Buffer circuits?
- From: "Ron J" <bigschlong@xxxxxxxxx>
- Date: 19 Dec 2005 10:40:57 -0800
All,
Merry Christmas and a Happy New Year!
I was looking through some sensors on Digikey. Some of the ratings are
given at a certain load. For instance, 50 mV at 1 k-ohm. If I wanted to
bump this voltage a bit higher, can I use the following op amp buffer
ckt?
The sensor output is connected to 1 k-ohm resistor with one resistor
terminal connected to the non-inverting op amp input and the other
terminal is grounded. The opamp output is looped back to the inverting
input using a low loss piece of wire. The opamp output is then
connected to my measurement device.
Will this type of circuit work accurately with little deviation from
the original voltage input at the opamp?
I was thinking of all the losses that is encountered from the input of
the opamp to its output. My main concern is that since the output
deviation of the sensor only goes up to 50 mV at 1k-ohm, then noise
might affect it significantly compared to a higher output voltage,
right?
Thanks!
.
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