Hello everybody !
I am a newcomer to the electronics field. Please spare me if I have some questions so simple, but actually I have difficulties to understand the terms and notions in the electronics. I got a trouble in the understanding "the noise". What is it and how does it exist ?
Suppose the output voltage from a pin on the chip is 5 V and the output current is quite small 3 mA, then we connect the pin to a load with low resistance 100 ohm. According to Ohm's law, the current passing through the resistor is
5 / 100 = 50 mA
But the output current of the chip is about 3 mA. Is it possible for the current turning from 3mA to 50mA. Besides, in the DC series circuit, the current is determined by the source voltage and the equivalent resistors, hence we cannot change or turn the current intensity by someway or at anytime other than changing the resistor. It makes me very confused at this point, so thanx in advance for any helps.
Thanx,
I am a newcomer to the electronics field. Please spare me if I have some questions so simple, but actually I have difficulties to understand the terms and notions in the electronics. I got a trouble in the understanding "the noise". What is it and how does it exist ?
Suppose the output voltage from a pin on the chip is 5 V and the output current is quite small 3 mA, then we connect the pin to a load with low resistance 100 ohm. According to Ohm's law, the current passing through the resistor is
5 / 100 = 50 mA
But the output current of the chip is about 3 mA. Is it possible for the current turning from 3mA to 50mA. Besides, in the DC series circuit, the current is determined by the source voltage and the equivalent resistors, hence we cannot change or turn the current intensity by someway or at anytime other than changing the resistor. It makes me very confused at this point, so thanx in advance for any helps.
Thanx,