need EXTREMELY low level (<0.2v) boost to 1v max DC signal

[jacob.zurasky]

You might also want to read the sections to the left before the averager and summer section to better understand how an op-amp works and how to set the gain. -Jacob

 

[TheVictim]

The reason why I bash RS salespeople is their company chooses NOT to educate the employees. There are consumer electronics corporations that do and it is a great thing to see. If you come around my part of the country, walk into a Magnolia Hi-Fi and be amazed...

 

[evotec1]

i agree.

 

[jacob.zurasky]

TheVictim, what part of the country are those stores in? Ive never even heard of them

 

[evotec1]

We got one here i tacoma, mostly high end electronics i thought

 

[TheVictim]

Yeah they are, but just TRY and stump one of their people with a complex audio, video, or wireless question. They go through WEEKS of training.

 

[evotec1]

ok, in the diagram on page "http://www.allaboutcircuits.com/vol_3/chpt_8/8.html " under the section about "noninverting summer circuit" there is a value for R that is equal, and placed on all 3 of the input voltages.

Can this resistance value be anything, such as nothing?

If not, How can I calculate an appropriate resistance for this value?

 

[Russlk]

Yes, you can have as many or as few summing inputs as you want. The gain for each input is Rf/Rin.

 

[evotec1]

thanks for the input, you guys really know your stuff!