Other

O2 Micro, Incorporated

Hangzhou Silan Microelectronics Co., Ltd.

Chengdu Medart Medical Scientific Co., Ltd

Jun Wang

Jian Wu

James Wang

Weihua Zhang

Jinghua Zou

Mei Yu

Yongqiang Yu

Ke Gao

Xiuzhen Wang

Zhihua Ning

Mao Liu

Zexian Song

Xiaojin Zhang

Huajie Chen

A fixing device and an installation tool and a fixing method of the cranial flap, wherein the installation tool comprises a driving part, a loading part and an over torque protection mechanism disposed between the driving part and the loading part, the driving part drives the loading part to rotate by the over torque protection mechanism, the loading part is used for tightening the cranial flap fixation device, when the torque of the driving part acting on the over torque protection mechanism is larger than the threshold value, the over torque protection mechanism will be separated from the driving part and/or the loading part. The present invention not only effectively improves the installation and disassembly efficiency of the installation tool, but also eliminates hidden safety hazards caused by uncertainties caused by human factors in the tightening process, significantly improves the safety of the installation process.

Fixing device, installation tool and fixing method of the cranial flap

A switching converter, control method control circuit thereof are disclosed. The switching converter converts a DC input voltage into a DC output voltage. The control circuit comprising: a compensation module, generating a ramp signal; a comparator, compares a first superimposed signal related to the DC output voltage with a second superimposed signal related to an error signal between the DC output voltage and the ramp signal; a first RS flip-flop generates a pulse width modulation signal in accordance with a set signal and a reset signal, obtains a constant on time in accordance with the reset signal, and obtains an off time related to the DC output voltage; and a driving module which converts the pulse width modulation signal into a switching control signal, wherein the compensation module adaptively adjusts the slope of the ramp signal. The control circuit adopts an adaptive ramp signal to perform compensation.

Switching converter, and control method and control circuit thereof

Method and apparatus for controlling an electrical device and a wireless charging device, each comprising one or more modules. An interrupt signal is received. A type of the interrupt signal is determined. A first module is activated based on the type of the interrupt signal to perform one or more functions. The electrical device and the wireless charging device share at least the first module.

Method and apparatus for controlling an electrical device and a wireless charging device

A method of extracting Te and bismuth oxide and recovering byproduct comprises: leaching raw materials with a Te content of &#x2267;1.8% by utilizing a leaching system containing HSO, Cl, Br, NHand NaClO, reducing leach solution with SOgas by precipitation method after separating impurities from it, washing with concentrated hydrochloric acid to obtain tellurium precipitation (18), purifying to obtain Te with a purity of higher than 99.99%. The filtrate produced is used for extracting BiOwith a purity of higher than 99.99% when Bi content in the raw material is &#x2267;2%. Acidic waste solution produced during the process could be returned to the leaching step for recycle.

Method of extracting Te and bismuth oxide and recovering byproducts

Growing community of inventors

Chengdu, China

Jun Wang