| 摘要 |
<p>There are provided a current sensor which has a self-diagnosis function and a signal processing circuit. The current sensor is provided with an offset component output circuit 102 which extracts an offset component from an output signal of a Hall element 101 which includes a signal component and an offset component, a reference signal generator 103 which outputs a reference signal, and an error signal generation circuit 104 which generates an error signal based on an offset component which the offset component output circuit 102 outputs and a reference signal. The offset component output circuit 102 is provided with a signal amplification circuit 106 which amplifies the output of the Hall element 101 and outputs an output signal and offset component to a low frequency component and the other to a ripple component.</p> |
