Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2007-11-27
2007-11-27
Mis, David (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S017000, C331S044000, C331SDIG002
Reexamination Certificate
active
11368627
ABSTRACT:
A method and a system for calibrating an input voltage of a voltage controlled oscillator and a digital interface used for calibrating the input voltage. The method includes: setting a lock detection time for tuning a signal phase; setting a lock detection voltage section; setting output frequency values at predetermine spacings; checking connection states of capacitors of the capacitor bank necessary for a lock of the output frequency values; storing information regarding the connection states of the capacitors in the output frequency values; and if one of the output frequency values is determined depending on a change of a channel, setting connection states of the capacitors according to the information regarding the connection state corresponding to the one frequency value. The capacitor bank includes: a predetermined number of capacitors having different capacitances and connected to one another in parallel; and switches connected to the capacitors in series.
REFERENCES:
patent: 4410860 (1983-10-01), Kipp et al.
patent: 6308055 (2001-10-01), Welland et al.
patent: 1998-026040 (1998-07-01), None
Bang Hee-mun
Jeon Sang-yoon
Jung Sung-jae
Kim Chong-ouk
Kim Dae-ki
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