piclist 2001\01\21\155703a >
Thread: Voltage Amplifier
www.piclist.com/techref/power.htm?key=voltage
face picon face BY : Olin Lathrop email (remove spam text)



> I want to use an amplifier for my ultrasonic receiver. the output of my
> ultrasonic receiver is very small (few mV) at 40 kHz that i want to
amplify
> the signal to around 2-5 Volts. I have tried using simple design of
> operational amplifier, the inverting and non-inverting op-amp, but i could
> not get the output.

So you want a gain of about 1000 starting at a few millivolts with around
100KHz bandwidth.  By the way, a few mV is not very small.  It is well large
enough to allow such amplification without introducing much noise.
Microphones often put out in the microvolts range.

A gain of 1000 if a bit much for a single stage.  I would use two stages
each with a gain around 30.  That means you need amps with gain*bandwidth of
somewhat over 3M, which isn't that hard to find.  Two stages also allows for
high pass filtering between the stages to eliminate DC offsets from the
first stage.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, olinspamembedinc.com, http://www.embedinc.com

--
http://www.piclist.com hint: To leave the PICList
piclist-unsubscribe-request@spam@spammitvma.mit.edu


<002301c083e9$9e706ac0$260bf6cd@pc> 7bit

See also: www.piclist.com/techref/power.htm?key=voltage
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) Voltage Amplifier

month overview.

new search...