EE200 DIGITAL LOGIC CIRCUIT DESIGN
Class Notes
CLASS 14-2&3
The material covered in this
lecture
will be as follows:
⇒
Ripple counters.
Binary ripple counter.
BCD (Decimal) ripple counter.
After finishing this lecture, you should be able to:
⇒
Describe the operation of binary ripple counters.
⇒
Recognize the count cycle and timing diagram of
counters.
⇒
Understand the modifications required for the input
functions to transform the 4-bit binary ripple counter
to BCD ripple counter.
ipple Counters
R
here are two categories of counters:
T
Ripple counters,
Synchronous counters.
Ripple counters are counters where each flip flop is triggered by
the transition of other flip-flops. In synchronous counters all flip-
lops are triggered by the same clock pulses.
f
inary Ripple Counter
EE200(class 14-2&3)
Prof. M.M. Dawoud
136
B

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