In a message dated 4/10/2007 14:33:17 Pacific Daylight Time, [EMAIL PROTECTED] writes:
Yes ground bounce can play havoc with the effective switching thresholds. One would expect this effect to be much worse with single ended clocks. Bruce Hi Bruce, not to give away too much, but in our Jackson-Labs Fury GPSDO we compensate for VDD bounce as well by having fully-differential circuits with special current balancing circuitry. Thus not only do clocks have to be differential, but every output of the circuit should be differential as well to balance the VDD currents. This helps prevent feeding noise into the VDD rails, which can show up at other IC's. We were able to completely get rid of spurs in our phase noise measurements with this technique. bye, Said ************************************** See what's free at http://www.aol.com. _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
