Electrical Engineering - Circuits - FET Transistor - Voltage Divider

Engineering
Thread starter GreenPrint
Start date Nov 6, 2013
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Circuits Electrical Electrical engineering Engineering Fet Transistor Voltage Voltage divider

In summary, the conversation discusses finding the voltage gain and output impedance for a small signal equivalent circuit. The solution involves using a technique to open the current source and inject a voltage at the output to find the current, which can then be used to calculate the output impedance. There is also a discussion about the correct configuration for the small signal circuit, and the differences between an unbypassed common-source configuration and a self-bias configuration. The correct expression for the output impedance is given and the use of an approximation is discussed. Finally, there is a mention of the value of V_{GS} not being provided and the difficulty in finding this value.

Nov 7, 2013

GreenPrint

Ya I think I punched it into my calculator wrong. I retyped it into my calculator and got the answer you got. The second one that my professor used is what is wrong. That doesn't surprise me lol. I have learned a lot from this and was able to solve the rest of the problem.

<h2>1. What is a FET transistor?</h2><p>A FET (Field-Effect Transistor) is a type of transistor that uses an electric field to control the flow of current. It has three terminals: source, drain, and gate. The gate terminal controls the flow of current between the source and drain terminals.</p><h2>2. How does a FET transistor work?</h2><p>A FET transistor works by applying a voltage to the gate terminal, which creates an electric field that controls the flow of current between the source and drain terminals. When a positive voltage is applied to the gate, it attracts negatively charged electrons to the surface of the semiconductor material, creating a conductive channel between the source and drain. This allows current to flow through the transistor.</p><h2>3. What is a voltage divider?</h2><p>A voltage divider is a circuit that divides a voltage into smaller parts. It is typically made up of two resistors in series, with the output voltage taken from the connection between the two resistors. The output voltage is determined by the ratio of the two resistors, with the larger resistor producing a larger output voltage.</p><h2>4. How does a voltage divider work?</h2><p>A voltage divider works by using the principle of Ohm's law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points. In a voltage divider, the two resistors in series create a voltage drop across each resistor, with the sum of the two voltage drops equal to the input voltage. The output voltage is then determined by the ratio of the two resistors.</p><h2>5. What are the applications of voltage dividers?</h2><p>Voltage dividers have many applications in electrical engineering, including as a level shifter, a sensor interface, a biasing circuit for transistors, and a feedback network in operational amplifiers. They are also commonly used in power supplies to provide a stable output voltage.</p>

1. What is a FET transistor?

A FET (Field-Effect Transistor) is a type of transistor that uses an electric field to control the flow of current. It has three terminals: source, drain, and gate. The gate terminal controls the flow of current between the source and drain terminals.

2. How does a FET transistor work?

A FET transistor works by applying a voltage to the gate terminal, which creates an electric field that controls the flow of current between the source and drain terminals. When a positive voltage is applied to the gate, it attracts negatively charged electrons to the surface of the semiconductor material, creating a conductive channel between the source and drain. This allows current to flow through the transistor.

3. What is a voltage divider?

A voltage divider is a circuit that divides a voltage into smaller parts. It is typically made up of two resistors in series, with the output voltage taken from the connection between the two resistors. The output voltage is determined by the ratio of the two resistors, with the larger resistor producing a larger output voltage.

4. How does a voltage divider work?

A voltage divider works by using the principle of Ohm's law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points. In a voltage divider, the two resistors in series create a voltage drop across each resistor, with the sum of the two voltage drops equal to the input voltage. The output voltage is then determined by the ratio of the two resistors.

5. What are the applications of voltage dividers?

Voltage dividers have many applications in electrical engineering, including as a level shifter, a sensor interface, a biasing circuit for transistors, and a feedback network in operational amplifiers. They are also commonly used in power supplies to provide a stable output voltage.