A non-binary direct digital synthesizer with an extended phase accumulator.

Area of Science:

• Electrical Engineering
• Signal Processing
• Digital Systems

Background:

• Conventional direct digital synthesizers (DDS) often have limitations in output tuning resolution.
• Standard DDS architectures utilize normal phase accumulators with fixed denominators, restricting frequency precision.

Purpose of the Study:

• To introduce a novel direct digital synthesizer (DDS) architecture with enhanced output tuning resolution.
• To present an extended phase accumulator (EPA) design for flexible frequency control in DDS.
• To demonstrate the capability of the new DDS to generate jitter-free signals with arbitrary fractional frequencies.

Main Methods:

• Development of a new direct digital synthesizer (DDS) incorporating an extended phase accumulator (EPA).
• Implementation of two frequency control words to manage wave number and cycle length within the EPA.
• Design allows for arbitrary fractional frequency expressions, unlike conventional DDS.

Main Results:

• The extended phase accumulator (EPA) successfully enabled flexible output tuning resolution.
• Experimental validation confirmed the EPA's effective operation in controlling DDS output frequencies.
• The new DDS design provides jitter-free signals with arbitrary fractional frequency outputs.

Conclusions:

• The novel DDS with an extended phase accumulator (EPA) offers superior and flexible output tuning resolution.
• This design overcomes the fixed denominator limitation of conventional DDS, allowing for arbitrary fractional frequency generation.
• The EPA-based DDS is a significant advancement for applications requiring precise and adaptable signal generation.