# simple opamp amplifier circuit

Started by June 18, 2012
```"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 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

Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net
```
```On 6/18/2012 8:48 PM, Phil Allison wrote:
>
>>> 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>?

```
``` "miso = Cunthead"

FUCK OFF  you  COLOSSAL  SHITHEAD !!

```