CGS96 - Serge Triple Comparator

The TRIPLE COMPARATOR consists of three independent functions which are useful in the production of square waves and variable pulse waves. The Comparator reference level can be a time-varying control voltage, a complex audio signal, or a fixed preset voltage. Additionally, the comparators are useful for level detection and for logic decisions based on amplitude. The module also contains a single, non-adjustable, Schmitt trigger.

When running from +12 volts, the output of the Schmitt trigger will rise to about 5 volts when the input falls below approximately 0.6 volts and will  fall to approximately 0 volts when the input rises over approximately 4.3 volts. This section of the module is frequently left off panels.

It will work on either +12 volts, or +15 volts. No negative power rail is used.

A little on how it works:

The schematic for the Triple Comparator. The upper part of the diagram shows the Schmitt Trigger, while below that are three identical comparators. At the very bottom is the local "6 volt" regulator. (This will supply a higher voltage when the module is run from 15V, unless the values of R2 and R3 are swapped.)