Symbolic analysis of analog circuits containing voltage mirrors and current mirrors

  • Authors:
  • E. Tlelo-Cuautle;C. Sánchez-López;E. Martínez-Romero;Sheldon X.-D. Tan

  • Affiliations:
  • INAOE, Tonantzintla, Mexico;UAT, Apizaco, Tlaxcala, Mexico and IMSE-CSIC, Sevilla, Spain;INAOE, Tonantzintla, Mexico;University of California, Riverside, USA

  • Venue:
  • Analog Integrated Circuits and Signal Processing
  • Year:
  • 2010

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Abstract

The pathological elements voltage mirror (VM) and current mirror (CM) have shown advantages in analog behavioral modeling and circuit synthesis, where many nullor-mirror equivalences have been explored to design and to transform voltage-mode circuits to current-mode ones and viceversa. However, both the VM and CM have not equivalents to perform automatic symbolic circuit analysis. In this manner, we introduce nullor-equivalents for these pathological elements allowing to include parasitics and to perform only symbolic nodal analysis. The nullor-equivalent of the CM is extended to provide multiple-outpus (MO-CM). Finally, two active filters containing VMs, CMs and MO-CMs are analysed to show the usefulness of the models.