Communication device with a frequency compensating synthesizer and method of providing same

A radio communication device, comprising:

• a partially compensated crystal oscillator having an output frequency;
• a plurality of frequency synthesizers generating local oscillator signals, each frequency synthesizer having a reference frequency input;
• at least one of the frequency synthesizers being a partially frequency compensating synthesizer, a frequency multiplication factor of the partially frequency compensating synthesizer being programmed to vary as a function of at least one of the group consisting of a temperature variation of the crystal oscillator output frequency and a frequency compensation signal from an AFC circuit of the radio;
• the crystal oscillator being coupled to the at least one frequency synthesizer, wherein the at least one frequency synthesizer multiplies and partially compensates the partially compensated crystal oscillator output frequency such that a substantially compensated frequency is provided;
• a control circuit including a temperature sensor and a memory being coupled to a temperature and frequency compensation controller, the controller of the control circuit being coupled to the crystal oscillator and the at least one frequency synthesizer, the controller being responsive to a temperature signal from the temperature sensor and the frequency compensation signal from the AFC circuit of the radio;
• and
• the control circuit couples a first partially compensating signal to the crystal oscillator to provide a fine resolution, and wherein the control circuit couples a second partially compensating signal to the at least one frequency synthesizer to program a frequency multiplying factor of the frequency compensating synthesizer to provide a coarse resolution, the partially compensating signals each providing at least one of the group consisting of a temperature compensation of the oscillator frequency and a frequency compensation signal from an AFC circuit of the radio;
• the substantially compensated frequency of the at least one frequency synthesizer being applied as a reference frequency to at least one reference frequency input of the remaining frequency synthesizers.