Re: [SI-LIST] : Ground gap problem

John Lockwood (johnl@juniper.net)
Wed, 24 Mar 1999 09:51:32 -0800

If you can't find a Motorola MECL System Design Handbook take a look at
HP's App Note 1304-1, Evaluating Microstrip with Time Domain Reflectometry,
which you can find at:

http://www.tmo.hp.com/tmo/Notes/English/5968-0007E.html

John

At 07:42 AM 3/24/99 -0800, you wrote:
>John,
>
>What version of the Motorola handbook you have? I have a 96 version and I
>couldn't finder those finures.
>
>At 05:26 PM 3/23/99 -0800, John Lockwood wrote:
>>
>> Sangil,
>>
>> Motorola's MECL System Design Handbook has a few TDR plots which show the
>> effects of cutting ground under traces. See figures 7-11 on page 137 and
7-13
>> on page 139.
>>
>> At 02:09 PM 3/23/99 -0800, you wrote:
>> >>>>
>>>
>>> Hi all,
>>> I am trying to find the effects of the gaps on the ground plane for the
>>> high-speed circuits.
>>> Even though I have a couple of references about the via, which has the
>>> ground gap problem, I need more specific data about the ground gap problem
>>> regarding the gap size, gap location.....
>>> Either measured data or simulated data will be fine ( papaers or refernce
>>> book...)
>>> Looking forward to your answers.
>>>
>>> Thanks
>>> Sangil Lee
>>>
>>>
>>>
>>
>> <<<<
>>
>>
>>
>> John Lockwood
>> Juniper Networks
>> johnl@juniper.net
>> Phone 650-318-3305
>>
>>
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>
>
>
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>
>
John Lockwood
Juniper Networks
johnl@juniper.net
Phone 650-318-3305

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