Delta-Sigma Modulator Timing to Prevent Feedback Factor Loss

The patent implements dynamic control of capacitor connections by using control signals to switch between different operational modes. The sampling capacitor and DAC capacitor are dynamically connected or disconnected based on the operational phase, ensuring that their holding periods do not overlap. This dynamic switching mechanism allows the system to maintain high feedback factor and amplifier gain during critical periods while simplifying operation during other periods.

The patent employs periodic action by dividing the operational cycle into distinct phases where the sampling capacitor and DAC capacitor operate in alternating periods. The holding periods are structured to be non-overlapping within each cycle, with the sampling capacitor holding during the sampling phase and the DAC capacitor holding during the DAC phase. This periodic separation ensures that the feedback factor remains high while maintaining manageable circuit operation.

The patent uses feedback mechanisms where the quantization result from the previous cycle influences the control signals for the current cycle. The control circuit generates phase control signals based on the quantization results, creating a feedback loop that automatically coordinates the holding periods of the sampling and DAC capacitors. This feedback-based control ensures non-overlapping holding periods while keeping the control logic systematic and manageable.

The control circuit is designed to automatically generate the necessary control signals based on the quantization results and operational phase, without requiring external intervention. The system self-regulates the holding periods of both capacitors through internal logic that ensures non-overlapping operation. This self-service capability reduces the need for complex external control mechanisms while maintaining high calculation accuracy.