Patent ID: 7184461
Filing Date: 2007-02-27
Classification: G01S,H04B

Abstract:
1. An apparatus comprising: a control circuit to generate a channel enable signal based on control information from a processor at a first clock signal having a first clock frequency, the channel enable signal selecting a channel for a satellite in a global positioning system (GPS), the channel operating at a coarse/acquisition (C/A) clock signal having a second clock frequency, the control information including at least one of channel select information, an initial count, an increment value, and PN command; an increment register to store the increment value for the selected channel at the first clock signal; and an accumulator coupled to the increment register and the control circuit to generate a PN clock signal using the increment value; wherein the control circuit comprises: a decoder to decode the channel select information, the decoded channel select information providing the channel enable signal; a channel enable register coupled to the decoder to store the channel enable signal at the first clock signal; a counter coupled to the channel enable register to update a count from the initial count at the first clock signal, the counter generating a terminal signal when the count reaches a terminal count; and a logic circuit coupled to the counter and the channel enable register to generate a load signal from the PN command to load the initial count to the counter and a reset signal from the terminal signal to reset the channel enable register.