Oscillators
Twin-T Oscillators are another type of RC oscillator which produces a sinewave output for use in fixed-frequency applications similar to the Wein-bridge oscillator. The twin-T oscillator uses two “Tee” shaped RC networks in its feedback loop (hence the name) between the output and input of an inverting amplifier. As we have seen, an…
In the amplifier tutorials we saw that a single stage transistor amplifier can produce 180o of phase shift between its output and input signals when connected as a common-emitter type amplifier and that its output signal across the collector load depends entirely on the input signal injected into the transistors base…
Some of the factors that affect the frequency stability of an oscillator generally include: variations in temperature, variations in the load, as well as changes to its DC power supply voltage to name a few. Frequency stability of the output signal can be greatly improved by the proper selection of…
In this blog post , we will explore the Colpitts oscillator and its working mechanism. We will learn the circuit diagram and try to understand the working mechanism of it. Introduction In many ways, the Colpitts oscillator is the exact opposite of the Hartley Oscillator we looked at in the previous tutorial….
Oscillators convert a DC input (the supply voltage) into an AC output (the waveform). This output waveform can have a wide range of different shapes and frequencies, and can be either complex in shape, or be a simple pure sine wave depending upon the application. Oscillators are used in many pieces…
In the RC Oscillator tutorial we saw that a number of resistors and capacitors can be connected together with an inverting amplifier to produce an oscillating circuit. One of the simplest sine wave oscillators which uses a RC network in place of the conventional LC tuned tank circuit to produce a sinusoidal…
One of the main disadvantages of the basic LC Oscillator circuit we looked at in the previous tutorial is that they have no means of controlling the amplitude of the oscillations and also, it is difficult to tune the oscillator to the required frequency. If the cumulative electromagnetic coupling between…