Patent application number | Description | Published |
20090257161 | Rechargeable battery protection device - A rechargeable battery protection device has a voltage detector, a logic circuit, an output stage, a first switch, a second switch and inverter circuits. The device turns on a charger to charge a rechargeable battery or turns off the charger not to charge the rechargeable battery depending on the purpose for battery protection. | 10-15-2009 |
20090296780 | Temperature measuring system and measuring method using the same - A temperature measuring system and a measuring method using the same are disclosed. The method for measuring an integrated circuit temperature includes the steps of: detecting a first difference in output voltage values between a first transistor and a second transistor by providing a first current through the first transistor and a second current through the second transistor; detecting a second difference in output voltage values between the first transistor and the second transistor by providing the second current through the first transistor and the first current through the second transistor; obtaining an average value by averaging the first difference and the second difference; and determining the temperature by multiplying the average value with a predetermined value. | 12-03-2009 |
20100066444 | WIDE-RANGE AND HIGH-RESOLUTION PROGRAMMABLE GAIN AMPLIFIER - A first gain stage and a second gain stage having different gains are linked in cascade to construct a wide range and high resolution programmable gain amplifier. The second gain stage can be used only for low gain and low power consumption. Furthermore, two pairs of chopper circuits are used to shift flicker noise when the programmable gain amplifier is operated. | 03-18-2010 |
20120277931 | MICRO CONTROL UNIT FOR PROVIDING STABLE VOLTAGE OUTPUT TO ELECTRIC DEVICE AND SYSTEM FOR PROTECTING ELECTRIC DEVICE - The present invention is to disclose a micro control unit for an electric device. It includes a charge pump regulator, connected to an external DC power source, for boosting and regulating voltage outputted from the DC power source; and a controller, switched between the external DC power source while a current of the DC power source is stable and the charge pump regulator while the current is unstable, for outputting a stable voltage to the electric device, thereby eliminating damage to the electric device caused by input surge current. | 11-01-2012 |
20140025323 | CELL VOLTAGE MONITORING AND SELF-CALIBRATING DEVICE - A cell voltage monitoring and self-calibrating device for a plurality of battery cells connected in series is disclosed. The device includes a first voltage measurement unit, a second voltage measurement unit, a first compensation unit, a second compensation unit and a calculating unit. It can measure voltages of each cell in a battery pack which provides power to electric equipment and calibrates itself during measurement. | 01-23-2014 |
20140049275 | COMPENSATING CIRCUIT HAVING PROGRAMMABLE CAPACITANCE ARRAY FOR MEASURING AC VOLTAGE - A compensating circuit which has a programmable capacitance array for measuring AC voltage is disclosed in the present invention. The compensating circuit includes a pair of first leads for linking to an AC circuit; a variable capacitor, electrically linked to the first leads, for providing different capacitance value according to a programmable capacitance array; and a control unit, electrically linked to the first leads, for changing the capacitance value of the variable capacitor as one capacitance of the programmable capacitance array according to an external instruction. Since the capacitance of the compensating circuit is changeable, and AC voltage meter designed with the compensating circuit is able to measure voltage in wider range of frequency. | 02-20-2014 |
20140052397 | INRUSH CURRENT MEASURING DEVICE - An inrush current measuring device is disclosed in the present invention. The device includes a current sensing unit, an analog-to-digital converter, a filter, a microcontroller, and a display unit. The inrush current measuring device of the present invention can determine an inrush current by use of at least five sampling current values and does not need to depend on an observation starting point for detecting current value of the inrush current or a continuous detecting time period to obtain accurate measurement of inrush current. | 02-20-2014 |
20150222137 | CONTROL METHOD FOR ACHIEVING POWER TRANSFER BETWEEN STACKED RECHARGEABLE BATTERY CELLS AND POWER TRANSFER CIRCUIT THEREOF - A control method for achieving power transfer between stacked rechargeable battery cells and a power transfer circuit are disclosed. The power transfer circuit includes an inductor, a first switch, a second switch and a controller. A loop of the rechargeable battery cell having higher power and the inductor is conducted so that the inductor stores power until the current flowing through the inductor meets the cutoff amount. Then, a loop of the rechargeable battery cell having lower power and the inductor is conducted so that the inductor releases the power saved in the inductor to the rechargeable battery cell having lower power until current flowing through the inductor changes direction. Therefore, balance between the rechargeable battery cells can be achieved. | 08-06-2015 |