Abstract: A fully digital synthesizable digital controller (152, 152a) controls a switch-mode DC-DC converter (150, 230, 240, 250, 260) having switching elements (154) and an LC circuit (156, 157) for producing an output voltage (160) that is maintained at a desired level regardless of load changes that can occur on the output. The digital controller (152, 152a) comprises an input stage (164), proportional-integral-derivative (PID) compensator (170), and a digital sigma-delta modulator (172). The input stage (164) produces a difference signal between a reference voltage Vref and a feedback voltage Vfbk, and comprises (i) first and second delta-sigma-delta modulators (178, 180) and a subtractor (182), (ii) a delta-sigma-delta modulator (180) and a subtractor (182); or (iii) a comparator (218). The PID compensator (170) processes the difference signal to compensate for an undesired phase shift and to stabilize the feedback loop.

Abstract: A fully digital synthesizable digital controller (152,152a) controls a switch-mode DC-DC converter (150,230,240,250,260) having switching elements (154) and an LC circuit (156,157) for producing an output voltage (160) that is maintained at a desired level regardless of load changes that can occur on the output. The digital controller (152,152a) comprises an input stage (164), proportional-integral-derivative (PID) compensator (170), and a digital sigma-delta modulator (172). The input stage (164) produces a difference signal between a reference voltage Vref and a feedback voltage Vfbk, and comprises (i) first and second delta-sigma-delta modulators (178,180) and a subtractor (182), (ii) a delta-sigma-delta modulator (180) and a subtractor (182); or (iii) a comparator (218). The PID compensator (170) processes the difference signal to compensate for an undesired phase shift and to stabilize the feedback loop.

Abstract: An Analog-to-Digital Converter (ADC) is provided. An embodiment of the ADC includes a modified Delta modulator including a digital feedback loop, and a digital Sigma-Delta modulator configured within the feedback loop. Embodiments of the invention provide analog functionality with all the benefits of a digital design process as well as various other advantages provided by a Delta-Sigma-Delta modulator configuration.

Abstract: An Analog-to-Digital Converter (ADC) is provided. An embodiment of the ADC includes a modified Delta modulator including a digital feedback loop, and a digital Sigma-Delta modulator configured within the feedback loop. Embodiments of the invention provide analog functionality with all the benefits of a digital design process as well as various other advantages provided by a Delta-Sigma-Delta modulator configuration.