METHOD AND APPARATUS FOR COMPENSATING LOCAL OSCILLATOR FREQUENCY ERROR THROUGH ENVIRONMENTAL CONTROL

摘要

The frequency error of an oscillator is minimized by characterizing the operating environment of the oscillator. An electronic device monitors parameters that are determined to have an effect on the frequency accuracy o f the internal frequency source. Temperature is one parameter known to have an effect on the frequency of the internal frequency source and a primary contributor to device temperature is the RF Power Amplifier (PA). The electronic device collects and stores the activity level of the PA. The effective PA duty cycle over a predetermined period of time is calculated. T he LO operating environment is stabilized by operating the PA at the calculated duty cycle when the LO is required to operate in a high stability mode.