoresistance, or a shunt resistor.

16 . The multi-path current difference detection device as claimed in claim 10 , wherein the signal amplifier is an operational amplifier.