Direct frequency synthesizer using powers of two synthesis techn

Details Direct frequency synthesizer using powers of two synthesis techn Direct frequency synthesizer using powers of two synthesis techn

1987-08-03

1989-10-31

Miller, Stanley D.

Oscillators

Relaxation oscillators

328 14, 331 40, 455260, H03B 1900, H03L 718

Patent

active

048780278

ABSTRACT:
A fast switching broadband signal synthesizer method and structure are provided which not only has the ability to change frequency and amplitude quickly, but with a minimal dwell time required before switching can again take place. A signal translator can also be constructed in accordance with this invention in order to convert the output frequency of a companion signal source to any desired frequency while retaining the fast switching speed and switching rate of the signal synthesizer. Amplitude, phase, and frequency modulation of the companion signal are preserved during the translation process. A direct frequency synthesizer is provided wherein internal signals which are combined to generate any output frequency are derived from a single fixed frequency oscillator. By utilizing a single reference frequency oscillator in accordance with this invention, the amount of circuitry required to construct a direct frequency synthesizer is greatly reduced. Because all internal signals are derived from one reference frequency oscillator, the close-in-phase noise of the internal signals are correlated, thus providing an output signal having low phase noise. All internal frequency increments and number of frequency selector switch positions have numerical values that are an exact-power-of-two.

REFERENCES:
patent: 3702441 (1972-11-01), Thrower
patent: 3838355 (1974-09-01), Papaieck
patent: 3882403 (1975-05-01), Gerken
patent: 4008443 (1977-02-01), Remy
patent: 4185247 (1980-01-01), Harrison, Jr.
patent: 4272730 (1981-06-01), Digiovanni
patent: 4425552 (1984-01-01), Stirling
patent: 4472820 (1984-09-01), Borras
Stirling, "Microwave Frequency Synthesizers", Prentice--Hall, Inc., Englewood Cliffs, N.J., 1987, pp. 44-53.
Noordanus, IEEE Trans. on Comm. Tech., "Frequency Synthesizers--A Survey of Techniques", (Apr. 1969), vol. Com--17, No. 2, pp. 257-271.
Hassun, Microwaves & RF, "The Common Denominators in Fractional N", (Jun. 1984), pp. 107-110.
Gibbs et al., Electronics, "Frequency Domain Yields its Data to Phase-Locked Synthesizer", (Apr. 27, 1978), pp. 107-113.
Rauvola, Microwave Systems News, "Advanced Frequency Synthesizer Developed for Radar and Communications Applications" (Jan. 1987), pp. 8-12.
An Advertisement of John Fluke Manufacturing Company entitled "The History of General Purpose Frequency Synthesizers" (1982).
Hosking, Electronic Products Magazine, "Frequency Synthesizers--Direct, Indirect or Direct Digital?" (Dec. 17, 1973), pp. 115-123.
Cooper, Electronic Design, "Why Complicate Frequency Syntehsis?" (Jul. 19, 1974), pp. 80-84.
Oliver, Hewlett-Packard Journal, "A 0-50 Mc Frequency Synthesizer with Excellent Stability, Fast Switching, and Fine Resolution", (May 1964), pp. 1-6.
Tykulsky, Hewlett Packard Jounral, "Digital Frequency Synthesizer Covering 0.1 MHz to 500 MHz in 0.1 Hz Steps" (Oct. 1967), pp. 10-16.
Oropeza et al., Frequency, "Binary Frequency Synthesis: Spectral Purity with Economic Simplicity", (Sep./Oct. 1966).
Feinberg, r.f. design, "Multiple Synthesis Techniques Optimize Instrument's Performance" (May/Jun. 1984), pp. 21-41.
Gilette, Communications Designer's Digest, "VLF Output, Low Noise Phase Noise Make Synthesizer Attractive Test Tool", (Aug. 1969), pp. 46-49.
Rhode et al., r.f. design, "Low-Noise Frequency Synthesizers Using Fractional N Phase-Locked Loops", (Jan./Feb. 1981), pp. 20-34.
Fogarty, Computer Design, "Digital Synthesizers Produce Wide Frequency Range from Single Source", (Jul. 1975), pages 100 et seq.
Papaieck, Microwave Journal, "A Submicrosecond Switching Frequency Synthesizer to 4 GHz" (Dec. 1985), pp. 133-136.
Fast Switching Microwave Frequency Synthesizer, R. C. Stirling.

Affiliated with

Also associated with

Rating

Direct frequency synthesizer using powers of two synthesis techn does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct frequency synthesizer using powers of two synthesis techn, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct frequency synthesizer using powers of two synthesis techn will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-628010