Novel current-mode waveform generator with independent frequency and amplitude control

In this paper, a novel square/triangular-waveform generator using second generation current conveyer (CCII+), four resistors and a capacitance with independent control of frequency and amplitude are presented. Frequency (time period) can be tuned independently either by the grounded resistors R or R₂, or, by the grounded capacitor C over the range of DC to 300 kHz. The performance of the proposed design is explored using SPICE Level 1 models where it demonstrated good agreement with the theoretical results. Measured results using commercially available CCII+ is also included. The topology is suitable for VLSI realization.