Calculate output voltage PNP/MOSFET

[fraulein777]

How do you calculate Vo using PNP/MOSET? What principles are used please?

 

[berkeman]

How do you calculate Vo using PNP/MOSET? What principles are used please?

Welcome to the PF.

Your question is overly broad. What learning materials have you used so far? Have you done some reading on Wikipedia? What kind of Google searching have you done on this question? Do you have access to circuit design textbooks (maybe at your local library for example)?

 

[fraulein777]

I have a degree from 1990, Ele Eng, and I am brushing up on some exercises to aide me for job interviews. I just need some tips and or rules to aide me in solving a simple MOSFET schematic problem. I am finding the output voltage. I did ok on the NPN problems, I binged some good examples but I am getting rather confused with pnp and differences with calculations w mosfet.

 

[berkeman]

I have a degree from 1990, Ele Eng, and I am brushing up on some exercises to aide me for job interviews. I just need some tips and or rules to aide me in solving a simple MOSFET schematic problem. I am finding the output voltage. I did ok on the NPN problems, I binged some good examples but I am getting rather confused with pnp and differences with calculations w mosfet.

Have you reviewed the Wikipedia page on MOSFETs? It's pretty informative:

http://en.wikipedia.org/wiki/MOSFET

.

 

[alphysicist]

To calculate the output voltage of a PNP/MOSFET circuit, you first need to understand the basic principles of the two components. A PNP transistor is a type of bipolar junction transistor (BJT) that uses two layers of P-type semiconductor material sandwiched between a layer of N-type material. On the other hand, a MOSFET (metal-oxide-semiconductor field-effect transistor) uses a different type of construction, with a metal gate electrode on top of an insulating layer, on top of a semiconductor material.

To calculate the output voltage (Vo) using a PNP/MOSFET circuit, you need to consider the input voltage (Vi), the resistance values of the circuit components, and the characteristics of the PNP and MOSFET transistors. The output voltage is determined by the voltage drop across the load resistor (RL) in the circuit, which is connected between the collector of the PNP transistor and the drain of the MOSFET.

The principles used to calculate Vo in this circuit include Ohm's law, which states that the voltage (V) across a resistor (R) is equal to the current (I) through the resistor multiplied by the resistance (V=IR). In this case, the current through the load resistor is determined by the voltage applied to the base of the PNP transistor, which is controlled by the MOSFET.

The MOSFET acts as a voltage-controlled switch, and its gate-source voltage (Vgs) determines the current flowing through the device. When Vgs is high enough, the MOSFET is in saturation mode and allows a large current to flow through the PNP transistor, resulting in a high output voltage. When Vgs is low, the MOSFET is in cutoff mode and no current flows through the PNP transistor, resulting in a low output voltage.

To calculate Vo, you need to use the following formula: Vo = Vi - (Vgs + Vbe), where Vbe is the voltage drop across the base-emitter junction of the PNP transistor. This formula takes into account the voltage drop across both the MOSFET and the PNP transistor, which affect the output voltage.

In summary, to calculate the output voltage of a PNP/MOSFET circuit, you need to understand the basic principles of the components involved, including Ohm's law and the behavior of the MOSFET as a voltage-controlled switch. By considering the input voltage and