This function is a controlled square wave oscillator with parameterizable
values of low and high peak output, duty cycle, rise time, and fall time. It
takes an input voltage or current value. This value is used as the
independent variable in the piecewise linear curve described by the
coordinate points of the cntl_array and
freq_array pairs. From the curve, a frequency
value is determined, and the oscillator will output a square wave at that
frequency.
Array sizes of 2 for both the
cntl_array and the freq_array
will yield a linear variation of the frequency with respect to the
control input. Any sizes greater than 2 will yield a piecewise
linear transfer characteristic.
Alternatively to the pair of parameters cntl_array and freq_array it is possible to determine the frequency of the VCO using the pair of parameters FC and KF.
Parameters
| Parameter | Description | Units | Default | Limits |
|---|---|---|---|---|
| FC | Center Frequency. | Hertz | 1Meg | min=0 |
| KF | Frequency sensitivity in Hz/Volt. | Hertz/Volt | 100K | |
| cntl_array | Control in array. Enter a list of values, using spaces as separators. | Volts | ||
| freq_array | Frequency array. Enter a list of values, using spaces as separators. | Hertz | min=0 | |
| out_low | Output low value. | Volts | 0 | |
| out_high | Output high value. | Volts | 5 | |
| duty_cycle | Duty cycle. | 0.5 | min=1e-6, max=0.999999 | |
| rise_time | Rise time. | seconds | 1n | |
| fall_time | Fall time. | seconds | 1n |
Error Messages
- SQUARE: Size of control array different than frequency array.
-
This error message normally occurs whenever the controlling input array and the frequency array are different sizes.