Switched-Current Filters by Component Simulation

This paper discusses the synthesis of switched-current filters from continuous-time prototypes by the simulation of components, particularly capacitors and transconductors in Transconductance-C filters. The obtained structures implement discrete-time versions of the prototype circuit using bilinear or Euler formulas. All the proposed structures work with doubled effective sampling rate (sampling the input and updating the output at each phase), make strict use of voltage-sampling switches and naturally admit two-phases nonoverlapping clocks.