The remaining big part of the computer is a means of generating certain special functions (sine, cosine, their inverses, and desirably, Bessel and the like) of a voltage. Two attempts so far. The first (converting a ramp waveform into a sine wave; sampling the sine wave when the input voltage (x) equals the ramp voltage) ended up as being considered too complicated and capricious. The second, resorting to a classical diode function generator (DFG), made the component count of the first attempt look positively pedestrian...
That's a sixteen breakpoint DFG - and (if set correctly!) would do just one function. Even replacing the potentiometers with resistors would leave an awful lot of parts and board space. The third attempt - which is still on the drawing board - is looking a tad digital...
That's a sixteen breakpoint DFG - and (if set correctly!) would do just one function. Even replacing the potentiometers with resistors would leave an awful lot of parts and board space. The third attempt - which is still on the drawing board - is looking a tad digital...
