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
has two stable states
has one energy storage element
switches between its two states automatically
triggered oscillator
crystal oscillator
free running oscillator
saw-tooth wave generator