Frequency synthesizer with temperature compensation and frequency multiplication and method of providing the same

The frequency synthesizer with temperature compensation and frequency multiplication, comprising:

• a temperature dependent frequency oscillator;
• at least one multi-modulus frequency divider, the divider programmed to vary as a function of a temperature variation of the frequency oscillator and to vary as a function of a frequency multiplication factor;
• at least one phase locked loop including a phase detector being coupled to a loop filter which is coupled to a voltage controlled oscillator having an output, the output being coupled back to a first input of the phase detector through at least one feedback path, the oscillator being coupled to a second input of the phase detector through at least one signal path;
• a control circuit including a temperature sensor and a memory being coupled to a temperature compensation controller, the controller of the control circuit being coupled to the divider and for controlling the divider;
• and
• the divider being coupled to the phase locked loop such that a temperature independent multiplied output frequency is obtained.

A method of temperature compensating and multiplying a frequency output in a frequency synthesizer, comprising the steps of:

• providing a temperature dependent frequency oscillator coupled to at least one frequency multiplication element being programmed to vary as a function of a temperature variation of the frequency oscillator and to vary as a function of a frequency multiplication factor;
• measuring an ambient temperature value in proximity to the oscillator;
• searching a lookup table for a predetermined temperature dependent control signal corresponding to the ambient temperature value and the frequency multiplication factor;
• and
• applying the control signal to the at least one frequency multiplication element such that a desired temperature compensated and multiplied output frequency is obtained from the synthesizer.