Abstract
A novel indirect frequency synthesizer (FS) circuit comprising a multiplexer (MUX) controlled ring oscillator (RO) and a Hogge phase detector has been proposed. The circuit will synthesize signals having better spectral purity and will consume less power compared to conventional indirect FS circuits. The MUX controlled RO will provide higher flexibility in frequency control and the voltage controlled oscillator (VCO) sensitivity can be varied easily to keep loop gain fixed for different values of synthesized signal frequencies. Hardware experimental results have been given to establish theoretical anticipations.
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