Good Day Guys,
A lot of fella's on here were very helpful last time i put up a thread so I thought i would give it another crack.
My question is can you make a switchable x 3.3 and x 1 buffer (non inverting) amp out of the same amp ?
The resistor that goes from inv i/p to Gnd I want to keep and just switch the feedback resistor.
I tried using a lower resistor in the feed back ( like 1/10th of the "to Gnd" resistor as you ad a 1 to the gain anyway - trying for a 1.1:1 gain, it didn't seem to like it.
Has anyone had any success with this type of Cct ?
I cannot just put a link as feedback because then i will kill my x 3.3 option.
At present i am switching between the two halves of an LM358 - using one amp for x 3.3 option and the other as a x 3 then dividing back down to get the 1 :1 option ( as opposed to a link)
Cheers,
Rushy
A lot of fella's on here were very helpful last time i put up a thread so I thought i would give it another crack.
My question is can you make a switchable x 3.3 and x 1 buffer (non inverting) amp out of the same amp ?
The resistor that goes from inv i/p to Gnd I want to keep and just switch the feedback resistor.
I tried using a lower resistor in the feed back ( like 1/10th of the "to Gnd" resistor as you ad a 1 to the gain anyway - trying for a 1.1:1 gain, it didn't seem to like it.
Has anyone had any success with this type of Cct ?
I cannot just put a link as feedback because then i will kill my x 3.3 option.
At present i am switching between the two halves of an LM358 - using one amp for x 3.3 option and the other as a x 3 then dividing back down to get the 1 :1 option ( as opposed to a link)
Cheers,
Rushy