67results about How to "High voltage accuracy" patented technology

The invention discloses a reference voltage regulating circuit of an integrated circuit. A reference voltage system of the integrated circuit comprises an LDO module, a regulation module and a regulation control module. The regulation module comprises a first-stage calibration and regulation module and a second-stage calculation and regulation module. The regulation control module is connected with an off-chip program control module, a regulation control signal is generated according to a calibration signal provided by the program control module, the first-stage calibration and regulation module conducts first-stage calibration on reference voltage of the integrated circuit according to the regulation control signal, the second-stage calibration and regulation module conducts second-stage calibration on the basis of first-stage calibration according to the regulation control signal, the reference voltage is regulated to preset reference voltage, and accordingly the voltage range and precision of reference voltage regulation are effectively improved through two stages of calibration. The invention further discloses a reference voltage regulation system of the integrated circuit. The reference voltage regulating system comprises the reference voltage regulation circuit and the off-chip program control module.

The invention provides a high-precision and wide-current-range current mirror. The high-precision and wide-current-range current mirror comprises a reference current input part, a current gear judgment and control logic and an image current output part. The reference current input part and the image current output part are connected with the current gear judgment and control logic. The high-precision and wide-current-range current mirror has the advantages that the current mirror capable of working in a linear area in a current gear switching mode is adopted, a current mirror circuit is improved, the VDS voltage precision is improved, accordingly, the current mirror image precision is improved, and the current mirror image range is widened.

The invention discloses a thermal battery positive electrode material and a preparation method thereof. Tungsten (molybdenum) metal ions are used as a positive electrode material of an electron acceptor; the main components of the positive electrode material comprise tungsten (molybdenum) sulfide, an additive, an electronic conductive agent, an ion conductive agent and a binder; through steps of ahigh-temperature roasting process, a vacuum-atmosphere replacement roasting process, an additive passivation treatment process, a mechanical activation roasting process, a crushing, sieving and packaging process and the like, the contents of volatile and decomposed impurities are reduced, the stability of the positive electrode material is improved, and the battery safety is improved. The positive electrode material disclosed by the invention is good in thermal stability, high in material utilization rate, small in self-discharge, large in output capacity and long in working time, and is an ideal positive electrode material of a high-capacity long-time thermal battery.

The invention relates to a high-capacity unified power quality conditioner based on a chain structure and a control method of the high-capacity unified power quality conditioner. A three-phase three-wire system series-and-parallel structure is adopted in the high-capacity unified power quality conditioner. The high-capacity unified power quality conditioner comprises a series type voltage source converter and a parallel type voltage source converter, wherein the series type voltage source converter and the parallel type voltage source converter are connected through a common direct-current bus, single-phase H-bridge cascade structures are adopted in the series type voltage source converter, the H-bridge cascade structure of each phase is connected to an alternating-current side power grid through a series capacitor, single-phase H-bridge chain link structures are adopted in the parallel side converter, a back-to-back structure is formed by the single-phase H-bridge chain link structures and H-bridge chain links of the series type voltage source converter, and each H-bridge chain link of the parallel side converter is connected to a direct-current side power grid through the secondary side of a single-phase multi-winding transformer. The invention further provides the control method of the high-capacity unified power quality conditioner. According to the high-capacity unified power quality conditioner, a series side transformer is omitted, short-circuit impedance of a loop is reduced, voltage accuracy of open-loop control is improved, performance of the high-capacity unified power quality conditioner is improved, and the problem that the instantaneous inrush current phenomenon happens when voltage drop of the series side happens is solved.

A testing device for a semiconductor integrated circuit of the present invention includes a differential amplifier array module and tester which determine whether an output voltage of a liquid crystal driver LSI is at a proper level and an expected value voltage generator which generates an expected value voltage in accordance with expected value data to output it to the differential amplifier array module. The expected value voltage generator produces expected value data by interpolation in accordance with incoming expected value data fewer in number than the expected value voltage to be generated, so as to be equal in number to the expected value voltage. This makes it possible to carry out an extremely short time and highly accurate test for output voltages of a device under test (liquid crystal driver LSI).

A charging method of a secondary battery having plural cells includes: connecting the plural cells in series and conducting constant current charging by a first power source; measuring voltages of the plural cells; and connecting the plural cells in parallel and conducting constant voltage charging by a second power source, a voltage of which is lower than a voltage of the first power source, in the case where a measured voltage difference among the plural cells is smaller than a specified value.

The invention provides a single battery being capable of resisting overloading and high-spinning and being high in capacity. A preparation method includes the steps of: successively tightly laminatinga nickel square-mesh net, a graphite sheet, positive powder, insulation powder, a negative pole sheet and a current collector; surrounding and compacting the outer rings of the insulation powder andthe negative pole sheet by a current blocking ring which is produced by mixing and pulping MgO and asbestos according to mass ratio of 2:1 and punching the mixture into a ring; the insulation powder is a mixture of LiCl-LiBr-LiF ternary eutectic substance and MgO according to the mass ratio of 1:1-1:1.5, wherein the mixture is compressed to form an insulation layer being 0.4-0.6 mm in thickness; the positive powder is a CoS2/FeS2 mixture according to the mass ratio of 1:1, wherein the positive powder also contains insulation powder accounting for 15-18% by mass of the positive powder and lithium oxide accounting for 2-5% by mass of the positive powder. The single battery has strong anti-severe environment capability, can output stable voltage and is high in specific energy, and also satisfies the demand of resisting overloading and high-spinning and being long in service life.

The invention discloses an avalanche photo diode (APD) bias voltage adjustment circuit based on negative voltage adjustment. The circuit includes a pixel outside bias voltage generating module and a pixel inside bias voltage adjustment module. The pixel outside bias voltage generating module uses a first operational amplifier and a second operational amplifier to clamp source voltages of a secondPMOS tube and a fourth PMOS tube to stepping voltage and 0V. The pixel inside bias voltage adjustment module uses a first current mirror unit and a first PMOS tube in the pixel outside bias voltage generating module to form a proportional current mirror structure, different proportions of mirroring are realized through controlling switches, and thus floating ground voltage is adjusted to an integer multiple of the stepping voltage. The pixel inside bias voltage adjustment module uses a second current mirror unit and a third PMOS tube in the pixel outside bias voltage generating module to forma current mirror structure, the floating ground voltage is clamped to 0V when all the switches in the first current mirror unit are turned off, and stepping adjustment of APD bias voltage is realized.A manner of negative voltage adjustment is adopted to expand an adjustment range of the APD bias voltage, and improvement of detection sensitivity of an APD array is facilitated.

The invention discloses an unscented Kalman SOC estimation method for a battery of a hybrid power system. The method comprises the following steps: establishing an equivalent circuit model based on afractional order theory; carrying out capacity test on the lithium iron phosphate battery of the hybrid power unmanned aerial vehicle under various working conditions; carrying out an open-circuit voltage hysteresis characteristic test on the lithium iron phosphate battery, and establishing a simplified open-circuit voltage hysteresis model; carrying out a parameter identification test, and carrying out parameter identification by adopting an optimization algorithm; and carrying out fractional order unscented Kalman filter SOC estimation. According to the SOC estimation method, the battery endvoltage can be better simulated under the condition of using fewer parameters and a simpler hysteresis model, and the SOC estimation accuracy is improved.

The invention discloses a boost power supply controller for a carrying spacecraft. The boost power supply controller at least comprises M boost circuits and a bus filter unit, wherein the M boost circuits are used for converting output voltages of N storage batteries into required voltages; M is a natural number greater than 1; an output positive terminal of each storage battery is connected with a battery bus bar through a battery input relay; each battery bus bar is electrically connected with an input positive terminal of at least one boost circuit; a positive power output terminal for of each boost circuit is connected with a same bus bar; negative power input and output terminals of all boost circuits all are electrically connected with a negative bus bar; the bus filter unit is used for filtering a high-frequency signal and a low-frequency signal on a bus; the bus filter unit comprises a hall sensor, a bus high-frequency capacitor and a bus low-frequency capacitor, which are sequentially connected with one another; the hall sensor is used for detecting a current between the bus bar and the positive terminal of the bus high-frequency filter capacitor; and the bus low-frequency capacitor is electrically connected with each load power supply interface through each load output relay.

The invention discloses a radio frequency high-voltage output amplitude automatic control system and method. The system comprises an industrial personal computer, a digital radio frequency signal generation module, a radio frequency high-voltage resonance circuit, a radio frequency current detection circuit, a radio frequency voltage detection circuit, a resonance boosting current detection circuit and an oscilloscope board card; the industrial personal computer, the digital radio frequency signal generation module and the radio frequency high-voltage resonance circuit are connected in sequence; an output end of the radio frequency high-voltage resonance circuit is connected with the radio frequency current detection circuit and the radio frequency voltage detection circuit, the radio frequency current detection circuit and the radio frequency voltage detection circuit are connected with the oscilloscope board card, and a current value and voltage value of an output signal of the radiofrequency high-voltage resonance circuit are measured through the oscilloscope board card; the oscilloscope board card is connected with the industrial personal computer, and the industrial personalcomputer reads the current value and voltage value of the output signal of the radio frequency high-voltage resonance circuit measured by the oscilloscope board card. The radio frequency high-voltageoutput amplitude automatic control system and method have the advantages that any output voltage can be acquired, the stability of the output voltage amplitude is high, the voltage precision is high,the response to voltage stabilization is fast, and the capacity of resisting disturbance is strong.

The invention discloses a charging and discharging control algorithm for a digital power box. The charging and discharging control algorithm comprises the following steps: sampling voltage and current of a lithium battery; judging the working state of the digital power box according to the sampling result, and selecting whether to give an alarm or not according to the judgment result; if a judgment result shows that a fault occurs, entering a fault state, and exiting a control process; if no fault occurs, receiving an upper command and analyzing the operation instruction; judging the operation instruction, and entering a corresponding state according to a judgment result. The invention further discloses a control system, and the control system comprises a proportional integral differential controller, an online adaptive zero-pole calculation structure, a feed-forward control structure, a zero-pole closed-loop control algorithm structure, a Buck/Boost circuit and a digital filter. The invention has the beneficial effects that the constant-voltage charging and discharging voltage precision and the constant-current charging and discharging current precision of the lithium battery are improved, and the response is quick in a full current basin range.