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Related Posts DAMPED AND UNDAMPED OSCILLATIONS OSCILLATOR OPERATION TUNED BASE OSCILLATOR COLPITT’S OSCILLATOR CRYSTAL OSCILLATOR Basic Oscillator Circuit The oscillatory circuit, also called the L-C circuit or tank circuit, consists of an inductive coil of inductance L connected in parallel with a capacitor of capacitance C. The values of L and C determines the frequency of oscillations produced by the circuit. The most important point is that both the capacitor and inductor are capable of storing energy—the capacitor stores energy in its dielectric field whenever a pd exists across its plates while the inductor stores energy in its magnetic field…

This article has two sections: One discusses criteria for selecting an oscillator while other one discusses various types of oscillations. 1. Selection of an Oscillator 2. Types of Oscillations Criteria for Selection of an Oscillator Here are the parameters that are to be noted while selecting an oscillator for a particular application. Frequency Range. The oscillator selected for a particular application should be ca­pable of supplying an output signal whose upper and lower frequency limits exceed those required by the application. Power and/or Voltage. The oscillator selected for a particular application should be capable of generating the pertinent quantity with…

Introduction to Oscillators An oscillator is the basic element of all ac signal sources. It generates a sinusoidal signal of known frequency and amplitude. An oscillator is one of the most basic and useful instruments used in electrical and electronic measurements. Since sinusoidal waveforms are encountered so frequently in electronic measurement work, the oscillator (sine wave generator) represents the largest single category of signal generators. This device covers the frequency range from a few Hz to many GHz. Although an oscillator is known as a sinusoidal signal “generating” device, it is to be noted that it does not create energy,…

Description. A simple sawtooth wave generator circuit for generating a saw tooth wave form using a NE555 IC is given below. The frequency of the wave form can be varied by using a POT. The capacitor C, resistor R and zener diode forms a constant current source for charging of the capacitor. When the voltage across capacitor reaches 2/3 Vcc the internal comparator inside 555 goes on and capacitor discharges. When the voltage across the capacitor goes below 1/3 Vcc the internal comparator goes off and now capacitor starts charging. As a result the capacitor will be switched between 2/3…

Description. Here is a simple variable frequency circuit based on timer NE555. Here NE55 is wired as an astable multivibrator, whose output frequency can be varied by varying a potentiometer. This circuit is a must in the work bench of a electronic hobbyist. Frequencies ranging from several Hz to several KHz can be obtained using this circuit. For very low frequencies (few Hz) replace C with a higher value electrolytic capacitor. The low frequency oscillator schematic is shown below. Circuit diagram with Parts list. Notes. The values of R and C can be obtained using the following equations. 1/f =…