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Voltage Controlled Oscillator (VCO) demo project showing use of the Pins Annotation component. The VCO design is based on the 1-shot architecture, and provides high input impedance, good linearity and >50db dynamic range using minimal hardware resources. Project archive is provided above. Full project description can be found in the Pins Annotation datasheet (Appendices 1-2).
Figure 1. VCO using 1-shot architecture. Top - PSoC schematic, Bottom - project annotation using Pins Annotation component. Left - integrator, Right - 1-shot Timer.
Figure 2. VCO traces at Vctr=1V: Fuchsia - VCO output, Yellow - Opamp output terminal, Cyan - 1-shot Timer output.
Figure 3. VCO output frequency vs. control voltage.