In previous circuit of Hartley oscillator, we used two coils L1 and L2 and one capacitor C. But in this circuit of Colpitt’s oscillator, we use two capacitors C1 and C2 with a single coil L. Let us discuss about this circuit.
Read MoreHow Colpitt’s Oscillator circuit works?
In Hartley Oscillator, the combination of L-C is used to produce high output frequency. It consists of one transistor, a tank circuit and the positive feedback to produce oscillations. Its circuit diagram is given below.
Read MoreHow Hartley Oscillator Circuit works?In LC oscillators, combination of inductor (L) i.e. coil and capacitor (C) are used. When we connect inductor (L) in parallel with capacitor (C), this combination is called tank circuit. We shall understand the working of tank circuit first.
Read MoreHow Tank or Resonant Circuit Works?The Wien Bridge Oscillator circuit is an RC oscillator which uses the basic property of Wien Bridge Circuit. It uses to stage amplifier circuit and leading-lagging RC network, as shown in the following block diagram.
Read MoreHow Wien Bridge Oscillator works? Complete working with circuitThe RC Phase shift oscillator uses common emitter configuration i.e. CE configuration of transistor. It produces 180° phase shift in addition to the phase shift of 180° by the transistor. So we get total 360° phase shift to produce positive feedback.
Read MoreHow RC Phase Shift Oscillator works? Complete working with circuitAn 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
UJT has one PN junction with two internal resistances Rb1 and Rb2 such that Rb1 is the internal resistance between base-1 and emitter. And Rb2 is the internal resistance between base-2 and emitter.
Read MoreConstruction of Uni Junction Transistor (UJT)A Metal oxide semiconductor field effect transistor (MOSFET) is also known as the IGFET i.e. insulated gate FET. The schematic constructional diagrams of both n-channel and p-channel MOSFETs are given below.
Read MoreConstruction of MOSFETThe Junction Field Effect Transistor consists of one long n-channel with two p-layers inserted at the sides. The n-channel forms the conducting path for the charges.
Read MoreJunction Field Effect Transistor (JFET)
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 ModeThere are two important parameters of a transistor: the (α) and the (β). The relation between emitter current Ie and the collector current Ic is given by the parameter, known as alpha (α) of the transistor.
Read MoreParameters of Bipolar TransistorThe PNP transistor can be used in two different modes: forward biased mode and the reverse biased mode. In forward biased mode, the current can easily flow through it. So it acts like a CLOSED SWITCH.
Read MoreHow PNP Transistor Works?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
A rectifier circuit converts AC into DC. It uses diodes for this conversion, because the diode passes current only in one direction. There are three types of rectifier circuits, HWR, FWR and BR.
Read MoreRectifier Circuits: HWR, FWR & BR
The PN junction diode conducts only in one direction. So it is known as unidirectional current device. Before going to understand the energy level diagrams, please read construction and biasing of diode.
Read MoreComparative Analysis of Energy Level Diagrams
Diodes are very cheap in cost, so it is a general thing that every electronic hobbyist has large number of diodes in his/her stock. When you pick up a diode from your stock, sometimes the cathode marking band on the body of diode, may be wiped out, so its difficult to find our the anode and cathode just by looking at it.
Read MoreHow to find out the anode & cathode of a diode using a multimeter?
When the external voltage applied to the PN junction is in such a direction that it cancels the potential barrier, thus permitting current flow, is called as forward biasing.
Read MoreWhat is Forward & Reverse Biasing of PN Junction?
A PN junction diode is the first semiconductor device in semiconductor family. It is also known as unidirectional current device, because it allows current only in one direction through it.
Read MoreConstruction of PN junction diode
