Abstract :
A monolithic digital frequency synthesizer circuit in p-channel MOS enhancement-depletion-mode technology is presented, consisting of a Phase Comparator, an 8-fold switchable 6,5 MHz divider for the reference frequency and a 2,5 MHz synchronous divider, fully programmable between 21 and 29, for the synthesized frequency, which can be chosen between 500 Hz and 500 MHz.