0
base
Umm....
Device current results from forward biasing of the emitter-base junction.
Thus you can:
1. hold the emitter constant and apply control to the base (most common), or
2. hold the base constant and apply control to the emitter (common/grounded base circuit, mostly used at high/very high frequencies).
What else can I help you with?
What are the characteristics of bipolar junction transistor?
A Bipolar Junction Transistor(a.k.a. a BJT or BipolarTransistor) is an activesemiconductor deviceformed by twoP-N junctionswhose function is amplification of an electriccurrent.
What is the difference between a transistor and scr?
SCR or Silicon Controlled Rectifiers are Bipolar junctions Transistor ( Thyristor Family), SCRs are made of two transistors thats why they PNPN or NPNP devices. The three important parts of transistor are - Emitter, Collector & Base. & the Three Important parts of SCR are - Anode, Cathode & Gate. Use of SCRs- rectification of high power AC & power control applications, such as lamp dimming, regulators and motor control. Use of Transistors - switch, audio, high voltage, amplifiers, switcher
Is BJT is a current control device or voltage control device?
transistor is a current controlled device. as the current flows through the base of the transistor , it works like a close switch.
What is Transistor Switching time?
Transistor switching times: The turn-on time of switching transistor sum of delay time (td) and rise time (tr). ton = td + tr. Delay time (td): It is defined as the time during which the collector current rises from zero to 0.1ICS.
What are the two main uses of a transistor?
a) to act as a switching device; a change in the bias voltage at the base- emitter junction can cause an increase in signal flowing through the transistor through the collector terminal and this cause the output voltage at the collector terminal to change; eg to drop to a low voltage level, this is seen as the transistor device switching on to maximum conduction rate and a low level output at the collector. b) to act an amplifer . whether the input signal is an ac type signal in which case its a signal power amplifer function; eg sound amplifer control circuits , or whether a dc input signal, in which case the input dc signal is amplfied to be reproduced as a bigger signal at the output collector terminal
The control current of a transistor flows between which two terminals?
The control current of a transistor flows between the base and the emitter terminals in a bipolar junction transistor (BJT). In a field-effect transistor (FET), the control current is related to the voltage applied between the gate and the source terminals, influencing the current flow between the drain and the source. In both cases, the control current or voltage regulates the larger current flowing through the device.
What is FET?
FET is abbreviation of Field Effect Transistor. This is a transistor in which current is controlled by voltage only and no current is drawn. It is a high input impedence device and is used in computers, telecommunication and control circuits. This transistor is better in certain parameters as compared to BJT, that is Bipolar Junction Transistor.
Is a npn transistor a process or output?
An NPN transistor is a type of semiconductor device, specifically a bipolar junction transistor, and is not classified as a process or output. It serves as a fundamental building block in electronic circuits, functioning as a switch or amplifier. In this context, it can control current flow and signal amplification, but it itself is not a process or output.
What for is the fourth terminal in jfet?
The fourth terminal in a JFET (Junction Field Effect Transistor) is typically the gate terminal. In some JFET configurations, particularly for enhancement-mode devices, a fourth terminal may be referenced as a substrate or body terminal, which can influence the characteristics of the transistor. This terminal helps manage the device's performance by controlling the depletion region and enhancing the control over the channel conductivity. In standard JFETs, though, there are usually only three terminals: source, drain, and gate.
How does a transistor electronically switch the output on?
A transistor can electronically switch the output by controlling the flow of current between its two terminals, called the collector and emitter. It has a third terminal, called the base, which acts as a control input. When a small current is applied to the base terminal, it influences the flow of current between the collector and emitter terminals, effectively turning the transistor "on" or "off" and allowing it to change the output state.
Why is fet so called?
FET stands for Filed Effect Transistor. Bipolar transistors have junctions to control current but a FET does it by controlling the conductivity of a single channel by altering the electric Field of that channel.
Why is a fet so called?
FET stands for Filed Effect Transistor. Bipolar transistors have junctions to control current but a FET does it by controlling the conductivity of a single channel by altering the electric Field of that channel.
What is a variable transistor?
A variable transistor is a type of transistor whose characteristics can be adjusted, typically to control the flow of current or voltage in a circuit. This adjustment can be achieved through various means, such as changing gate voltage in field-effect transistors (FETs) or altering the biasing conditions in bipolar junction transistors (BJTs). Variable transistors are often used in applications like amplifiers, oscillators, and signal modulation, allowing for dynamic control over electronic signals.
What is the definition of a transistor?
A transistor is a three-terminal electronic component composed of semiconducting material such as silicon or germanium. the purpose of a transistor is to use a small signal to vary the conductivity of a piece of semiconductor. The tiny signal can switch a large current on and off. Or, the signal can be used to control a larger signal, so the transistor becomes an amplifier. In Bipolar Junction transistors the large current must pass across an extremely thin insulating layer, and the width of this insulating layer controls the current.In Field Effect Transistors the large current must pass through a narrow conductive channel with insulating layers on either side. The width of this conductive channel controls the current.See also:How_does_a_transistor_work
How an n-p-n transistor can be used as a switch?
An n-p-n transistor can be used as a switch by controlling the current flowing through its base terminal. When a small current is applied to the base, it allows a larger current to flow from the collector to the emitter, turning the transistor "on." Conversely, when the base current is removed, the transistor turns "off," stopping the current flow. This on-off control allows the n-p-n transistor to effectively switch electrical circuits.
What are the characteristics of bipolar junction transistor?
A Bipolar Junction Transistor(a.k.a. a BJT or BipolarTransistor) is an activesemiconductor deviceformed by twoP-N junctionswhose function is amplification of an electriccurrent.
What is the difference between a transistor and scr?
SCR or Silicon Controlled Rectifiers are Bipolar junctions Transistor ( Thyristor Family), SCRs are made of two transistors thats why they PNPN or NPNP devices. The three important parts of transistor are - Emitter, Collector & Base. & the Three Important parts of SCR are - Anode, Cathode & Gate. Use of SCRs- rectification of high power AC & power control applications, such as lamp dimming, regulators and motor control. Use of Transistors - switch, audio, high voltage, amplifiers, switcher
