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Date: Wed, 23 Jul 2014 17:32:42 -0400
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Subject: Re: [geda-user] Re: Layers and footprints
From: Evan Foss <evanfoss AT gmail DOT com>
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Precedence: bulk

Ok. I figured array parts would be more like R01.001 or something but
if you do away with refdes entirely for parts in the array life gets a
lot easier. That said it still feels like an issue for post gschem
stuff.

On Wed, Jul 23, 2014 at 4:35 PM, John Griessen <john AT ecosensory DOT com> wrote:
> On 07/23/2014 01:46 PM, Evan Foss wrote:
>>
>> I should think the subcircuit really just
>> needs some special tag on it's page that will indicate the Rx, Cx and
>> other reference designators will be altered after netlisting &
>> tessellation on the layout.
>
>
>
> In chips or big circuits with repeated elements the burden would be huge.
> Flat netlisting would grind to a halt for circuits with 40 elements repeated
> 64 times
> in one area, and 50 other cases of the same in the whole circuit.  That
> example
> is 128K circuit elements used to make shift registers, and not even
> estimating RAM
> and ROM to use.
> But printed electronics that goes on the door of a washing machine could get
> that way easily.
> There would be plenty of ROM to encode your programs, and some RAM to run
> out of,
> all made in a slow large CMOS type of organic or nano inorganic
> semiconductor set of materials
> printed on the surface of the door panel so it can dissipate heat and have
> low low leakage
> and low low power consumption, and slow boring performance to go with that.
> But fine for
> motor control and a UI, and there would be a few chips added to transition
> to the faster networking
> circuit world around that slow washing machine bot.  The circuit area would
> look like
> all wires and flat patches of capacitance and transistors with no 3D
> components anywhere except a few
> at the edge with an ethernet cable or wireless going out, or at the edge
> with the motor control
> where there are a few special power transistors attached..
>
>
> Think about making a 64 bit ALU...it would get super tedious to have unique
> ref des's for
> all those transistors.  You really just need to know they come from "such
> and such"
> module that has been simulated plenty and can be used with up to so much
> length of wires away.
> Each placement of a module does not need its own unique identifier for
> module's R1, R2, C1.
> They can all be called  R1, R2, C1, and exist in different instances of the
> identical
> module, where the instances are kept track of in the netlist and by gschem.
>
>
> There would be no components needing a ref des anyway in an array repetitive
> circuit case, since
> the circuit elements would be completed from primitives like in chip
> mask making, not by an assembly step needing a ref des.



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