Press "Enter" to skip to content

How do I know my PNP and NPN sensor?

How do I know my PNP and NPN sensor?

Watch the meter display as you force the sensor to output. If the readout changes to a number between 10 and 30, then the sensor output is a PNP type, also known as “sourcing.” If the meter display remains at “0”, then the sensor output is an NPN type, also known as “sinking.”

Why there is 180 phase shift in CE amplifier?

Why CE configuration having 180 degree phase shift in a CE amplifier, when base voltage increase, base current increases. It causes an increase in collector current also. The collector current causes a voltage drop in the collector resistor. Thus it produces a 180 phase shift.

What are advantages of CE configuration?


  • The common emitter amplifier has a low input impedance and it is an inverting amplifier.
  • The output impedance of this amplifier is high.
  • This amplifier has the highest power gain when combined with medium voltage and current gain.
  • The current gain of the common emitter amplifier is high.

What is power gain of CE configuration?

Comparison between CB CE CC Amplifiers

Characteristic CE CB
Current gain B high α < 1
Voltage gain High (≈ 1500) High (≈ 1500)
Power gain High (≈ 10,000) High (≈ 7500)
Phase between input and output reversed same

What is the advantage and disadvantage of common emitter amplifier?

It has medium output and input impedance values. With medium current and voltage gain required for most of the day to day applications of preamplifier and power amplifiers. As an amplifier its much efficient. With low output resistance, high input resistance and more current voltage amplification.

What is β for a CE configuration?

A transistors current gain is given the Greek symbol of Beta, ( β ). As the emitter current for a common emitter configuration is defined as Ie = Ic + Ib, the ratio of Ic/Ie is called Alpha, given the Greek symbol of α. Typically, Beta has a value between 20 and 200 for most general purpose transistors.

Which biasing method is most useful?

Out of all these configurations voltage divider bias is the best, as the stability of this circuit with respect to change in beta, change in saturation current, change in base emitter voltage is more as compared to other configurations.

Why CE configuration is preferred over others?

Common emitter circuit is preferred over a common base circuit in amplifiers because the resistance of the common emitter circuit is much less than that of the common base circuit. Also the power gain in the common emitter circuit is much higher than that in a common base circuit.

What is emitter efficiency?

The emitter efficiency, gE, is defined as the ratio of the electron current in the emitter, IE,n, to the sum of the electron and hole current diffusing across the base-emitter junction, IE,n + IE,p.

Which transistor configuration is mostly used?

Common emitter transistor configuration

What is a transistor configuration?

Advertisements. A Transistor has 3 terminals, the emitter, the base and the collector. Using these 3 terminals the transistor can be connected in a circuit with one terminal common to both input and output in a 3 different possible configurations.