Design and realization of accurate parasitic parameter extraction tool;

Based on design requirements of analog channel of DAQ system,according to actual problems to be solved in high-speed analog channel,such as parasitic parameter of circuit element,source noise and high frequent crosstalk on PCB,research has been carried out.

For the geometric sizes,asymmetrical electrical parameters and magnetic circuit parameters and parasitic parameters,analyze the reason of zero voltage and how to eliminate residccal voltage.

Changing the thickness of the insulator layer between the primary and the secondary can obtain different values of parasitic parameters and a new method to avoid parasitic oscillations with dangerous high voltage spikes to improve the .

It is proved that the inverter-input-side parasitic parameters of the DC cable have trivial effects on CM EMI and the parasitic capacitors between the inverter and the ground have significant effects on CM EMI as well as the parasitic capacitors between motor windings and motor shell.

The effects of parasitic parameters on the CM noise spectrum are also analyzed.

The thermokinetic oscillation in a homogenous nonisothermal singbe component schlgl model system under a certain boundary condition is analyzed, by use of small parasite parameter and linearized stability analysis, both analytically and with computer.

All the packaging parasitics and the intrinsic characteristic parameters of the photodiode chip are accurately measured with microwave network analyzer.