Phase shifting means
Phase switching circuit
Phase synchronization system with start-up sequencing and...
Phase-controlled oscillator circuit
Phase-locked loop with d.c. modulation capability
Phase-locked loop with redundant reference input
Photo switching device
Photocell activated switch for use with seven ways connector
Photochromic light valve
Photocoupler device
Photocoupling line isolation circuit
Photoelectric rotational direction sensor
Photoresponsive current limiting switching circuit
Photosensitive semiconductor device
Physical layers
Physiological measurement display system
Piezoelectric acoustic surface wave device
Piezoelectric electronic switch
Piezoelectric element for keyboards
Piezoelectric key