Converter identification (recovery applied): The originally referenced figure is unavailable. Applying the recovery-first policy, consider the common block diagram that includes a comparator, a DAC, a successive-approximation register, and control logic forming a binary search loop. This architecture corresponds to which converter?

Introduction / Context:
Since the figure is missing, we reconstruct the likely intent. Many textbooks show a block diagram with four hallmark blocks: a DAC, a comparator, a successive-approximation register (SAR), and a control clock. Together, these perform a binary search to converge on the input voltage—the defining behavior of a SAR ADC.

Given Data / Assumptions:

• Blocks present: DAC, comparator, SAR register, control logic.
• Operation: iterative MSB-to-LSB decision sequence.
• Goal: identify the converter type by functional blocks.

Concept / Approach:
In each bit trial, the SAR sets a tentative bit in the internal DAC and compares the DAC output against the analog input. The comparator decides to keep or clear the bit. Repeating this for all bits yields the final digital code in roughly N steps for an N-bit result—signature of SAR conversion.

Step-by-Step Solution:
1) Set MSB in SAR → DAC outputs mid-scale.2) Comparator compares Vin vs Vdac → decision keeps/clears MSB.3) Proceed to next bit, repeating the compare-and-decide loop.4) After LSB, the SAR holds the conversion result; the architecture is SAR ADC.

Verification / Alternative check:
Contrast with dual-slope (integrator + counter timing) and tracking (up/down counter follows Vin). Only SAR shows the DAC-comparator-SAR closed loop with binary search.

Why Other Options Are Wrong:
Dual-slope uses integration and timed de-integration, not a DAC. Tracking uses a counter driving a DAC continuously, not a SAR register. “Dual-approximation D/A comparator” is not a standard converter type.

Common Pitfalls:
Confusing SAR with flash (which uses many comparators in parallel) or with ramp/tracking architectures.

Final Answer:
successive-approximation A/D converter