Frequency synthesizer including a fractional multiplier

Details Frequency synthesizer including a fractional multiplier Frequency synthesizer including a fractional multiplier

1981-12-02

1984-07-03

Ruggiero, Joseph F.

Boots, shoes, and leggings

307529, 328 14, 331 2, 364703, 364841, G06G 726

Patent

active

044583290

ABSTRACT:
A synthesizer comprises a basic synthesizer (1) generating a frequency Fo+.xi., wherein .xi. can be varied by small incremental steps, and a phase-locking loop (including a divider 2, a comparator 3, a filter 6, a mixer 4) setting the frequency of an intermediate oscillator (5) to a value Fi=(Fo+.xi.)/(NR+M), wherein NR+M is the division rate of divider 2. A fractional multiplier including an output oscillator 8, a mixer 9, harmonic generators 7 to 12, a divider 13 and a phase comparator 11 multiplies intermediate oscillator frequency Fi by N+(M/R), wherein R preferably is 5. The synthesizer can be used to synthesize frequencies up to several gigahertz.

REFERENCES:
patent: 3319178 (1967-05-01), Broadhead, Jr.
patent: 3427561 (1969-02-01), Hamer
patent: 3694766 (1972-09-01), Boelke
patent: 4086544 (1978-04-01), Fried
patent: 4225829 (1980-09-01), Kumagai
patent: 4234929 (1980-11-01), Riley, Jr.
patent: 4320355 (1982-03-01), Kawagoe et al.

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