Chinese Academy of Sciences

Beijing Xintianyu Technology Development Co., Ltd.

Haiyong Wang

Jingjing Chen

Nanjian Wu

Jing Li

Zhao Zhang

Xiaodong Liu

Peng Feng

Wenfeng Lou

Weiyang Liu

A wireless radio-frequency transmission apparatus includes a phase frequency detector, a charge pump, a loop filter and a twin voltage-controlled oscillator. The twin voltage-controlled oscillator includes a first oscillator and a second oscillator. When the twin voltage-controlled oscillator is in a reception mode, the first and the second oscillators are coupled to each other to form a quadrature voltage-controlled oscillator, and the quadrature voltage-controlled oscillator, the phase frequency detector, the charge pump and the loop filter constitute a phase-locked loop to generate quadrature carriers. When the twin voltage-controlled oscillator is in a transmission mode, the first oscillator, the phase frequency detector, the charge pump and the loop filter constitute a phase-locked loop, and the second oscillator performs frequency modulation on transmitted data. The present disclosure can maintain a carrier frequency to be stable during high data rate transmission, and have a relatively short locking time of frequency hopping.

Wireless radio-frequency transmission apparatus

The present disclosure discloses a multi-standard performance reconfigurable I/Q orthogonal carrier generator. The generator may implement a continuously covered I/Q carrier output of 0.1-5 GHz and continuously covered differential signal outputs of 5-10 GHz and 1.5-3 GHz by means of reasonable frequency assignment; also, carrier signals under various frequencies with different loop bandwidths, different phase noises, different power consumption levels and different locking times can be generated by configuring a programmable charge pump (), a loop filter () parameter, a multi-path voltage-controlled oscillator () and a first multiplexer () corresponding thereto, a five-stage-division-by-two frequency division link () and a corresponding second multiplexer () and third multiplexer (), so as to implement generation of a multi-standard performance reconfigurable I/Q orthogonal carrier.

Multi-standard performance reconfigurable I/Q orthogonal carrier generator

Provided in the present invention are a cocrystal of piperacillin sodium and sulbactam sodium and preparation method thereof, as well as pharmaceutical compositions containing the same and uses thereof in treating infections caused by drug-resistant bacteria, such as a 'super bacterium' producing NDM-1 and the like. The cocrystal of piperacillin sodium and sulbactam sodium contains diffraction angles of 14.24&#xb0;, 16.58&#xb0;, 16.79&#xb0;, 17.77&#xb0;, 19.20&#xb0;, 20.21&#xb0;, 20.39&#xb0;, 23.06&#xb0;, 27.86&#xb0; and 32.16&#xb0; represented by 2&#x3b8; in an X-ray powder diffraction analysis spectrum.

Cocrystal of piperacillin sodium and sulbactam sodium and preparation method thereof, as well as pharmaceutical compositions containing same and uses thereof

Growing community of inventors

Beijing, China

Haiyong Wang