5results about How to "Large resistance" patented technology

This application discloses a heating element, an atomizing module, an atomizer, and an electronic atomizing device. It belongs to the field of aerosol generation technology. In the heating element of this application, by setting the heating wire to alternately connect a first part and a second part, and by having different resistance values ​​for the first and second parts, the temperatures of the first and second parts are different when the heating element is energized. Therefore, the part with higher resistance has a relatively higher temperature, and the part with lower resistance has a relatively lower temperature. Thus, the temperature distribution of the heating wire is also an alternating distribution of high and low temperatures, effectively avoiding high temperatures concentrated in the middle of the heating wire, which would cause excessive heat and carbon buildup at that location. Furthermore, the relatively higher temperature part in the first and second parts can directly transfer the high temperature to the adjacent relatively lower temperature part, thereby improving the heat dissipation effect of the heating element.

The application provides a data reading circuit of an MRAM chip, comprising: a to-be-tested storage unit, a first gating transistor connected in series with the to-be-tested storage unit, a reference unit, a second gating transistor connected in series with the reference unit, and a readout amplifier, wherein the reference unit has three optional reference resistance branches, including a working mode branch, a first test mode branch and a second test mode branch, the working mode branch is used for reading data of the to-be-tested storage unit, the first test mode branch is used for screening out fixed failure units and high-resistance state out-of-range failure units with an open-circuit failure type, and the second test mode branch is used for screening out fixed failure units and low-resistance state out-of-range failure units with a short-circuit failure type.

The invention discloses a quiescent current detection circuit and device, and relates to the technical field of current detection. The resistors in the voltage dividing network are sequentially connected between the power supply and the ground in series, and the resistance values of the resistors are sequentially increased in a multiplied manner, so that the wide-range coverage from nA to 1A is realized. And each resistor in the voltage dividing network corresponds to each measuring gear, so that the precision measurement that one measuring range corresponds to one measuring gear is realized. The external pin corresponding to the first end of the voltage division network is connected to the measurer, and the quiescent current of the module to be tested can be judged by testing the voltage corresponding to different current target resistors, the voltage value measured by the measurer, the known resistance value of the voltage division network and the known resistance value of the current sampling circuit. Complicated detection instruments do not need to be adopted, the detection mode and peripheral detection instruments are simple, scene adaptability is high, detection circuit devices are few, cost is low, universality is high, and large-scale application is easy. And the requirements of relatively large measuring range and relatively high sensitivity can be met.

The invention discloses a self-adaptive soft turn-off circuit of a power switch device, and relates to the technical field of electronic circuits, the self-adaptive soft turn-off circuit comprises a turn-off control module, a detection module, an energy storage delay module and a soft turn-off execution module, and the detection module and the energy storage delay module are connected in series and then are connected between a drain electrode and a source electrode of the power switch device. The detection module, the energy storage delay module and the power switch device form a drain-source electrode loop, and the energy storage delay module is controlled to store energy or discharge when a comparison result of drain-source electrode voltage and a preset safety threshold value in the turn-off process of the power switch device. And dynamically adjusting the resistance value of the soft turn-off resistor connected to the grid electrode of the power switch device according to energy storage or discharge, and adjusting the turn-off speed of the power switch device. A control signal is generated through energy storage, the resistance value of a soft turn-off resistor connected into a grid electrode of a power switch device is dynamically adjusted, the turn-off speed of the power switch device is reduced, and therefore voltage spikes are restrained.

This utility model belongs to the field of power battery safety technology, and discloses a power battery terminal and cell with a fusible protection structure. The terminal includes a terminal body, which comprises a substrate layer and a fusible layer stacked on top of each other. The fusible layer has a hollowed-out fusible area, within which at least one cavity is formed. A high-resistivity material layer is deposited on the inner wall of the cavity. The hollowed-out fusible area of ​​the terminal body of this utility model has a cavity, and the high-resistivity material is deposited on the cavity surface. This reduces the current-carrying area of ​​the terminal and increases the terminal resistance, allowing heat to accumulate rapidly at the terminal to the material's melting point during a short circuit, quickly melting and blocking the current, thus reducing the risk of thermal runaway of the cell.