Communications device with oscillator calibration and related methods

摘要

A communications device includes a housing, an antenna carried by the housing, an oscillator carried by the housing to generate a reference signal, and an RF receiver carried by the housing, and coupled to the antenna and the oscillator, the RF receiver demodulating a received signal from the antenna based upon the reference signal. The communications device also includes a GPS receiver carried by the housing to generate a calibration signal, a temperature sensor carried by the housing to generate a sensed temperature value, and a processor carried by the housing and coupled to the oscillator, the RF receiver, the GPS receiver, and the temperature sensor. The processor may enter an oscillator calibration mode based upon the sensed temperature value for selectively calibrating the oscillator based upon the calibration signal.

主权项

1. A communications device comprising:
a housing; an antenna carried by said housing; an oscillator carried by said housing and configured to generate a reference signal; a radio frequency (RF) receiver carried by said housing, and coupled to said antenna and said oscillator, said RF receiver configured to demodulate a received signal from said antenna based upon the reference signal; a global positioning system (GPS) receiver carried by said housing and configured to generate a calibration signal; a temperature sensor carried by said housing and configured to generate a sensed temperature value; and a processor carried by said housing and coupled to said oscillator, said RF receiver, said GPS receiver, and said temperature sensor, said processor configured to
enter an oscillator calibration mode based upon the sensed temperature value for selectively calibrating said oscillator based upon the calibration signal, andenter the oscillator calibration mode when a lapsed time value from a prior calibration exceeds an ageing threshold value.