Switched Capacitor and Active-RC Filter Layout Using a Parameterizable Generator

Takao KANEKO  Yukio AKAZAWA  Mitsuyoshi NAGATANI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E75-A   No.10   pp.1301-1305
Publication Date: 1992/10/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
switched capacitor filter,  active-RC filter,  analog layout,  

Full Text: PDF>>
Buy this Article

An automatic macrocell generator has been developed and applied to the analog layout of SC and active-RC filters. The generator consists of a process independent generation procedure, a leafcell library, and a circuit description of the leafcells. The unit element arrays of the whole filter are generated together to minimize the array height of the entire filter macrocell, so that the area of the generated filter is as small as that of a manually laid out filter. Three SC filters and one active-RC filter were designed and fabricated by 1.5-µm CMOS technology, that successfully yielded an S/N ratio of more than 70 dB with a quick turn around time.