Reducing SSN by Mismatching Technique
In CMOS circuits, where consumption is not steady,current peaks produce voltage drops through the inductance,which manifest themselves as fluctuations in the internal supply voltages. This kind of noise is known as delta-I noise, simultaneous switching noise (SSN) or ground bounce.This paper describes a novel method to reduce the SSN: on -chip microstrip-mismatching technique in the power supply wire. The microstrip is connected with the bonding wire. The microstrip is embedded in Si dielectric upon Si substrate and does not increase the size of the chip. Not only the impedance mismatching technique between the bonding wire and the microstrip is considered in order to get noise source reflection coefficient |Γg|=1 at the end noise source- bonding wire, but also the microstrip length is properly designed to get source reflection coefficient Γgout =-1 at the end microstrip and make the input impedance of the microstrip looking out from the CMOS unit at nodes p and n close to zero, thereby shortening out the noise voltage. Si has high dielectric constant and can also greatly attenuate the noise because of high dielectric loss. The results of S21 depicts that the transmission coefficient is around -40dB. The technique developed in this paper has the advantage of simplicity, easy realization, non-oscillation and there is no size, weight and power dissipation penalties.
Huifen Huang QingXin Chu Jiankang Xiao
School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China
国际会议
第八届电子封装技术国际会议(2007 8th International Conference on Electronics Packaging Technology ICEPT2007)
上海
英文
217-220
2007-08-14（万方平台首次上网日期，不代表论文的发表时间）