Transistor as an Amplifier Amplifier circuitcan be defined as, a circuit which is used to amplify a signal. The input of the amplifier is a voltage otherwise current, where the output will be an amplifier input signal. An amplifier circuit which uses a transistor otherwise transistors is known ...
But the purpose of the transistor (an electrical switch or amplifier) is essentially the same. What is a transistor and its function? A transistor is a semi-conductive electrical device. It is most often used as a microscopic on-off switch within an electrical circuit, or used to amplify a...
1. A small electronic device containing a semiconductor and having at least three electrical contacts, used in a circuit as an amplifier, detector, or switch. 2. Any of various devices serving the same purpose but employing a different technology: an optical transistor. 3. A transistor radio....
When both junctions are connected in reverse bias, the transistor behaves as an open circuit or OFF switch. In this condition, the input voltage or the base voltage is zero. Therefore, the entire Vcc voltage appears across the collector. But, because of the reverse bias of the collector-emit...
In apower supplysystem, a regulator is an essential component, used to control the output power in power electronics. The power electronics can be defined as the control as well as the conversion of electrical power in the part of electronics. A voltage regulator generates a stable output for ...
This invention pertains generally to a preamplifier, and more particularly to a transistor preamplifier suitable for use for a microphone, such as that employed for a tape recorder. BACKGROUND OF THE INVENTION Generally, a dynamic microphone has an output level ranging from about + 60 dB in or...
L1andC1: An inductor and capacitor pair that form part of the resonant circuit, working with Y1 to set the oscillation frequency. C3 and C2: Capacitors that provide AC coupling and help filter noise. Buffer Amplifier(right section): This section buffers the output to isolate the oscillator fro...
Thus, when the transistor is used as an amplifier and the input current varies over a typical range (10–1), the base-emitter voltage varies only little about 0.7 V. These concepts will become clearer when we consider transistor amplifiers. There is no significant difference in the operation ...
Although transistors (BJTs) are popularly used for making amplifier circuits, these can be also effectively used for switching applications.
The MOSFET operates as a switch when it shifts between linear and cutoff modes. The transistor may act as an amplifier in the circuit as shown in Figure 1.9. Sign in to download full-size image Figure 1.9. An nMOS transistor in a circuit acting as an amplifier. In this simple circuit, ...