Digital Circuit Fundamentals 1 Unit 4 – 4-Bit Shift Register
Exercise 2 – Circuit Waveforms
EXERCISE OBJECTIVE
When you have completed this exercise, you will be able to relate the bit movements of a shift
register to circuit waveforms. You will verify your results by observing your circuit waveforms
on an oscilloscope.
DISCUSSION
- The LS194 is a synchronous shift register. Outputs are updated on the positive transition of
the CLOCK waveform. - CLEAR does not require a CLOCK input; all other operations of the shift register require a
minimum of one CLOCK cycle.