A new frequency source based on Sigma Delta and CORDIC

Author

Shi, Dongyuan ; He, Zishu

Author_Institution

Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2012

fDate

21-23 April 2012

Firstpage

2288

Lastpage

2291

Abstract

Direct Digital Synthesizer has become the first choice for the signal generator in modern electronic devices. But the spur prevents it from replacing traditional frequency synthesizer completely. This paper introduces a new frequency source, conjoining Sigma Delta and CORDIC, to produce high-resolution and low spur analog wave-forms. With phase noise as low as -107dBc/Hz, the generated sine waveforms at MF and HF show the better performances than those produced by general analog signal generator. Furthermore, It does not require a ROM, a multiplier or DAC, easily realized in FPGA(S), CPLD or ASIC.

Keywords

digital arithmetic; direct digital synthesis; phase noise; sigma-delta modulation; waveform generators; ASIC; CORDIC; CPLD; FPGA; HF sine waveform generation; MF sine waveform generation; direct digital synthesizer; electronic devices; frequency source; high-resolution analog waveforms; low spur analog waveforms; phase noise; sigma delta; signal generator; sine waveform generator; Modulation; Phase noise; Sigma delta modulation; Signal generators; Transfer functions; Vectors; CORDIC; Sigma Detla; frequency source;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics, Communications and Networks (CECNet), 2012 2nd International Conference on

Conference_Location

Yichang

Print_ISBN

978-1-4577-1414-6

Type

conf

DOI

10.1109/CECNet.2012.6201925

Filename

6201925