Electronic Circuits and Diagram-Electronics Projects and Design

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…