Abstract: A female connector receptacle has been designed to incorporate replaceable modules for effecting EMI/RFI/EMP protection for the electronics with which the connector is used. The receptacle comprises a shell having sufficient depth to receive the male plug therein along with the replaceable EMI/RFI modules and the EMP modules for all of the signal lines and power connections for the electronics assembly. The protection modules are inserted through the front of the shell and plug into one another and into a substrate having a corresponding pattern of socket contacts.

Abstract: A pair of photodetector output signals are positioned so as to be responsive to the interference pattern produced by the pair of laser beams of the ring laser. The photodetectors are positioned such that the output signals are in phase quadrature. A second pair of signals is derived from the first pair of signals in which the second pair are displaced in phase relative to the first pair and are also in phase quadrature. The two pairs of signals are signal processed to enhance resolution of the ring laser readout.