Why mosfet is voltage controlled

Enviado por manish. Denunciar este documento. Fazer o download agora mesmo. Pesquisar no documento. Answer Related Questions Why is bjt current controlled? A current controlled is a source which is controlled or driven by a current source. A voltage contolled is one which is driven by a voltage source. Now, Bjt is a current controlled because. Also, we know the current equation.. Punith Gowda M B. Instant Essay Writing. Yess Gareca. Akbar Syed.

Hanah Tobias. Valeri Valentinov. Cristina Borocan. Dennis Downs Livingston. Kakumanu Siva. A MOSFET, therefore, in conjunction with a power supply, can act as a voltage controlled current source in which the drain current is controlled by the gate voltage.

Thus, essentially no power must be delivered by the voltage applied to the gate. Toggle Navigation. Since each type of source can be controlled by either a voltage or current, there are four types of dependent current sources: Voltage-Controlled Voltage Source VCVS.

Another choice can be to use an integrated VCR. You have to consider few important parameters before using as a variable resistor. Main things are. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Asked 8 years, 5 months ago.

Active 2 years ago. Viewed 70k times. I am hacking an existing device and can not replace the resistor R1. A voltage-controlled resistor VCR is a three-terminal active device with one input port and two output ports. The input-port voltage controls the value of the resistor between the output ports. FETs are devices with three terminals: source, gate, and drain. FETs control the flow of current by the application of a voltage to the gate, which in turn alters the conductivity between the drain and source.

FETs are also known as unipolar transistors since they involve single-carrier-type operation. The major difference between BJT and FET is that in a field-effect transistor only majority charge carries flows, whereas in BJT both majority and minority charge carriers flow…. A FET is a three terminal device, having the characteristics of high input impedance and less noise, the Gate to Source junction of the FET is always reverse biased.

In amplifier application, the FET is always used in the region beyond the pinch-off. The drain current remains constant with the drain voltage. The pinch-off region saturation region for a FET is the operation with more than a few volts.