Ceramic Resonator Oscillator Circuit

5 5 impedance and phase characteristics for ceramic resonators fig.

Ceramic resonator oscillator circuit.

See that tutorial for more information. 5 3 electrical equivalent circuit for a ceramic resonator fig. The resonator or crystal itself has two connections. Before we look at the ceramic and crystal resonators let s take a look at the lc oscillator so we need a coil and capacitor.

The operation with a ceramic resonator can be considered as the same. The crystal oscillator and ceramic resonator are both electronic oscillator circuits. Remember from the inductance meter tutorial that an lc tank will resonate at its natural frequency. Similar to the crystal oscillator ceramic resonator is also an electronic circuit or a device used to generate an output of oscillation frequency with the help of ceramic as a resonating piezoelectric material.

The design of the circuit. This means it is not basically affected by external circuits or by the fluctuation of the supply voltage. The most commonly used circuit is the colpitts circuit. The active part which makes the oscillator work is an amplifier which supplies the energy to keep the oscillation going.

They both use mechanical resonance from piezoelectric material like quartz crystal and ceramics and both create electrical signals of frequency when energized. The most common oscillator circuit for a ceramic resonator is a colpitts circuit. In a colpitts circuit an inversion of 180 is used and it is inverted more than 180 with l and c in the feedback circuit. 5 4 equivalent circuit for a ceramic resonator in the frequency range of fr f fa fig.

On the left the crystal right the ceramic resonator. Vfo with ceramic resonator. A ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or more metal electrodes attached. Hartley circuit in a ceramic resonator oscillator the inductor is replaced by a ceramic resonator taking advantage of the fact that the resonator becomes inductive between resonant and anti resonant frequencies.

Highly stable oscillation circuits can therefore be made without the need of adjustment. What is a ceramic resonator. Unlike rc or lc circuits ceramic resonators use mechanical resonance. The table briefly describes the characteristics of various oscillator elements.

Like you say the oscillator needs extra components the two capacitors. The operating principle of these oscillation circuits can be seen in fig 2 1. When connected in an electronic oscillator circuit resonant mechanical vibrations in the device generate an oscillating signal of a specific frequency like the similar quartz crystal they are used in oscillators for purposes such as generating. 5 7 basic configuration for an lc oscillation.

Another oscillating circuit is the one that use resonators. These frequencies are utilized in many ways for their measurement of wavelength. In contrast a vfo with an lc resonant circuit can be tuned over a range of several hundred khz but its frequency stability will depend upon its construction.