A New High Resolution Frequency and Phase Synthesis Method based on `Flying-Adder' Architecture

Abstract

High speed electronic systems demand frequency synthesizer of high resolution, wide bandwidth and fast switching speed. The "Flying-Adder" architecture is a frequency and phase synthesis technique that is based on a VCO of multiple delay stages. This Flying-Adder is implemented in Quartus software which its result shows that the highest frequency is about 83 MHz, when VCO oscillates at 5.2 MHz. In some cases, this architecture has a barrier of inherent jitter on the output frequency. In this brief, a new method is proposed for eliminating such jitter problem. This method is caused to achieve exact phase and frequency. This design is implemented in Quartus software with EP1K30QC208-1 device from ACEX IK series. When VCO is running at 0.651-10 MHz high resolution output frequency is achieved.