Time-Division Delta-Sigma Modulator for Mixed DC and AC Inputs

The patent applies universality by designing a single delta-sigma modulator that can process both DC and AC analog signals through the same core modulation circuit. The multiplexer enables the system to accept different signal types (DC or AC) and route them to the universal modulation circuit, which handles both types using the same integrator and quantizer architecture, thus achieving multi-functionality without requiring separate processing paths for different signal forms.

The patent uses a multiplexer as an intermediary component that mediates between the input signals (DC or AC) and the modulation circuit. The multiplexer selects and routes the appropriate input signal to the modulation circuit in a time-division manner, enabling the core modulation circuit to process different signal types without direct modification, thus serving as a mediator that facilitates versatility while maintaining structural simplicity.

The patent merges the processing paths for DC and AC signals into a single unified modulation circuit. Instead of having separate processing chains, the design combines both signal types into one path using a multiplexer that time-division multiplexes the inputs. The same integrator, quantizer, and feedback circuit process both DC and AC signals, thereby reducing the number of processing paths while maintaining full processing capability for different electrical forms.

The patent employs periodic action through time-division multiplexing in the multiplexer, which periodically switches between DC and AC input signals in a cyclic manner. This periodic switching allows the single modulation circuit to sequentially process different signal types, achieving the effect of multiple processing paths through time-based separation rather than spatial separation, thus reducing hardware complexity while maintaining versatility.