6results about How to "Increase the voltage value" patented technology

This invention discloses a computer chassis movement alarm device based on information security, comprising a chassis body, a bottom cover fixedly connected to the lower side wall of the chassis body, a battery box installed on the inner top wall of the chassis body containing a battery, a buzzer installed on the inner wall of the chassis body, and multiple speaker holes on both side walls of the chassis body. A movement alarm mechanism is located inside the bottom cover, comprising a ceramic cylinder mounted on the inner top wall of the bottom cover, with a resistance wire wound around its outer wall. A crossbar connects the two inner walls of the bottom cover. This invention provides a double-layered alarm effect by automatically emitting an alarm sound when the chassis is moved or lifted. Furthermore, the alarm sound increases in volume as the movement or lifting increases, thereby improving the alarm effect of the computer chassis and preventing serious damage.

The invention discloses a phase-locked loop circuit, a phase locking method and a frequency synthesizer, and the phase-locked loop circuit employs a phase rolling clock signal generation unit to carry out integer frequency division processing on a plurality of oscillation clock signals with uniformly-changed phases, obtains a plurality of feedback clock signals with uniformly-changed phases, and carries out frequency division processing on the feedback clock signals according to a preset clock period. The feedback clock signals with the corresponding phase sequence are selected from the multiple feedback clock signals with the uniformly-changed phases to be spliced, the phase rolling clock signal is generated, and the N-fractional frequency division phase-locked loop can be achieved, and compared with the mode that an SDM circuit is used for achieving the N-fractional frequency division phase-locked loop, the N-fractional frequency division phase-locked loop can be achieved more accurately. The occupied area and power consumption of the circuit are saved, and the performance of the phase-locked loop circuit is improved.

The invention discloses an auxiliary discharging method for a lithium battery pack in the technical field of lithium batteries. A lithium battery stack, a protection plate, a supercapacitor and a discharging / charging socket are included. The lithium battery stack, the protection plate, the super capacitor and the discharging / charging socket are electrically connected to form a discharging loop, and the discharging capacity of the lithium battery pack is improved through the rapid charging and rapid discharging characteristics of the super capacitor, so that the working voltage of the lithium battery pack is within a specific range, and the auxiliary discharging effect is achieved. According to the scheme, the problem that the discharge performance of the lithium battery cannot meet the working condition under the condition that the working voltage has strict requirements is solved.

This application discloses a display device. The display device includes a display panel and a driving module. The display panel includes multiple data lines and multiple sub-pixels connected to the data lines; within one frame display period, each sub-pixel corresponds to a grayscale level for display, and each grayscale level has a positive polarity voltage and a negative polarity voltage symmetrical with respect to a common voltage. The data lines are used to output a corresponding data voltage to each sub-pixel. The driving module is connected to the display panel to output the data voltage to the data lines. The driving module includes an adjustment unit, which is used to increase the voltage value of the positive polarity voltage to obtain a compensated positive polarity voltage. The data voltage is either a negative polarity voltage or a compensated positive polarity voltage. This application can improve the charging uniformity of the display panel, improving the display effect while avoiding other image quality problems.

The disclosure provides a gate drive circuit and method, and belongs to the technical field of semiconductor devices. The gate drive circuit comprises a comparator configured to compare the size of a drain current of a transistor and a reference current; a counter configured to periodically obtain a result of the comparator, the result of the comparator being used to indicate whether the drain current exceeds the reference current; when the drain current does not exceed the reference current, the count is increased by one; when the drain current exceeds the reference current, the count is stopped; a driver configured to provide a gate drive voltage for the transistor, and periodically increase the gate drive voltage until the counter stops counting; determine a critical voltage corresponding to the count value of the counter when the count is stopped, and increase the voltage value based on the critical voltage to obtain a saturation voltage; and use the saturation voltage as the gate drive voltage.

The present application provides an ultrasonic transceiver system and an electronic device, wherein the ultrasonic transceiver system includes a signal generating circuit and an ultrasonic sensor chip. The signal generating circuit is composed of discrete devices and includes a pulse generating circuit and a resonant circuit. The pulse generating circuit receives a control signal output by the ultrasonic sensor chip, and generates a first pulse voltage signal and a second pulse voltage signal in anti-phase according to the control signal. The resonant circuit receives the first pulse voltage signal and the second pulse voltage signal in anti-phase and generates a driving signal under the action thereof. The ultrasonic sensor chip receives the driving signal and generates an ultrasonic signal according to the driving signal. When generating the driving signal, the voltage value of the driving signal can be increased by the anti-phase first pulse voltage signal and the second pulse voltage signal without the need for a boost operation, thereby overcoming the circuit complexity problem caused by the boost and the problem of poor driving effect caused by the low voltage value. The circuit structure is simple, easy to implement and control, and has a good boost effect.