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2460 results about "Voltage range" patented technology

The voltage range can be measured easily with a voltmeter. All you have to do is set the meter to a maximum value above 12-15 volts (a 25 or 50-volt range should be enough), and touch the positive cable of the voltmeter to the positive terminal of the battery, and the negative cable of the meter to the negative terminal.

Self-biasing CMOS PECL receiver with wide common-mode range and multi-level-transmit to binary decoder

A pseudo-emitter-coupled-logic (PECL) receiver has a wide common-mode range. Two current-mirror CMOS differential amplifiers are used. One amplifier has n-channel differential transistors and a p-channel current mirror, while the second amplifier has p-channel differential transistors and an n-channel current mirror. When the input voltages approach power or ground, one type of differential transistor continues to operate even when the other type shuts off. The outputs of the two amplifiers are connected together and each amplifier receives the same differential input signals. The tail-current transistor is self-biased using the current-mirror's gate-bias. This self biasing of each amplifier eliminates the need for an additional voltage reference and allows each amplifier to adjust its biasing over a wide input-voltage range. Thus the common-mode input range is extended using self biasing and complementary amplifiers. The complementary self-biased comparators can be used for receiving binary or multi-level-transition (MLT) inputs by selecting different voltage references for threshold comparison. Using the same reference on both differential inputs eliminates a second reference for multi-level inputs having three levels. Thus binary and MLT inputs can be detected and decoded by the same decoder.

Primary side-controlled constant current switch power supply controller and primary side-controlled constant current switch power supply control method

The invention provides a primary side-controlled constant current switch power supply controller and a primary side-controlled constant current switch power supply control method. The controller comprises a current sampling end, a grounded end, a power supply end, a driving end, a voltage feedback end, a frequency setting end, a first sampling hold module, an average current ring module, a saw-tooth wave generation module, a comparison module, a second sampling hold module, a voltage/frequency conversion module, a driving pulse generation module and a driving module. The controller has a simple structure and can be used for realizing a high-power factor within a full-input voltage range while constant current is output; in addition, when output voltage is unchanged, work frequency of the circuit is basically constant, so that the work frequency meets the electromagnetic compatible standard more easily. The primary side-controlled constant current switch power supply controller and theprimary side-controlled constant current switch power supply control method can also be used for a direct-current input low-power power supply without requirement on a power factor so as to realize constant current output.


A straightforward and scalable solid-state synthesis at 975° C. used to generate cathode materials in the system Li(3+x)3Ni(1-x-y)CoyMn2x/3O2 {a combination of LiNiO2, Li2MnO3, and LiCoO2 as (1-x-y)LiNiO2.xLi2MnO3.yLiCoO2} is described. Coatings for improving the characteristics of the cathode material are also described. A ternary composition diagram was used to select sample points, and compositions for testing were initially chosen in an arrangement conducive to mathematical modeling. X-ray diffraction (XRD) characterization showed the formation of an α-NaFeO2 structure, except in the region of compositions close to LiNiO2. Electrochemical testing revealed a wide range of electrochemical capacities with the highest capacities found in a region of high Li2MnO3 content. The highest capacity composition identified was Li1.222Mn0.444Ni0.167Co0.167O2 with a maximum initial discharge capacity of in the voltage range 4.6-2.0 V. Differential scanning calorimetry (DSC) testing on this material was promising as it showed an exothermic reaction of 0.2 W/g at 200° C. when tested up to 400° C. Cost for laboratory quantities of material yielded $1.49/Ah, which is significantly lower than the cost of LiCoO2 due to the low cobalt content, and the straightforward synthesis. Li1.222Mn0.444Ni0.167Co0.167O2 is thought to be near optimum composition for the specified synthesis conditions, and shows excellent capacity and safety characteristics while leaving room for optimization in composition, synthesis conditions, and surface treatment.

High-efficiency AC/DC combined converter with wide output voltage range

The invention relates to an alternate current/direct current (AC/DC) energy converter, and aims to provide a high-efficiency AC/DC combined convertor with a wide output voltage range. The convertor of the invention comprises a filter, a rectifier bridge B1, a Buck PFC circuit, an uncontrollable DC/DC circuit, an output filter capacitor Co and a parallel AC/DC circuit, wherein the filter is connected with the rectifier bridge B1; a control terminal of a switching tube S1 in the Buck PFC circuit is connected with the output of a Buck PFC control circuit; the Buck PFC control circuit is connected with the output of a feedback control circuit; the feedback control circuit comprises an error amplifier and a signal isolating circuit; and the output side of the output filter capacitor Co is sequentially connected with an output signal sampling circuit, the error amplifier and the signal isolating circuit. The invention acquires high efficiency and high power factors when isolation and the wide output voltage range are realized, improves the efficiency of the AC/DC convertor connected with the Buck PFC circuit in parallel, can solve the problem of too high starting up surge current of a boost power-factor correction (Boost) circuit, and does not need a surge current suppressing circuit, thus improving the efficiency.
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