Re: sensing the signal from a IC Pin
- From: Pooh Bear <rabbitsfriendsandrelations@xxxxxxxxxxx>
- Date: Mon, 11 Jul 2005 15:52:34 +0100
"krishmaniac@xxxxxxxxxxx" wrote:
> I am using a PWM chip. It has a pin where a capacitor and resistor are
> connected. This capacitor and resistor controls the switching frequency
> of the PWM signal. I have a control circuitary where i need to use the
> signal at this pin where the capacitor and resistor are connected.
> Whenever i try to connect my circuit i see random frequency being
> created. I suppose the circuit i connected is affecting the WM chip. I
> used a buffer to isolate it, but still the problem exists. Even when i
> connect oscilloscope to see the signal at this pin i see
> malfunctioning. do u have any idea how to use a signal at a pin without
> affecting the functioning of the chip.
> any suggestions...
> kristo
Ohhhh.....
This sounds familiar ! Which PWM chip is that ? There might be a very
simple answer. More info please.
Graham
.
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