Ultra low noise frequency generator producing the sum of plural

Details Ultra low noise frequency generator producing the sum of plural Ultra low noise frequency generator producing the sum of plural

1995-06-07

1997-04-29

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 25, 331 31, 331 38, 331 41, 331 56, 331 77, H03L 707

Patent

active

056253249

ABSTRACT:
The frequencies of N oscillators are summed to provide a signal generator output signal. Because the phase noise power spectral densities of the oscillators add as power, the frequency summed output exhibits a noise degradation over a single oscillator of only 10 log(N). The signal generator is implemented to assure independence of the oscillator noise contributions, with phase locking the oscillators to a common frequency for ease of spurious signal control.

REFERENCES:
patent: 2756331 (1956-07-01), Foster et al.
patent: 5373265 (1994-12-01), Davis et al.
patent: 5408201 (1995-04-01), Uriya
patent: 5422604 (1995-06-01), Jokura

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