Conference Proceedings

Distortion analysis of 30Gsample/s CMOS switched source follower

H Liang, RJ Evans, E Skafidas

ISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems | Published : 2010


Volterra analysis of the ultra high-speed CMOS switched source follower (SSF) track and hold amplifier (THA) is presented based on a simplified RF model. Approximate expressions for the transfer function, the harmonic equations and third-order intermodulation distortion equation are derived respectively. Simulations based on a commercial available 65 nm CMOS process technology are performed with the SpectreRF circuit simulator. It is shown that when operating with ultra high input frequency , the total harmonic distortion (THD) linearity degrades progressively. Comparative SpectreRF simulated results for SSF THA have shown good agreement with Volterra analytical results by using the simplifi..

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