[sdiy] converting a 10v p to p to a 0-5 volt signal

[Tim Parkhurst]

On Wed, May 20, 2009 at 6:20 AM, Ray Wilson <raywilson at comcast.net> wrote:
> You can definitely get gains less than one. Look at an expo convertor summer
> for example. The 100K input resistors and 2K feedback resistor result in a
> gain of .02. The formula still applies Feedback-R divided by Input-R.
>
>

Actually, Dave was asking about a NON-inverting op amp. The expo
converter summer (the one used on the Sound Lab VCOs for example) is
an inverting summer. I actually read Dave Kendall's message wrong at
first and also thought he was talking about an inverting circuit. I'm
of the same opinion as Dave though. I'm pretty sure you can't get a
gain of less than one in a non-inverting config., this being one of
the reasons why the inverter/summer is so common.


Tim (could be wrong, since I haven't had my morning tea yet) Servo
-- 
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings