Schisandrin B is an extract from a Chinese medicine, which is well known of treating various cardiovascular diseases and many other conditions.The invention reveals the method of preparation of Schisandrin B, and how to use it in prevention and/or treatment of heart diseases or other related conditi.....
[更多]
Frequency-divider circuit is a key building block of phase-locked-loop (PLL) and frequency synthesizer (FS) circuits, which are required for all data communication and telecommunication systems. However, the failure of frequency-divider circuits functioning at low-voltage high-frequency operation is.....
[更多]
Internet Protocol (IP) networks are originally designed to support a best-effort service. It does not guarantee reliable and timely delivered packets. As IP networks mature and are increasingly being used to support real-time applications, such as voice and video on the IP platform, the existing IP .....
[更多]
Conventionally, frequency tuning is achieved by changing the capacitance of a tank using varactor. However, it is more power efficient to minimize the capacitance of the tank and adjust the inductance for frequency variation. Therefore, the need for a variable inductor arises.A novel integrated vari.....
[更多]
The invented double-balanced quadrature-input quadrature-output divider (QIQOD) is based on conventional multiplier-based regenerative dividers but employs four different feedback loops with appropriate phase shifts. By making use of quadrature phase outputs from any quadrature signal generator, the.....
[更多]
| |< <- | [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] | -> >| |
