HI all, I need to build a few distribution amplifiers (>90% for 10MHz, sometimes maybe 5MHz) and instead of reinventing the wheel I decided to try to modernize the TADD-1 into an all (almost) SMD design. Here are some draft sketches: http://www.anderswallin.net/2015/11/frequency-distribution-amplifier-plans-a-k-a-smd-tadd-1/
Does this sound/look reasonable or crazy? Any suggestions for op-amps to try and/or compare to the AD8055? What causes the extra phase-noise below 1 Hz offset in John A's result: https://www.febo.com/pages/amplifier_phase_noise/amplifier_phase_noise.png Suggestions for a low noise DC-regulator circuit? The 12-24VDC supplied to this board will most likely come from a switched-mode PSU, so filtering of common-mode noise is mandatory. I found the TI LP38798 shown in the schematic by googling - if someone has a proven a measured design that would be a safer choice. In any case more filtering (e.g. ferriites) is probably a good idea. This design will be available on my blog or on github when it is done - if anyone is interested. Thanks, Anders _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
