opamp with 0-5vinput and +/-5v output

[John Popelish]

dimention11 wrote:

Ok I have finished my design and I am wondering if anyone would like to
check it for me.
I used eagle to make the schematic. I will send it via email just leave a
post here or on my email.
Thanks.

You can post a binary file to alt.binaries.schematics.electronic

Most of us also watch that group.

Otherwise, you will have to post it to some web host and give us a
link for it. If the schematic is in a standard graphic format you may
also email it to me, but that won't let anyone else correct my
mistakes when I comment on it.

 

[John Popelish]

dimention11 wrote:

Oh and also
The amp I will be driving from this has either
signal and gnd or signal and -ve signal as inputs.

If I wished use the -ve signal
I would hook the feedback resistors from the output and then to the +ve
input of the opamp. Is this correct?

No. if the input range or offset changes, you need to change the gain
via the resistor ratio and the offset voltage the divider is
connected to.

 

[dimention11]

"John Popelish" <jpopelish@rica.net> wrote in message
news:ruudneAHLbL5kSffRVn-pw@adelphia.com...

dimention11 wrote:
Ok I have finished my design and I am wondering if anyone would like to
check it for me.
I used eagle to make the schematic. I will send it via email just leave a
post here or on my email.
Thanks.

You can post a binary file to alt.binaries.schematics.electronic

Most of us also watch that group.

Otherwise, you will have to post it to some web host and give us a link
for it. If the schematic is in a standard graphic format you may also
email it to me, but that won't let anyone else correct my mistakes when I
comment on it.

If I want to take the same signal and run it through the
original opamp setup you gave me, but also produce
an inverted(opposite) version of the same signal.

Do I simply use an inverting opamp with equal value resistors?
Or am i way off

 

[John Popelish]

dimention11 wrote:

If I want to take the same signal and run it through the
original opamp setup you gave me, but also produce
an inverted(opposite) version of the same signal.

Do I simply use an inverting opamp with equal value resistors?
Or am i way off

The inverting version has the input going to the resistor that
connects to the voltage reference in the non inverting version. And
the offset reference goes to the + input. However, the gain for the
inverting version is one less than the non inverting version. equal
resistors gives a gain of 1 instead of 2.

This is covered in the opamp tutorial I pointed you toward, earlier.

 

[dimention11]

Thankyou I was just looking at the diagrams without looking at the maths :x
My bad

"John Popelish" <jpopelish@rica.net> wrote in message
news:GvadnVciNbIjvSffRVn-gg@adelphia.com...

dimention11 wrote:

If I want to take the same signal and run it through the
original opamp setup you gave me, but also produce
an inverted(opposite) version of the same signal.

Do I simply use an inverting opamp with equal value resistors?
Or am i way off

The inverting version has the input going to the resistor that connects to
the voltage reference in the non inverting version. And the offset
reference goes to the + input. However, the gain for the inverting
version is one less than the non inverting version. equal resistors gives
a gain of 1 instead of 2.

This is covered in the opamp tutorial I pointed you toward, earlier.

Thankyou I was just looking at the diagrams without looking at the maths :x
My bad