Buffer Seguidor de Fonte de alta Velocidade e Baixa Distorção em CMOS (A High-Speed Low-Distortion CMOS Source Follower Buffer)

Marcel Veloso Campos (marcelvelosocampos@yahoo.com.br)1, Carlos Alberto Reis Filho (carlos_reis1@yahoo.com)2


1Universidade Estadual de Montes Claros
2Fundação Universidade Federal do ABC

This paper appears in: Revista IEEE América Latina

Publication Date: March 2013
Volume: 11,   Issue: 2 
ISSN: 1548-0992


Abstract:
This paper discusses the design and implementation of a pseudo-differential high-speed and highly linear novel Source-Follower Buffer in 0.35µm CMOS. The high linearity of Source Follower is achieved by means of a cascode transistor and an auxiliary structure to mitigate impact of channel modulation and parasitic capacitances. The new architecture consumes 10 mW from a 3.3-V supply and it achieves a total harmonic distortion of -74.5 dB at 100MHz, yielding 12-b resolution. Design methodology, simulation and experimental results are presented.

Index Terms:
Source Follower, Linearity, A/D Converters, Total Harmonic Distortion   


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