An operational amplifier (Opamp) is a versatile device which can be used to amplify AC as well as DC signals. It is manufactured in the form of integrated circuit package. It can perform different mathematical operations like addition, subtraction, integration, taking the derivative, comparison, etc. Hence it is known as operational amplifier.
Read MoreFundamentals of Operational Amplifier
An electronic oscillator is a circuit which can produce alternating voltage i.e. AC voltage from DC voltage like battery. It consists of semiconductor devices like transistor, MOSFET, etc.
Read MoreIntroduction to Electronic Oscillators
The small input voltage Vin is amplified by the transistor and we get output voltage Vo across emitter resistor of the transistor. In this configuration, when input signal is positive going, output is also positive and when input is negative output is also negative, as shown in above wave diagram.
Read MoreCommon Collector Configuration: CC ModeIn this circuit, the emitter is common to both input and output terminals of amplifier circuit. Thus, the input signal is connected between base & emitter and the amplified output signal is taken between collector & emitter, so that emitter is common.
Read MoreCommon Emitter Configuration: CE ModeThe transistor is used as an amplifier. But in amplifier circuit there two input terminals and two output terminals. However, the transistor has only three terminals. So any one terminal of the transistor is KEPT COMMON to the input and output terminals of amplifier circuit.
Read MoreCommon Base Configuration: CB Mode
Bipolar and unipolar transistors can be categorized according to their basic functionality. In bipolar transistor the electric current flows due to BOTH electrons and holes through it. However, in unipolar transistor the current flows EITHER due to electrons OR holes through it.
Read MoreIntroduction to Bipolar & Unipolar Transistors
