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Capacitor connected to Supply voltage in RC Integrator

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Ltarek

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Why in RC Integrator circuits , Caps are connected sometimes to supply voltage instead of ground ?
 

Hi,

Measure the voltage at the capacitor wrt GND immediately after power up.

One time it is low, the other time it is high...

Klaus
 

KlausST said:
Hi,

Measure the voltage at the capacitor wrt GND immediately after power up.

One time it is low, the other time it is high...

Klaus
Click to expand...

Sorry But I don't get it

- - - Updated - - -

rcintegrator.png


Here is what I meant , Why to connect capacitor to Vdd instead of connecting it to ground ?
 

Where you connect the capacitor only has a significant effect upon power up (assuming the power supply has no significant AC noise on it).
If you connect the capacitor to ground, the capacitor voltage will remain at 0V when circuit power is applied.
If connected to power, then the capacitor voltage will immediately go to the supply voltage when power is applied (since voltage across a capacitor cannot instantly change).
 

Great . I understand , Im missing what benefit do I get from this ?
 

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