| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of the conventional overvoltage protection circuit including three DC current branch parts of a voltage reference unit branch part, a detection resistor string branch part and a comparator branch part in which: power consumption of the three DC current branch parts is considerably high and thereby performance of the circuit is inefficient.SOLUTION: The detection circuit includes a detection unit, a signal reference source and a detection unit. The detection unit detects an input signal showing the state of a battery to supply a detection signal. The signal reference source includes a reference node, fixes a signal reference in the reference node, receives the detection signal in the same reference node and is biased by the detection signal to generate a trigger signal showing a difference between the detection signal and the signal reference. The detection unit is coupled with the signal reference source to generate an output signal showing the existence of an abnormal state in the battery according to the trigger signal. |
