Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2007-11-20
2007-11-20
Urban, Edward F. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S556100, C342S357490
Reexamination Certificate
active
10718821
ABSTRACT:
In a mobile communication device, a method for compensating for a frequency adjustment in an oscillator shared between a communication circuit and a positioning signal receiver is provided. In one embodiment, a method for determining the operating frequency of an oscillator detects a beginning time point of a reference signal received by the mobile communication device and enables a counter to count in step with a clock signal derived from the oscillator. When an ending time point of the reference signal is received by the mobile communication device, the count is stopped, and the frequency of the oscillator is determined based on the count in the counter and an expected time that elapsed between the beginning time point and the ending time point.
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Bharti Piyush
Bloebaum L. Scott
Chung Sherk
Mann Wallace
Roy Benjamin Van
Hallman Jonathan W.
Haroon Adeel
MacPherson Kwok & Chen & Heid LLP
SiRF Technology Inc.
Urban Edward F.
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