Shanghai Wuqi Microelectronics Co., Ltd.

Shanghai Pudong New Area People's Hospital

Qiang Gu

Zhonghua Du

Like Zhao

Mingao Zhang

Zhaofeng Zhu

Wanju Sun

Bias circuits for CMOS power amplifiers are provided. The bias circuit includes a feedback module, a first bias module, and a second bias module. The feedback module has a first input connected to a output common mode voltage, a second input connected to a reference voltage, and an output connected to gates of main amplification transistors in a first differential amplification module; based on a difference between the output common mode voltage and the reference voltage, the feedback module adjusts gate voltages of main amplification transistors until the output common mode voltage is equal to the reference voltage; the first bias module provides bias voltages for the first differential amplification module; the second bias module provides bias voltages for a second differential amplification module. The present disclosure adopts direct negative feedback and cascoded current mirrors, which realize accurate DC gate bias and accurate control of the output common mode voltage.

Bias circuit and power amplifier

The present invention provides a medical self-service terminal service method and system thereof. It is based on the integrated IHE information management system, radiology management system, digital image technology, computer technology, and tele-communication technology. It converts information and images of the patient and diagnosis information of doctors into digital computer information and stores them in a server. The patient information and medical image data can be called in, displayed, printed, and output via a network. Human-oriented animated interfaces and accurate and simple operation options help patients choose all kinds of self-services needed, such as registration, log-in, photograph pickup, report pickup, and querying, through human-computer interaction in different periods of time.

Self-service medical service method and its system

Growing community of inventors

Shanghai, China

Qiang Gu