Acronym expansion in sensors and imaging In electronics and imaging, the widely used acronym CCD stands for:

Introduction / Context:
CCD technology underpins many image sensors and precision charge-transfer circuits. Knowing the correct expansion of the acronym helps place the device’s operating principle in context.

Given Data / Assumptions:

• CCD is an established term in optics, imaging, and signal processing.
• The device moves charge packets through potential wells under clock control.

Concept / Approach:
“Charge-coupled device” describes a structure that stores and transfers discrete packets of electric charge across the substrate via capacitive coupling controlled by clocked electrodes, mapping charge to voltage at an output amplifier.

Step-by-Step Solution:
Identify domain: imaging/sensing.Recall physical mechanism: charge transfer between adjacent wells.Select correct phrase: charge-coupled device.

Verification / Alternative check:
Introductory texts and sensor datasheets consistently expand CCD as “charge-coupled device.”

Why Other Options Are Wrong:
Other expansions are not standard terms and do not describe the coupled-charge transfer mechanism.

Common Pitfalls:
Confusing CCD with CMOS active pixel sensors; both capture images but use different architectures.

Final Answer:
charge-coupled device