Unipolar to Bipolar

Jun 15, 2007 10 Replies

Hi guys



I need to convert a sine wave signal 0 - 3V into -9 to +9 sine wave. I think I need to use Opamp but I am not able to figure out circuit.



How can I do it?



Summing amplifier Av=9 (Was 3Vpp changing to 18Vpp) Signal + offset DC D from BC

One of many ways...

|\\ INPUT o------------|+\\ | \\ | \\ | |------+--o OUTPUT | / | | / |

+12V o--6.66K--+---|-/ | | |/ | | | +------5K-------+ | | 1.1765K | | GND

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | America: Land of the Free, Because of the Brave

Ooops..not Av=9...Its Av=6 ..and the Mars probe bumps into a rock never able to go into reverse.. D from BC

Don't believe it- the aged fart actually posted an ASCII schematic!!!!

Now, now! This "aged fart" just returned from a seminar on CSI ;-)

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | America: Land of the Free, Because of the Brave
** Groper Alert !
** Use a capacitor to remove the DC offset from the original sine wave - gives a sine wave that has +/- 1.5 volt peaks.

Follow that with a amplifier stage with gain of 6.

...... Phil

Oh Buggerit!! You got there before me.....

Tony Williams.

Congrats, Jim, it's nice to post drawings that become a permanent part of the record.

Channel State Information, I assume. I've better things to do with my time.

Criminal Forensics "Road Scholar" 5-day seminar given by the MIT Alumni Association at University of California, Riverside... UCal's center for forensics education.

Very interesting stuff.

What "... better things to do with (your) time" ??

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | America: Land of the Free, Because of the Brave

Crime Scene Instigator? ;-)

-- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85.

Michael A. Terrell Central Florida

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