50results about How to "Extended working voltage range" patented technology

A memory circuit includes a voltage boosting circuit for generating a voltage that exceeds a voltage supply of the voltage boosting circuit. The voltage boosting circuit includes a first transistor having a first polarity type and a second transistor having a second polarity type opposite the first transistor. The first transistor is a planar transistor, a source of the first transistor being connected with the voltage supply, and a gate of the first transistor receiving a control signal. The second transistor includes a gate formed in at least two planes. A source of the second transistor is connected with the voltage supply, a gate of the second transistor receives the control signal, and a drain of the second transistor is connected with a drain of the first transistor and forms an output of the voltage boosting circuit for generating a boosted supply voltage as a function of the control signal.

A liquid crystal (LC) pixel circuit of a LC display panel includes a first, a second, a third and a fourth switches, a LC capacitor and a storage capacitor. A first and a control terminals of the first switch respectively receive a common voltage and a first gate signal. A first and a control terminals of the second switch respectively receive a data voltage and a second gate signal. The storage capacitor and the LC capacitor electrically connect between second terminals of the first and second switches. A first and a control terminals of the third switch respectively receive the common voltage and a third gate signal. A first and a control terminals of the fourth switch respectively receive a set voltage and a fourth gate signal. Second terminals of the third and the fourth switches respectively connect to the second terminals of the second and the first switches.

The invention provides a high-end over-current protection circuit which comprises a power switch tube, a detection resistor, a detection unit and a first control unit. When the detection unit detects that current on a resistor with a known resistance value exceeds a preset threshold value, a level signal is sent to the first control unit; and the first control unit receives the signal and controls a power switch to be switched off. According to the high-end over-current protection circuit, dedicated driver chips are not required, driving can be achieved only by using convention devices, and low costs are achieved; voltage difference required by the detection unit during working is basically fixed so that a current threshold value is adjusted by adjusting a resistance value of the detection resistor during over-current protection; and connection pressure drop of the power switch tube is extremely small so that when input voltage is low, the power switch tube can still be connected to enable the whole circuit to normally work, and large work voltage ranges are achieved.

The invention discloses a current sampling circuit of a metal oxide semiconductor field effect transistor (MOSFET) switch element. A first end of the switch element is connected with a first input end of a sampling module and serves as a current input signal end, a second end of the switch element is connected with a second input end of the sampling module and serves as a current output signal end of the MOSFET switch element, and an output end of the sampling module serves as a sampling current output signal end. The sampling module directly samples voltage difference of the first end and the second end of the MOSFET switch element. Maximum voltage difference value allowed between the first input end and the second input end of the sampling module is a withstand voltage value between two input ends of the sampling module. A clamping module included in the sampling module increases the withstand voltage value of the sampling module so that a current path formed between the first input end and the second input end of the sampling module is blocked, and working voltage range of the current sampling circuit of the MOSFET switch element is improved.

The invention relates to a method for reducing leakage current of a lithium ion capacitor. The method comprises the steps of chagrining the lithium ion capacitor to voltage Ucharge by using constant current, applying constant voltage Ucharge to the positive electrode and the negative electrode of the lithium ion capacitor, and retaining for the constant voltage Ucharge for 5-180 minutes, wherein the relation of the applied constant voltage Ucharge and the rated voltage UR of the lithium ion capacitor satisfies that UR + 0.1 V <= Ucharge <= UR + 0.2 V. The leakage current of a lithium ion capacitor can be remarkably reduced.

The invention discloses an electrode preparation method and a battery. The battery anode is prepared by pasting an electrode film prepared from an active substrate, a conductive agent and a binder toa current collector, the surface density of a pole piece is improved, the electrode capacity and the pole piece stability are improved, and the internal resistance is reduced. In the preparation process of the electrode film, lamellar crystals of the binder are stretched to paste the active substance and conductive agent, influence of expansion and contraction of the active substance caused by ionembedding and separating is reduced. The battery cathode is prepared by coating a slurry prepared from a pre-lithium active substance, a binder and a conductive agent on the current collector, the active substrate and conductive agent of the cathode are wetted rapidly, dispersed ultra-finely and homogeneous in a binder solution, the amount of the solvent for slurry dispersion is reduced, energy consumption for drying is reduced, the electrode process is shortened, and the load capacity of the cathode active substance is improved. The anode and cathode of the battery can be designed in an integrated way, and energy storage of the battery is improved. The electrode preparation method is simple, production and manufacture are realized by means of existing equipment, and the method is easy topopularize.