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