Window Discrimination Using Integrated Circuits

A differential amplitude or window discriminator is described which employs inexpensive integrated circuits and performs over an extremely wide frequency range (5 Hz-100 kHz for a sine-wave input). The discriminator can be employed in neurological studies, such as the separation of action potentials obtained from microelectrode recordings. Accessory circuits are also described which allow pulse rate to voltage conversion, and simultaneous observation on a single-channel oscilloscope of threshold levels, input signal, and discriminator output.