Comparators , Amplitude Comparator, Phase Comparator, Their Duality, Hall effect phase Comparator, Magneto resistivity type phase Comparator, vector product phase comparator, coincident type phase comparators: Phase splinting type, integrating type, rectifier bridge type, block spike or time bias ; circulating current amplitude comparator , phase splinting type amplitude comparator, sampling comparator, advantages of static Relay, limitation of static Relay, comparison of static and electromagnetic relays.
