Osc reset time

[Arthur Harrison]

DT:

>> Isn't this the way that Exar function generator chip works?  No
>> matter, I think this approach is new for electronic music work.

AH:

The 2206 and 2209, to my knowledge, are emitter-coupled multivibrators.
Good points:  Excellent temp. stability, good PSRR.
The 2206 makes a fairly nice sine, and even has a VCA of sorts, good for
about 55dB of dynamic range.

Bad points:  Non linear (too non-linear for most music apps) and a peculiar
hsyteresis at low control currents.


DT:

>> As Colin pointed out, a simultaneous triangle output would be an
>> octave below.  It would also have glitches at the peaks.  Better to
>> run a second current source, cap, and buffer for the triangle --
>> effectively a second VCO, heavily syncd.

AH:

Well, if you full-wave rectify a triangle, you will get a triangle an octave
higher.