Power-generation detection circuit for use in an electronic device and power-generation detection method and power consumption control method for use in connection therewith
A power-generation detection circuit for detecting a power-generation state by an AC voltage supplied from a power-generation device including a capacitor, and switching element, a resistor, and an inverter circuit which controls the charging of the capacitor by a power-generation device. The switching element is switched by the AC voltage from the power-generation device. The voltage of the capacitor is detected by the inverter circuit thereby performing power-generation detection.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a Continuation-In-Part of application Ser. No. 09/694,223, filed Oct. 23, 2000, now pending, which is a Continuation of application Ser. No. 09/097,953, filed Jun. 16, 1998, now issued as U.S. Pat. No. 6,140,863.
Priority Data
Jun 17, 1997 [JP] 9-160147 Mar 10, 1998 [JP] 10-58694
A first voltage detector detects whether the voltage of a secondary cell has reached to 1.2V and a first timer counts a time duration for which the voltage is equal to or above 1.2V. If the time counted by the first timer reaches one hour, a second timer starts counting time for one hour. An amount of charge accumulated in the secondary cell is displays after counting of the one hour by the second timer is over. As a result, an accurate display of the amount of charge accumulated in the secondary cell can be achieved.
A rectifier circuit includes a first MOS transistor, a first capacitor configured to connect between a gate and a source of the first MOS transistor, and a switching circuit configured to supply a bias voltage to the first capacitor in response to a control signal. The high gain rectifier circuit also includes a second MOS transistor configured to imitate the first MOS transistor, a second capacitor configured to imitate the first capacitor, a dummy switching circuit configured to supply the bias voltage to the second capacitor in response to the control signal, and a generating circuit configured to generate the control signal based on a potential of the second capacitor.
