Dual tunable direct digital synthesizer with a frequency program

Details Dual tunable direct digital synthesizer with a frequency program Dual tunable direct digital synthesizer with a frequency program

1997-07-17

1999-04-27

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synthesizer

327106, 327113, 327116, 327119, 364718, 364721, H03L 718, H03B 2100

Patent

active

058983252

ABSTRACT:
A dual-tunable direct digital synthesizer is provided with a programmable frequency multiplier that multiplies a relatively low frequency fixed clock signal F.sub.clk so that the output frequency F.sub.o of the waveform is:

REFERENCES:
patent: 5045817 (1991-09-01), Sheffer
"AN-237 Application Note", Analog Devices Brochure, 1992, pp. 1-11.
V. Manassevitsch, Frequency Synthesizers Theory and Design, Wiley Interscience 3.sup.rd Edition, 1987, pp. 31-33.
"CMOS, 125 MHz Complete DDS Synthesizer AD9850", Analog Devices Brochure, Dec. 1995, pp. 1-19.
"Radio Frequency Oscillators and Synethesizers", ARRL Handbook, American Radio Relay League, Chapter 10, 1993, pp. 10-17 though 10-23.
V. Manassevitsch, Frequency Synthesizers Theory and Design, Wiley Interscience 3.sup.rd Edition, 1987, pp. 37-43.
Behzad Razavi, "Design of Monolithic Phase-Locked Loops and Clock Recovery Circuits -A Tutorial", IEEE Press, 1996, pp. 1-7.
Garvey et al., "An Exact Spectral Analysis of a Number Controlled Oscillator Based Synthesizer", Forty-Fourth Annual Symposium on Frequency Control, 1990, pp. 511-521.

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