Where does the PNP transistor drain to?

Where does the PNP transistor drain to?

The current in a PNP transistor flows from the emitter to the collector. The voltage required by the transistor’s emitter, collector and base is indicated by the letter of the PNP transistor. In comparison to the emitter and collector, the base of a PNP transistor has always been negative.

What voltage should be given to a PNP transistor to turn it on high or low?

To cause the Base current to flow in a PNP transistor the Base needs to be more negative than the Emitter (current must leave the base) by approx 0.7 volts for a silicon device or 0.3 volts for a germanium device with the formulas used to calculate the Base resistor, Base current or Collector current are the same as …

What does a PNP transistor do?

PNP transistors are used to source current, i.e. current flows out of the collector. PNP transistors are used as switches. These are used in the amplifying circuits. PNP transistors are used when we need to turnoff something by push a button.

Which current will out in PNP transistor?

PNP vs NPN Transistor

Are NPN and PNP transistors interchangeable?

Answer: NPN and PNP transistors are interchangeable if you remember one simple rule: A bipolar transistor is essentially two back-to-back diodes with the base being the common connection. On the left is an NPN (negative-positive-negative) transistor and on the right is a PNP (positive-negative-positive) transistor.

How do you trigger a PNP transistor?

To turn on the transistor you need to get the voltage on the base to be 0.7V lower than the emitter, which is 9V – 0.7V = 8.3V. For example, you can now make the LED turn on when it gets dark by using a photoresistor and a standard resistor set up as a voltage divider.

Is PNP and NPN same?

As they are normally referred, PNP and NPN sensors are both supplied with positive and negative power leads, then produce a signal to indicate an “on” state. PNP sensors produce a positive output to your industrial controls input, while NPN sensors produce a negative signal during an “on” state.

What’s the difference between a PNP and NPN transistor?

The main difference between the NPN and PNP transistor is, an NPN transistor turns on when the current flows through the base of the transistor. A PNP transistor turns ON, when there is no current at the base of the transistor. In this transistor, the current flows from the emitter (E) to the collector (C).

Can I use NPN instead of PNP?

Answer: NPN and PNP transistors are interchangeable if you remember one simple rule: A bipolar transistor is essentially two back-to-back diodes with the base being the common connection.

How does the PNP transistor work in a circuit?

The circuit connection of the PNP transistor is as below. Here the emitter region has a positive bias voltage with respect to base and collector. On the other hand, the base has a negative voltage bias with respect to the emitter.

Is the PNP transistor the same as fig?

The symbol of the PNP transistor is the same as fig. One thing to note here is the current direction in both NPN and PNP transistors. This helps a lot while solving numerical problems. The circuit connection of the PNP transistor is as below. Here the emitter region has a positive bias voltage with respect to base and collector.

What does current gain in a PNP circuit mean?

Current gain = Collector current/ Emitter current (In common base transistor)

Can a pull up resistor be used to convert a sinking input to PNP?

An external pull-up resistor could be used to convert an NPN sensor to work with a sinking input. However, care must be taken, as this will invert the logic of the sensor. When the output of the NPN sensor is off, the sinking input will be pulled high. Alternatively, a pull-down resistor can be used to convert from PNP to NPN.