Assertion (logic design): “A popular waveform generator is the Johnson shift counter.” Select the most appropriate evaluation.

Introduction / Context:This statement mixes up roles. Johnson (twisted-ring) counters generate sequences of states and are excellent for timing/sequence generation, but the commonly cited popular general-purpose waveform generator in basic electronics is the 555 timer or function generator ICs.

Given Data / Assumptions:

• “Popular waveform generator” generally means a device used to create analog waveforms like square/triangle/sawtooth.
• Johnson counter is a digital sequential circuit.

Concept / Approach:Johnson counters circulate a pattern through flip-flops to produce non-overlapping timing signals. They are not standard analog waveform generator ICs. Thus the claim is not correct in the usual sense taught at this level.

Step-by-Step Solution:

Verification / Alternative check:Compare typical lab instruments/ICs: 555 timer, XR2206, ICL8038, or DDS devices are taught as waveform generators, not Johnson counters.

Why Other Options Are Wrong:

Common Pitfalls:Assuming any periodic digital sequence source is a “waveform generator.” The term is broader and usually analog-focused at this level.

Final Answer:Incorrect