Table of Contents
- 1 Is a transistor a current control device explain?
- 2 Why transistor is called current controlled and not voltage controlled device?
- 3 What is current controlled current source?
- 4 Why BJT is called current controlled device Quora?
- 5 What is a control device?
- 6 Are all transistors current controlled devices?
- 7 Why is a transistor called a volatage controlled device?
Is a transistor a current control device explain?
The voltage across a base-emitter junction is set so that the electric field due to this external voltage will reduce the width of the depletion region. This electric field determines the flow of the charge carriers in a transistor. So, we can conclude that a transistor is a current-controlled voltage device.
What is mean by current controlled device?
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. Bjt has a finite input impedance so it has a small finite base current which controls the output current.
Why transistor is called current controlled and not voltage controlled device?
It is a current controlled device because the base current controls the flow of current from the emitter to collector. In the linear region of operation the collector current is controlled proportionally to the base current by a multiplier we call Beta.
Which of following is current controlled device?
Explanation : All field effect transistors are voltage controlled devices.
What is current controlled current source?
A current source that depends on a voltage input is generally referred to as a Voltage Controlled Current Source or VCCS. A current source that depends on a current input is generally referred too as a Current Controlled Current Source or CCCS.
How does transistor amplify current?
A transistor acts as an amplifier by raising the strength of a weak signal. The DC bias voltage applied to the emitter base junction, makes it remain in forward biased condition. Thus a small input voltage results in a large output voltage, which shows that the transistor works as an amplifier.
Why BJT is called current controlled device Quora?
BJT is a current controlled device because the output characteristics of BJT are determined by the input current. In a p-n junction i.e base-emitter junction in BJT the change in voltage (Vbe) is produced only after the change in base current.
Which semiconductor device is the current controlled device?
Whereas the bipolar transistor can be considered a current-controlled device (the current in the base), the field effect transistor is a voltage-controlled device. The field effect transistor, or FET, has the symbol shown in Figure 11.17 shows the family of transistors.
What is a control device?
Control device means any equipment that reduces the quantity of a pollutant that is emitted to the air. Control device efficiency means the ratio of the pollutant released by a control device and the pollutant introduced to the control device.
How is current controlled in a circuit?
The charge passing through the circuit always passes through an appliance (which acts as a resistor) or through another resistor, which limits the amount of current that can flow through a circuit. The appropriate voltage and resistance in a circuit keeps the current in control and keeps the circuit safe.
Are all transistors current controlled devices?
Not all transistors are current controlled devices. Bipolar Junction Transistors better known as BJT are current controlled devices. So the right question to ask would be why is a BJT current controlled device? I will try to keep the answer simple and avoid esoteric terms, in turn compromising technical perfection of the answer a bit.
Why is a bipolar junction transistor called a current controlled device?
By you question, it seems that you are asking about Bipolar Junction Transistor (BJT). It is a current controlled device because the base current controls the flow of current from the emitter to collector. In the linear region of operation the collector current is controlled proportionally to the base current by a multiplier we call Beta.
Why is a transistor called a volatage controlled device?
In a nutshell, it’s because a small current applied to the base of the transistor controls a much larger collector current. Hence the name. Where as FET,MOSFET ARE volatage controlled.
Why is an emitter a current controlled device?
It is a current controlled device because the base current controls the flow of current from the emitter to collector. In the linear region of operation the collector current is controlled proportionally to the base current by a multiplier we call Beta.