The two oscillator circuits down below are appropriate for using crystal oscillators in sequence or parallel mode: Superior-repetition-price and substantial-power picosecond regenerative amplifier depending on only one bulk Nd:GdVO4 crystal A timing reference incorporating just one-crystal-silicon micromechanical resonator with an outstanding variable of bigger than a million and also a https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html