Tom might have started this as I was playing around with PICDIV and had asked him the best conditioning circuit. Turned out I had all the parts to copy the TADD-2 including the mini circuits transformer so that’s what I did. It works well, pretty sensitive, etc. I’ve also used the bias trick with a TTL or CMOS buffer when I needed to convert SPIDF signals to baseband for driving an optical connection.
Now that I had the input conditioned, I need to drive a 50ohm load with the signal coming from the PICDIV. Can someone point me at a circuit using transistors and 10V if possible? I am trying to duplicate one channel of the TADD2 so I can bring 10Mhz down to 10Khz. Thanks Jerry > On Jan 20, 2018, at 11:21 AM, Poul-Henning Kamp <[email protected]> wrote: > > -------- > In message <[email protected]>, jimlux > writes: > >>> I played with that, I used a small transformer to balance the signal >>> and then into LVDS receiver through a voltage divider. Worked well, >>> but I didn't measure the jitter, it was just for a micro-controller. >> >> You can also do it with capacitive dc block to one side, and some >> resistors - the ap notes describe it. The receivers are a fairly high Z >> input, so you pick the voltage divider resistors to make the termination >> resistance right for the incoming signal. > > Yes, but that doesn't give you galvanic isolation, which I think is almost > mandatory unless it is a metrology situation. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > [email protected] | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > 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. _______________________________________________ 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.
