Ceramic Resonator Oscillator Circuit

The operating principle of these oscillation circuits can be seen in fig 2 1.

Ceramic resonator oscillator circuit.

What is a ceramic resonator. 5 7 basic configuration for an lc oscillation. Another oscillating circuit is the one that use resonators. A 7 mhz oscillator with a variable crystal oscillator vxo operates very stably but it allows only a small frequency variation approx.

The resonator or crystal itself has two connections. 5 6 spurious characteristics for a typical ceramic resonator csb455e fig. These frequencies are utilized in many ways for their measurement of wavelength. 5 4 equivalent circuit for a ceramic resonator in the frequency range of fr f fa fig.

A ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or more metal electrodes attached. The table briefly describes the characteristics of various oscillator elements. See that tutorial for more information. Remember from the inductance meter tutorial that an lc tank will resonate at its natural frequency.

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. Unlike rc or lc circuits ceramic resonators use mechanical resonance. 5 5 impedance and phase characteristics for ceramic resonators fig. 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.

Highly stable oscillation circuits can therefore be made without the need of adjustment. This means it is not basically affected by external circuits or by the fluctuation of the supply voltage. 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. The active part which makes the oscillator work is an amplifier which supplies the energy to keep the oscillation going.

Like you say the oscillator needs extra components the two capacitors. The material can have two or more electrode which when connected to an oscillator circuit gets mechanical. The most commonly used circuit is the colpitts circuit. 5 3 electrical equivalent circuit for a ceramic resonator fig.

The operation with a ceramic resonator can be considered as the same. Vfo with ceramic resonator. The design of the circuit. The crystal oscillator and ceramic resonator are both electronic oscillator circuits.

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. On the left the crystal right the ceramic resonator. 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.