H - Electricity – 03 – B
Patent
H - Electricity
03
B
H03B 1/00 (2006.01) H03B 1/04 (2006.01) H03L 7/099 (2006.01)
Patent
CA 2299133
A phase locking oscillator (70, 80, 90, or 110) and a radio frequency oscillator (72, 82, 92, or 112) achieve reduced incidental frequency modulation by reducing a frequency-deviation-sensitivity. The frequency-deviation- sensitivity is reduced by a voltage divider (66 or 100) that reduces a frequency-control voltage, thereby decreasing the frequency-deviation-sensitivity, along with voltage spikes and other electrical noise, and thereby reducing incidental frequency modulation. The reduction in frequency-deviation sensivity also reduces a maximum frequency range of the radio frequency oscillator (72, 82, 92, or 112) for a maximum frequency-control voltage, and reduces the capture range of the phase locking oscillator (70, 80, 90, or 110). Means is provided for at least partially restoring the reduced maximum frequency range of the radio frequency oscillator (72, 82, 92, or 112) and the capture range of the phase locking oscillator (70, 80, 90, or 110). The means for restoring includes a diode (78A), a transistor (88A), a PROM (96), or a counter (118) that provide an other voltage. The means for restoring also includes means (R5 and R10) for proportionally combining the other voltage with the reduced frequency-control voltage.
Emhiser Research Limited
Smart & Biggar
LandOfFree
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