On 6/18/2012 8:48 PM, Phil Allison wrote:
> "miso = Cunthead"
>
>>> The "pan fried sandwich" is a colossal idiot.
>>>
>>> And you are no better.
>>>
>>
>> When learning, you need to start somewhere.
>
>
> ** When bullshitting  -  you need to know when to stop.
>
>
>> I see no reason...
>
>
> ** That alone is true, the rest is purest bullshit.
>
>      Fuck off  -  you bloody troll.
>
>
> ...  Phil
>
>

You sure are one fucked up shithead. Have you considered giving up meth>?

On 06/19/2012 09:12 AM, Blarp wrote:
> On Tue, 19 Jun 2012 07:59:16 +1000, "Phil Allison"<phil_a@tpg.com.au>
> wrote:
>
>>
>> "Jon Elson"
>>>>
>>>> http://i555.photobucket.com/albums/jj477/panfilero/Capture-1.jpg
>>>
>>> This circuit has a 2:1 DC gain ...
>>
>>
>> ** Nope -  the schem as shown has a DC gain of zero.
>>
>> Without C1 ( and R2 grounded) it has a DC gain of 3, so the 2.5 volt fixed
>> input drives to op-amp to the 5V rail.
>>
>> The "pan fried sandwich" is a colossal idiot.
>>
>> And you are no better.
>>
>>
>> ....   Phil
>>
>>
>>
> On my planet, the DC gain relative to 2.5V  (without C) would be
> -R1/R2. i.e. -2x.
> I know, it is hard..

So capacitors conduct DC where you live?  Must be pretty warm there, 
which figures.  ;)

And if you think Phil A is wrong about what happens when you ground the 
C1 end of R2, why not try it and see?  (Or calculate the loop currents, 
or use the voltage divider equation, or ....)

Cheers

Phil Hobbs

Cheers

Phil Hobbs

-- 
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net

"Blarp  = Giant FART " "
>>
>>"Phil Allison"
>>
>>"Jon Elson"
>>>>
>>>> http://i555.photobucket.com/albums/jj477/panfilero/Capture-1.jpg
>>>
>>> This circuit has a 2:1 DC gain ...
>>
>>
>>** Nope -  the schem as shown has a DC gain of zero.
>>
>>Without C1 ( and R2 grounded) it has a DC gain of 3, so the 2.5 volt fixed
>>input drives to op-amp to the 5V rail.
>>
>>The "pan fried sandwich" is a colossal idiot.
>>
>>And you are no better.
>>
>
>>
> On my planet,


** Where all the locals have two heads, eight penises plus a beak.

     But no brain...


> the DC gain relative to 2.5V  (without C) would be
> -R1/R2. i.e. -2x.


** The DC gain is 3 from the + input.

 Try following the actual context, you fucking retard.



.....  Phil

On Tue, 19 Jun 2012 07:59:16 +1000, "Phil Allison" <phil_a@tpg.com.au>
wrote:

>
>"Jon Elson"
>>>
>>> http://i555.photobucket.com/albums/jj477/panfilero/Capture-1.jpg
>>
>> This circuit has a 2:1 DC gain ...
>
>
>** Nope -  the schem as shown has a DC gain of zero.
>
>Without C1 ( and R2 grounded) it has a DC gain of 3, so the 2.5 volt fixed 
>input drives to op-amp to the 5V rail.
>
>The "pan fried sandwich" is a colossal idiot.
>
>And you are no better.
>
>
>....   Phil
>
>
>
On my planet, the DC gain relative to 2.5V  (without C) would be
-R1/R2. i.e. -2x.
I know, it is hard..

On Jun 18, 4:03=A0pm, panfilero <panfil...@gmail.com> wrote:
> On Monday, June 18, 2012 9:25:39 AM UTC-5, panfilero wrote:
> > I'm simulating on LTSpice, a simple amplifier circuit with a 2.5V offse=
t, but if I don't include a capacitor on my input my output hits the rails.=
.. why is this? =A0The link shows what I'm doing in LTSpice
>
> > thanks
>
> >http://i555.photobucket.com/albums/jj477/panfilero/Capture-1.jpg
>
> sorry, the input signal is a sine wave, with no dc offset, at 10kHz with =
0.25V amplitude

Input signal has zero offset, opamp has half Vrail offset. Problem.


NT

"miso = Cunthead"

>> The "pan fried sandwich" is a colossal idiot.
>>
>> And you are no better.
>>
>
> When learning, you need to start somewhere.


** When bullshitting  -  you need to know when to stop.


> I see no reason...


** That alone is true, the rest is purest bullshit.

    Fuck off  -  you bloody troll.


...  Phil

On 6/18/2012 2:59 PM, Phil Allison wrote:
> "Jon Elson"
>>>
>>> http://i555.photobucket.com/albums/jj477/panfilero/Capture-1.jpg
>>
>> This circuit has a 2:1 DC gain ...
>
>
> ** Nope -  the schem as shown has a DC gain of zero.
>
> Without C1 ( and R2 grounded) it has a DC gain of 3, so the 2.5 volt fixed
> input drives to op-amp to the 5V rail.
>
> The "pan fried sandwich" is a colossal idiot.
>
> And you are no better.
>
>
> ....   Phil
>
>
>
>
When learning, you need to start somewhere. I see no reason to insult 
the original poster. Everyone else managed to be civilized.

Dennis wrote:
> <rcmonsen@gmail.com> wrote in message 
> news:1771316b-c27b-4469-8741-9bbf95b81f9a@googlegroups.com...
> 
>>Try centering the input around 2.5V instead of 0 volts
> 
> 
> Good suggestion, bump the offset in the sig gen to 2.5V 
> 
> 
Why not use a dual rail supply, virtual ground or
a (-) regulated DC-DC simple converter on board to
supply the (-) rail?

Jamie

<rcmonsen@gmail.com> wrote in message 
news:1771316b-c27b-4469-8741-9bbf95b81f9a@googlegroups.com...
> Try centering the input around 2.5V instead of 0 volts

Good suggestion, bump the offset in the sig gen to 2.5V