Title :
A 100-MHz, 16-b, direct digital frequency synthesizer with a 100-dBc spurious-free dynamic range
Author :
Madisetti, Avanindra ; Kwentus, Alan Y. ; Willson, Alan N., Jr.
Author_Institution :
Broadcom Corp., Irvine, CA, USA
fDate :
8/1/1999 12:00:00 AM
Abstract :
This paper describes the architecture and the IC implementation of a direct digital frequency synthesizer (DDFS) that is based on an angle rotation algorithm (similar to CORDIC). It is shown that the architecture can be implemented as a multiplierless, feedforward, and easily pipelineable datapath. A prototype IC has been designed, fabricated in 1.0-μm CMOS, and tested. The IC produces 16-b sine and cosine outputs with a spurious-free dynamic range of more than 100 dBc. A 36-b frequency control word gives a tuning resolution of 0.0015 Hz at a 100-MHz sampling rate
Keywords :
CMOS digital integrated circuits; direct digital synthesis; 1.0 micron; 100 MHz; 16 bit; CMOS IC; angle rotation algorithm; direct digital frequency synthesizer; dynamic range; CMOS integrated circuits; Digital integrated circuits; Dynamic range; Frequency control; Frequency synthesizers; Integrated circuit synthesis; Integrated circuit testing; Prototypes; Sampling methods; Tuning;
Journal_Title :
Solid-State Circuits, IEEE Journal of
