Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular error voltage control
Reexamination Certificate
2006-07-31
2008-10-14
Pascal, Robert J. (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular error voltage control
C331S011000, C331S016000, C327S157000
Reexamination Certificate
active
07436264
ABSTRACT:
A charge supplying apparatus in a frequency synthesizer includes first and second charge supply units. The first charge supply unit is activated for generating a first voltage coupled to a loop filter, and the second charge supply unit is activated for generating a second voltage coupled to the loop filter. A control unit has a mode determining unit that activates one of the first and second charge supply units from comparing a reference frequency with an output frequency. The mode determining unit also generates at least one control signal for adjusting the first voltage by binary increments for decreasing a difference between the reference and output frequencies.
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Choi Monica H.
Gannon Levi
Pascal Robert J.
Samsung Electronics Co,. Ltd.
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