Notes:
Using
two
gates
from a
CMOS
4011
NAND
chip, a
simple
square
wave
oscillator
can be
made.
Alternatively
a CMOS
4001
chip can
also be
used, or
a TTL
equivalent.
In this
circuit
the mark
space
ratio
can also
be
independently
controlled
by
varying
the
value of
the
resistors.
The rise
and fall
times of
the
output
pulses
depend
on the
operating
voltage
of the
IC and
type of
IC, but
will be
typically
in
the
order on
tens of
nanoseconds. |
