Varying the reference voltage instead of the R-C time-constant gives a tuning law that is close enough to being linear in pitch over a couple of octaves, especially after adding R2
| Authors | Nick Cornford |
| Main Document | Article «A pitch-linear VCO. Part 1 - Getting it going» |
| Description | Figure 2 |
| File Format / Size | PDF / 25 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «A pitch-linear VCO. Part 1 - Getting it going»
- Figure 1. A typical relaxation oscillator with an exponentially decaying sawtooth output, is the starting point for this design
- Figure 2. Varying the reference voltage instead of the R-C time-constant gives a tuning law that is close enough to being linear in pitch over a couple of octaves, especially after adding R2
- Figure 4. Adding a voltage-controlled current sink in place of tuning resistor R1 is the key to operation over more than 4 octaves with much better pitch accuracy
