A sinusoidal oscillator is an oscillator that generates a periodic signal in the shape of a sinusoidal wave.
It is used to convert input energy from a DC source into the periodic signal's AC output energy.
Sinusoidal or harmonic oscillators are oscillators that generate an output using a sine waveform.
These oscillators are capable of producing output at frequencies between 20 Hz and 1 GHz.
This type of periodic signal has a specific frequency and amplitude.
A sinusoidal oscillator has two main parts, one is an amplifier and the other one is a feedback network.
Though, it has a feedback network the loop gain of a sinusoidal oscillator is greater than or equal to unity.
The total phase shift around the loop in a sinusoidal oscillator is either or .
There are a few types of sinusoidal oscillators: 9.1 Tuned circuit oscillator: These oscillators produce high-frequency signals using a tuned circuit made of inductors (L) and capacitors (C). As a result, they are often referred to as radio frequency oscillators (R.F. These oscillators include Hartley, Colpitts, Clapp, and others. 9.2 RC oscillators: The oscillators produce low-frequency or audio-frequency signals by using resistors and capacitors. They are also referred to as audio-frequency (A.F.) oscillators as a result. Phase-shift and Wein-bridge oscillators are examples of these oscillators. 9.3 Crystal oscillators: These quartz crystal-based oscillators provide output signals that are highly stable and have frequencies up to 10 MHz. An illustration of a crystal oscillator is the piezo oscillator. 9.4 Negative-resistance oscillator: These oscillators make use of the negative-resistance property of gadgets like tunnel gadgets. An illustration of a negative-resistance oscillator is a tuned diode oscillator.
