Multiples and mixing utilities

Links provides 3 utility functions focused on signal distribution and mixing.

1:3 is a 3-output buffered multiple, with an offset error
2:2 is a 2-input summer with unity gains. The sum of the two input channels is distributed to 2 outputs.

3:1 is a 3-input mixer with a gain of 1/3 for each channel (averager). It is particularly suitable for rapidly mixing audio sources such as oscillators, for which a unity gain mixer would have caused clipping.

A 2-color output monitoring LED is available for each of these functions.


Technical characteristics

Input impedance: 1M for the buffered multiple, 100k for the mixers.
All inputs DC-coupled.
Buffered multiple with low offset error.
4-HP.
Current consumption: /-12V: 15mA.