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Can I use RC ckt with o/p across C to control rise time?

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The IC i am using doesn't support fast supply voltage rising, rise time must b controlled over 1ms

can I use RC ckt with o/p across C ?, it won't affect Ic's current supply.
 

rise time problem

Just a large capacitor on the power supply may do it - it depends on the power source. A small series resistor may be required, or a small inductance which would minimise the voltage drop.

Keith
 

Re: rise time problem

keith1200rs said:
Just a large capacitor on the power supply may do it - it depends on the power source. A small series resistor may be required, or a small inductance which would minimise the voltage drop.

Keith
Click to expand...


I am getting 3.3v which is source voltage for for the ic rtl8211c using a buck converter with external fets which converts 24v to 3.3v, this 3.3v is also being used by other ICs.

My another doubt is how to calculate termination resistance ? Is it required ?
How to introduce delay in signal control pins for proper latching of data by data pins.

I am using 1gbps ethernet connection as follows:

i am connecting my ethernet controller( MAC in rgmii mode ) to transceiver RTL8211c, so how to calculate termination resistance resistance?


I will appericate if someone post any valuable suggestion and link for downloading application note for RTL8211c or RTL8211b

Thanks
 

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