초록 ▼

A frequency calibration circuit for use in a spread spectrum receiver. The receiver includes circuitry for receiving a spread spectrum signal from a base station and for recovering a network clock signal therefrom, a low frequency oscillator for producing an oscillator clock signal, and a frequency

A frequency calibration circuit for use in a spread spectrum receiver. The receiver includes circuitry for receiving a spread spectrum signal from a base station and for recovering a network clock signal therefrom, a low frequency oscillator for producing an oscillator clock signal, and a frequency comparator that takes as inputs the network clock signal and the oscillator clock signal and produces a calibration factor based on the difference between the clock signals. A controller coupled to the low frequency oscillator amd the frequency comparator utilizes the calibration factor together with the low frequency oscillator clock signal to output a accurate and precision timed signal thereby being able to accurately require the timing of the paging channel.

대표청구항 ▼

[ I claim:] [1.] A receiver for use in a communication system having a transmitter for transmitting a spread-spectrum signal, said receiver comprising:receiver means for receiving said spread spectrum signal and for recovering a network clock signal therefrom;an oscilator for producing an oscillator

[ I claim:] [1.] A receiver for use in a communication system having a transmitter for transmitting a spread-spectrum signal, said receiver comprising:receiver means for receiving said spread spectrum signal and for recovering a network clock signal therefrom;an oscilator for producing an oscillator clock signal;frequency comparator means coupled to said receiver means and said oscillator for receiving said network clock signal and said oscillator clock signal and for producing a calibration factor based on a comparison of the network clock signal and said oscillator clock signal;a controller coupled to said oscilator and said frequency comparator means for outputting a wake-up signal based on said calibration factor.