Frequency synthesizer having modulation deviation correction via presteering stimulus

摘要

A frequency synthesizer 10 having a digital to analog converter (DAC) 40 and a feedback system which detects the deviation of a frequency modulated signal and aligns the detected deviation. DAC 40 provides a presteering stimulus for alignment purposes. After presteering alignment, the gain of DAC 40 is accurately set for frequency deviation because modulation is sourced from the same digital to analog converter that performs presteering.