5 7 basic configuration for an lc oscillation.
Ceramic resonator oscillator circuit.
A 7 mhz oscillator with a variable crystal oscillator vxo operates very stably but it allows only a small frequency variation approx.
Another oscillating circuit is the one that use resonators.
The most commonly used circuit is the colpitts circuit.
What is a ceramic resonator.
The most common oscillator circuit for a ceramic resonator is a colpitts circuit.
This means it is not basically affected by external circuits or by the fluctuation of the supply voltage.
The operating principle of these oscillation circuits can be seen in fig 2 1.
The active part which makes the oscillator work is an amplifier which supplies the energy to keep the oscillation going.
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.
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.
5 5 impedance and phase characteristics for ceramic resonators fig.
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.
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.
These frequencies are utilized in many ways for their measurement of wavelength.
See that tutorial for more information.
Unlike rc or lc circuits ceramic resonators use mechanical resonance.
5 6 spurious characteristics for a typical ceramic resonator csb455e fig.
The resonator or crystal itself has two connections.
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.
The crystal oscillator and ceramic resonator are both electronic oscillator circuits.
The table briefly describes the characteristics of various oscillator elements.
5 3 electrical equivalent circuit for a ceramic resonator fig.
Remember from the inductance meter tutorial that an lc tank will resonate at its natural frequency.
Like you say the oscillator needs extra components the two capacitors.
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 design of the circuit.
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.
The material can have two or more electrode which when connected to an oscillator circuit gets mechanical.
They both use mechanical resonance from piezoelectric material like quartz crystal and ceramics and both create electrical signals of frequency when energized.
