US 2020/0003806 A1Published application

Detection circuit and switch module using the same

AssigneeAnpec Electronics Corporation

InventorsTSUNG-YU WU, YU-YU CHEN

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Abstract

A detection circuit and a switch module using the same is provided. The detection circuit includes a comparison circuit. A first input end of the comparison circuit is coupled to an output end of a power supply, and a second input end of the comparison circuit is coupled to an input end of a switch circuit. The comparison circuit compares voltage information or current information obtained via its first input end and it second input end, and accordingly generates an output signal. The output signal indicates whether there is an external resistor between the power supply and the switch circuit. According to the output signal, the switch circuit determines how a current provided by the power supply is to be detected, and accordingly continues or stops providing the current to a load.

Claims20

Dependent claims

A detection circuit, comprising:

a comparison circuit having a first input end for being coupled to an output end of a power supply, a second input end for being coupled to an input end of a switch circuit, and an output end,
and configured to compare a voltage of the output end of the power supply with a voltage of the input end of the switch circuit and generate an output signal accordingly;
wherein if a voltage difference between the voltage of the output end of the power supply and the voltage of the input end of the switch circuit is greater than or equal to a predetermined voltage difference, then the output signal indicates that there is an external resistor configured between the power supply and the switch circuit, and if the voltage difference between the voltage of the output end of the power supply and the voltage of the input end of the switch circuit is smaller than the predetermined voltage difference, then the output signal indicates that there is no said external resistor configured between the power supply and the switch circuit.

A detection circuit, comprising:

a comparison circuit having a first input end for being coupled to an output end of a power supply, a second input end for being coupled to an input end of a switch circuit, and an output end,
and configured to compare a current of the first input end with a current of the second input end flowing into the comparison circuit and generate an output signal accordingly;
wherein if a current difference between the current of the first input end and the current of the second input end flowing into the comparison circuit is greater than or equal to a predetermined current difference, then the output signal indicates that there is an external resistor configured between the power supply and the switch circuit, and if the current difference between the current of the first input end and the current of the second input end flowing into the comparison circuit is smaller than the predetermined current difference, then the output signal indicates that there is no said external resistor configured between the power supply and the switch circuit.

Dependencies are inferred from the claim text.

Facts

Application: 16/154,295Filed 8 Oct 2018
Priority: TW 1071227912 Jul 2018
Published: 2 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G01R 19/16528
Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values: using…
H02H 3/087
Responsive to excess current: for DC applications
H03K 5/24
Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal…
G01R 19/16538
Characterised by the application: in AC or DC supplies