Hi
We have gone over CMOS 50 ohm line driving a bunch of times. Check the archives
for all
of the various opinions. A quick summary:
If you are driving CMOS, the output swing does not have to hit 99% of the
supply. You
can do a pretty good job with gates in parallel and no source termination.
Am 04.03.2018 um 03:17 schrieb David C. Partridge:
Brice said:
. Some fast CMOS devices (esp clock drivers) have an output R close to 50
ohms as they are intended to drive 50 ohm source terminated transmission
lines.
Any in particular that you'd recommend? I need to drive a 50ohm line
These devices are only suitable for driving source terminated 50 ohm
transmission lines not a 50 ohm load to ground (or even 1/2Vcc) to produce CMOS
levels at the load.
If you are driving a low pass filter or similar intending to produce a sinewave
output then its somewhat easier.
Even
Brice said:
>. Some fast CMOS devices (esp clock drivers) have an output R close to 50
ohms as they are intended to drive 50 ohm source terminated transmission
lines.
Any in particular that you'd recommend? I need to drive a 50ohm line and a
single gate inverter doesn't have the grunt to do so
