Wired CDMA Interface with Adaptivity for Interconnect Capacitances

Tsukasa IDA  Shinsaku SHIMIZU  Toshimasa MATSUOKA  Kenji TANIGUCHI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E88-A   No.10   pp.2702-2706
Publication Date: 2005/10/01
Online ISSN: 
DOI: 10.1093/ietfec/e88-a.10.2702
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Nonlinear Theory and its Applications)
CMOS analog circuit,  variable gain amplifier,  CDMA,  

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Wired CDMA interface with adaptivity for interconnect capacitances is designed to receive transmitted data even under a wide variety of connection topologies. The variable gain amplifier (VGA) is one of key circuit blocks to realize the adaptivity for interconnect capacitances. The system level numerical simulations derive the VGA specifications that the required VGA gain range is from 0.37 to 2.0, which can be realized easily using a multiple-differential-pair technique.