W
[email protected]
- Jan 1, 1970
- 0
I'm trying to figure out a way to create a simple function generator
circuit that produces square and triangle waveforms. These could be
skewed with a pot to produce a variable duty cycle at the square wave
output, and sawtooth waveforms at the triangle output. There are some
excellent chips that can do this, but the output frequencies are
usually controlled by a resistor-capacitor network or an input voltage
(VCO). I would like to control the output frequency of the circuit
with a square wave input so that the frequency of the various output
waveforms is slewed to the frequency of the input square wave. I
suppose I could use a frequency to voltage chip to control a VCO type
function generator but this seems overly complicated. I could
integrate the input square wave to get a triangle, but I want to be
able to vary the duty cycle/skew with a pot (10K - 100K) so I could
morph the triangle wave into a sawtooth. This all has to happen at
audio frequencies. Anybody have any ideas?
circuit that produces square and triangle waveforms. These could be
skewed with a pot to produce a variable duty cycle at the square wave
output, and sawtooth waveforms at the triangle output. There are some
excellent chips that can do this, but the output frequencies are
usually controlled by a resistor-capacitor network or an input voltage
(VCO). I would like to control the output frequency of the circuit
with a square wave input so that the frequency of the various output
waveforms is slewed to the frequency of the input square wave. I
suppose I could use a frequency to voltage chip to control a VCO type
function generator but this seems overly complicated. I could
integrate the input square wave to get a triangle, but I want to be
able to vary the duty cycle/skew with a pot (10K - 100K) so I could
morph the triangle wave into a sawtooth. This all has to happen at
audio frequencies. Anybody have any ideas?