Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular error voltage control
Patent
1992-11-16
1996-03-12
Lee, Benny
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular error voltage control
331 1A, 331 14, 331 25, 375376, 327141, 327156, 455260, 455266, H04B 140, H03L 700
Patent
active
054989981
ABSTRACT:
Adjustment of the output frequency of a frequency synthesizer can be optimized in the following manner. Once a frequency adjustment request is detected, which indicates a selected frequency, a frequency difference is calculated between the selected frequency and the present frequency. A frequency scaling factor is then determined. Once the frequency difference and the frequency scaling factor are determined, a frequency adjustment time is calculated based on a proportional relationship between the frequency difference and the frequency scaling factor. The bandwidth of a multi-bandwidth filter is adjusted to a second bandwidth for the duration of the calculated frequency adjustment time. The output frequency of the frequency synthesizer is adjusted from the present frequency to the selected frequency prior to the expiration of the frequency adjustment time. Upon expiration of the frequency adjustment time, the bandwidth of the multi-bandwidth filter is adjusted from the second bandwidth to the first bandwidth.
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Gehrke James K.
Sarocka Robert J.
Karim Nedra D.
Kinkead Arnold
Lee Benny
Lukasik Susan L.
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