Colpitts

Armstrong

Phase shift

Crystal

400 kHz

600 kHz

1000 kHz

1600 kHz

a stable state

two quasi stable states

an oscillator

none of these

in counting circuits

in memory and timing circuits

for regeneration of distorted waves

for generating square waveforms

has no stable state

returns to its stable state automatically

has no energy storage component

is frequently used in counting circuits