[time-nuts] Digital Mixing with a BeagleBone Black and D Flip Flop
Bob Camp
kb8tq at n1k.org
Wed Oct 15 22:27:10 EDT 2014
Hi
Is it silicon or is it something more exotic? In general, exotic is not good for 1/F noise.
Bob
On Oct 15, 2014, at 9:36 PM, Daniel Mendes <dmendesf at gmail.com> wrote:
>
> You beat me :)
>
> http://www.potatosemi.com/
>
> They sell low quantities thru Ebay, like this:
>
> http://www.ebay.com/itm/7400-G-Series-GHz-TTL-CMOS-logic-IC-14pin-SOIC-QTY-1-/330772425575?pt=LH_DefaultDomain_0&hash=item4d0392ab67
>
> Daniel
>
> On 15/10/2014 21:02, Bert Kehren via time-nuts wrote:
>> Take a look at Potato chips yes Potato I have used them with good results
>> Bert Kehren
>> 330551715157
>> 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.
>>
>> Bob
>>
>> On Oct 15, 2014, at 9:13 AM, Gerhard Hoffmann <dk4xp at arcor.de> wrote:
>>
>>> Am 15.10.2014 um 11:29 schrieb Bruce Griffiths:
>>>> Typically a 74HC164 shift register has internal cycle to cycle sampling
>> jitter of about 4ps or so when used as a mixer, a 74AC device has about
>> 1/4 of this jitter or around 1ps. Faster CMOS devices have even less internal
>> jitter.
>>> Hi,
>>> do you have any data on MC100EP51 & friends? In the datasheet they seem
>> to claim
>>> sth. in the low ps also, which would be disappointing in comparison to
>> 74AC or 74LVC
>>> regards, Gerhard
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