Method and System for Sharing a Clock Reference Signal within an Integrated Mobile Device
First Claim
Patent Images
1. A method of sharing a clock reference signal of an oscillator that is input to a GPS system and a modem system within an integrated mobile device, the method comprising:
- receiving an input signal at the modem system;
comparing the input signal with the clock reference signal at the modem system to define a frequency error signal;
altering a voltage of an input signal at the oscillator by the GPS system based upon the frequency error signal such that a frequency of the clock reference signal is altered to synchronize the modem system with a corresponding network; and
altering a value to be added to the clock reference signal such that the GPS system remains in a locked state.
5 Assignments
0 Petitions
Accused Products
Abstract
A method and system of a GPS system controlling a voltage of an input signal to an oscillator, the oscillator producing a clock reference signal to the GPS system and a modem system, such that a frequency of the clock reference signal is altered to synchronize the modem system with a corresponding network while the GPS system remains in a locked state.
-
Citations
21 Claims
-
1. A method of sharing a clock reference signal of an oscillator that is input to a GPS system and a modem system within an integrated mobile device, the method comprising:
-
receiving an input signal at the modem system; comparing the input signal with the clock reference signal at the modem system to define a frequency error signal; altering a voltage of an input signal at the oscillator by the GPS system based upon the frequency error signal such that a frequency of the clock reference signal is altered to synchronize the modem system with a corresponding network; and altering a value to be added to the clock reference signal such that the GPS system remains in a locked state. - View Dependent Claims (2, 3, 4, 5)
-
-
6. An integrated mobile device for sharing a clock reference signal, the system comprising:
-
an oscillator to generate the clock reference signal; a modem system comprising; a radio frequency (RF) processor to receive the clock reference signal; an antenna to receive an input signal; a digital signal processor (DSP) configured to compare the input signal received by the antenna with the clock reference signal to define a frequency error signal; a GPS system comprising; a GPS radio frequency (RF) processor to receive the clock reference signal; a frequency compensation unit to receive the frequency error signal and alter a voltage of an input signal to the oscillator based upon the frequency error signal such that a frequency of the clock reference signal is altered to synchronize the modem system with a corresponding network; and a carrier numerically controlled oscillator in communication with the frequency compensation unit to add a value to the clock reference signal such that the GPS system remains in a locked state. - View Dependent Claims (7, 8, 9, 10, 11, 12)
-
-
13. A method of sharing a clock reference signal of an oscillator that is input to a GPS system and a modem system, both within an integrated mobile device, the method comprising:
-
receiving an input signal by the modem system; comparing the input signal with the clock reference signal by the modem system, defining a frequency error signal; converting the frequency error signal to a digital value; communicating the frequency error signal to the GPS system; altering a voltage of an input signal to the oscillator by the GPS system via a digital to analog convertor (DAC) based upon the frequency error signal such that a frequency of the clock reference signal is altered to synchronize the modem system with a corresponding network; converting the clock reference signal to a digital value; and adding a value to the clock reference signal such that the GPS system remains in a locked state. - View Dependent Claims (14, 15)
-
-
16. A mobile device comprising:
-
a modem system; a GPS system; and a single oscillator that is shared between the modem system and the GPS system and that is controlled by the GPS system. - View Dependent Claims (17, 18, 19, 20, 21)
-
Specification