Grounded-Capacitor First-Order Filter Using Minimum Components

Hua-Pin CHEN  Kuo-Hsiung WU  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E89-A   No.12   pp.3730-3731
Publication Date: 2006/12/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e89-a.12.3730
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Circuit Theory
first-order filter,  active filters,  current conveyors,  

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Despite the extensive literature on current conveyor-based voltage-mode first-order all-pass filters, no filter circuits have been reported to date that simultaneously achieve all of the advantageous features: (i) the employment of only one current conveyor, (ii) the employment of only one grounded capacitor, (iii) the employment of only one resistor, (iv) no need to impose component choice conditions, and (v) low active and passive sensitivities. In this letter, we describe such a filter structure with all of the above features simultaneously present, without trade-offs. H-Spice simulation results using the TSMC025 process and 1.25 V supply voltages validate the theoretical predictions.