[time-nuts] Digital Mixing with a BeagleBone Black and D Flip Flop

Bob Camp kb8tq at n1k.org
Thu Oct 16 17:26:46 EDT 2014


Well, been there / done that in this case. The 100EP noise floor is nothing exciting. It’s 1/F corner isn’t very impressive either. 


On Oct 16, 2014, at 12:23 PM, Gerhard Hoffmann <dk4xp at arcor.de> wrote:

> Am 16.10.2014 um 02:02 schrieb Bert Kehren via time-nuts:
>> Take a look at Potato chips yes Potato I have used them with good  results
>>   Bert Kehren
>>  330551715157
> They don't impress me much. Yes, they can drive my 0.6pF active probes without a
> problem, but connecting just one of their own inputs to an output slows it down
> to half speed. The word "line driver" for their '125 seems somewhat optimistic.
> Propagation delay vs. load capacitance could be a problem with them.
>> In a message dated 10/15/2014 6:44:47 P.M. Eastern Daylight Time,
>> kb8tq at n1k.org writes:
>> Hi
>> Most ECL families have more trouble with 1/F noise than  fast silicon
>> saturated logic. That makes them poor candidates for this sort of  thing.
> Motorola's Mosaic3 process was really ugly, and with PECL you get all the VCC noise
> unattenuated to the output in the high state. But is is seldom that MOSFETs outdo
> bipolars wrt 1/f corners. I think I'll give the 100EP a try.
> Gerhard
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