Log plot of the frequency versus control voltage for the two-octave linear-in-pitch VCO. [X axis = VCON volts (inverted), Y axis = Hz / 16 = 250 Hz to 1 kHz]
| Authors | Stephen Woodward |
| Main Document | Article «Can a free running LMC555 VCO discharge its timing cap to zero?» |
| Description | Figure 3 |
| File Format / Size | PDF / 5 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «Can a free running LMC555 VCO discharge its timing cap to zero?»
- Figure 1. 555 VCO discharges timing cap C1 completely to the negative rail via a Reset pulse
- Figure 2. The VCO waveforms; reset pulses at the end of each timing cycle, and is triggered when VC1 = VCON, to force an adequately complete discharge of C1
- Figure 3. Log plot of the frequency versus control voltage for the two-octave linear-in-pitch VCO. [X axis = VCON volts (inverted), Y axis = Hz / 16 = 250 Hz to 1 kHz]
- Figure 4. R4 sums ~6% of VCON with the C1 timing ramp to get the improvement in linearity shown in Figure 5
- Figure 5. The effect of the R4 modification showing a linearity improvement. [X axis = VCON volts (inverted), Y axis = Hz/16]
