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Symbolic analysis of analog circuits containing voltage mirrors and current mirrors

  • Author(s): Tlelo-Cuautle, E.
  • Sánchez-López, C.
  • Martínez-Romero, E.
  • Tan, Sheldon X.-D.
  • et al.
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.

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