Novel on-chip sine wave generator

Abstract

This paper describes digital circuit which produce sigma-delta modulated sine waveform. The circuit should be used for measurements, calibrations and reference purposes. The sine waveform is generated using a novel algorithm which results from simple method used to generate sine signal in analogue circuits. The circuit is designed as fully digital and described in VHDL language. The structure of the circuit was implemented and tested in an FPGA chip. Presently the design is being transferred into ASIC utilizing AMIS CMOS 07 technology. After fabrication and testing, some changes and improvements will be done to expand functions and utilization of the generator.