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Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 9 | Page No.: 1321-1326
DOI: 10.3923/jas.2007.1321.1326
 
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Design of Current-Mode Gm-C Filters from the Transformation of Opamp-RC Filters

Johana-M. Garcia-Ortega, Esteban Tlelo-Cuautle and Carlos Sanchez-Lopez

Abstract:
It is presented a method to design Current-Mode (CM) filters from the transformation of the well-known Voltage-Mode (VM) opamp-RC filters. First, it is shown the simulation of a low-frequency opamp-RC filter with stable high Q, by applying the Y-Δ transformation. Second, it is described the transformation of the VM opamp-RC filter to a VM Gm-C filter and the symbolic transfer functions of the VM Gm-C filter are derived. Third, it is shown the transformation of the VM Gm-C filter to a CM Gm-C filter and the symbolic transfer functions of the CM filter are derived to show that both, the VM and the CM Gm-C filters perform the same behavior. Finally, some guidelines are introduced to design CM filters with CMOS OTAs and current conveyors.
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How to cite this article:

Johana-M. Garcia-Ortega, Esteban Tlelo-Cuautle and Carlos Sanchez-Lopez, 2007. Design of Current-Mode Gm-C Filters from the Transformation of Opamp-RC Filters. Journal of Applied Sciences, 7: 1321-1326.

DOI: 10.3923/jas.2007.1321.1326

URL: https://scialert.net/abstract/?doi=jas.2007.1321.1326

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