PASSIVE TRANSIENT RECORDING SYSTEMS

Methods and apparatus for recording pulse signal information utilizing threshold integrating devices in which a pulse shaped signal is applied to a plurality of threshold integrating devices each having a predetermined quantity of electric charge carriers stored therein, in which the threshold integrating devices are responsive to application of electric potentials above a predetermined threshold potential value for altering the amount of charge stored in the charge storage zone of the threshold integrating devices. By providing a plurality of threshold integrating devices each having a different threshold potential, significant signal information may be obtained by passive application of the pulsed signal to a plurality of the devices. This signal information may be obtained by determining the amount of charge in the charge storage zones of the respective threshold integrating devices subsequent to application of the pulsed signal thereto.