COST EFFECTIVE LOW NOISE SINGLE LOOP SYNTHESIZER

摘要

A low cost low phase noise microwave synthesizer includes a DDS modulation circuit and a phase locked loop. The DDS modulation circuit modulates the output of the DDS to high frequency. The phase-locked loop downconverts the DDS output and locks the downconverted signal to a relatively low frequency, fixed reference.;A reference oscillator, a modulated DDS signal, a DDS modulation circuit, a variable frequency output signal, a phase locked loop circuit, a first input, a feedback signal, a second input, an output, a phase comparator circuit, Input, mixer circuit, microwave synthesizer.