INFORMATION COLLECTION CIRCUIT AND INFORMATION COLLECTION MODULE

摘要

An information collection circuit includes a control circuit, which collects information of a measurement subject from a detection circuit, and a rectification circuit, which rectifies electromotive force. A first switch, coupled between the rectification circuit and the control circuit, becomes conductive based on DC voltage generated by the rectification circuit. A second switch, coupled between the control circuit and a battery, becomes conductive based on a control signal provided from the control circuit. The second switch is non-conductive when the control circuit is inactive. The control circuit is activated by a first power voltage supplied via the first switch to control the second switch to become conductive, and is operated based on a second power voltage supplied from the battery via the conductive second switch.

主权项

1. An information collection circuit that collects information of a measurement subject, the information collection circuit comprising:
a detection circuit that generates a detection signal in accordance with the information of the measurement subject; a control circuit that collects the information of the measurement subject from the detection signal of the detection circuit; a rectification circuit that rectifies electromotive force generated at a coil by an external magnetic field or an external electric field; a first semiconductor switch coupled between the rectification circuit and a power terminal of the control circuit, wherein the first semiconductor switch becomes conductive based on a DC voltage generated by the rectification circuit; and a second semiconductor switch coupled between the power terminal of the control circuit and a battery, wherein the second semiconductor switch becomes conductive based on a control signal provided from the control circuit to a control terminal of the second semiconductor switch, and the second semiconductor switch is non-conductive when the control circuit is inactive, wherein the control circuit is activated by a first power voltage supplied via the first semiconductor switch to control the second semiconductor switch to become conductive, and the control circuit is operated based on a second power voltage supplied from the battery via the second semiconductor switch, which has become conductive, to collect the information of the measurement subject.