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rectifier circuit

Amplifiers:
Op-amps based full-wave rectifier circuit

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Op-amps based full-wave rectifier
circuit

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Hello,

I'd like to share with you a method that
allows a full-wave rectification with
operational amplifiers.

In order to highlight what is expected with
this circuit, you can see here-below your input
signal and the output one :

ST
op-amps are able to perform this kind of
function.
As you can see, our aim is to carry
out an absolute function with operational
amplifiers.

The best way to do it, is to
use the following schematics :

In
order to select the appropriate op-amp, it is
important to know the main constraints.
In
this case, with a ±5V input voltage you must
have :
- Vccn of U1
lower than -6V (exactly the minimum input
voltage minus a voltage
diode)
- Vccp of U2
bigger than 5.5V

In this case, I used
TS9222 op-amp in order to have a dual op-amp
with a ±6V supply voltage capability.

For
a better accuracy, the op-amp should have a low
Vio, that's another reason why the TS9222 has
been chosen.
Moreover 1% resistors should be
used, 0.1% resistors is better !

Best
regards,

Category

Product

Tags

rectifier
op-amp
TS9222

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Created
at 3/15/2012 4:53 PM  by colliard-piraud
sylvain

Last
modified at 3/15/2012 4:53 PM  by
colliard-piraud sylvain

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