Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Reexamination Certificate
2007-04-03
2007-04-03
Gesesse, Tilahun (Department: 2618)
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
C455S260000, C455S147000, C331S03600C
Reexamination Certificate
active
11318277
ABSTRACT:
Frequency modification circuitry may be employed as part of a crystal oscillator circuit to generate a reference signal with adjustable frequency. The frequency modification circuitry may be implemented as part of a crystal oscillator circuit that includes digitally controlled crystal oscillator (“DCXO”) circuitry and a crystal. The frequency modification circuitry may adjust the frequency of the reference signal in response to one or more frequency control signals. In one example, the frequency modification circuitry may include variable capacitors such as one or more continuously variable and/or discretely variable capacitors for providing coarse and/or fine adjustment of the reference signal frequency.
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pat
Lim Lysander
Maligeorgos James
Gesesse Tilahun
O'Keefe Egan & Peterman, LLP
Silicon Laboratories
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