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Simple Packaged Crystal Oscillator (SPXO)
The simplest type of crystal oscillator, without temperature compensation functionality.
Temperature Compensated Crystal Oscillator (TCXO)
Uses an additional temperature compensation circuit to reduce the impact of temperature changes on frequency.
Oven Controlled Crystal Oscillator (OCXO)
Utilizes a thermostat to keep the crystal oscillator at a constant temperature, achieving the highest frequency stability.
VCXO Oscillator (VCXO)
Adjusts the oscillation frequency through an external control voltage.
Digitally Compensated Crystal Oscillator / Microprocessor Compensated Crystal Oscillator (DCXO/MCXO)
Uses digital or microprocessor technology for temperature compensation.
Parallel Crystal Oscillator
Uses a transistor along with capacitors and resistors to form an amplification circuit, where the quartz crystal acts as an inductor in the circuit.
Series Crystal Oscillator
Employs a two-stage amplification circuit, where the quartz crystal forms part of the feedback circuit and also provides frequency selection capabilities.
Voltage Controlled Crystal Oscillator is a type of crystal oscillator that connects a varactor diode in series with the crystal resonator. The capacitance of the diode changes based on an externally applied voltage, allowing the output frequency to vary with changes in the load capacitance characteristics of the crystal resonator. Its output frequency can be controlled by the input voltage, typically with a control range of ±50 to ±200ppm.
Working Principle
By changing the applied adjustment voltage, the value of the capacitive load CL can be altered, thereby adjusting the frequency. Due to the adjustable oscillation frequency characteristic of VCXO oscillator, frequency-temperature stability is used to define the impact of ambient temperature changes on frequency deviation. Since VCXO oscillators lack temperature compensation capabilities, they should be placed away from heat sources when laying out PCBs.
Voltage Controlled Crystal Oscillator (VCXO) is a precise timing device that can adjust its output frequency based on the input control voltage.
XtalTQ VCXO oscillators are widely used in telecommunications, data communications, and audio industries, offering fine-tuning capabilities to ensure synchronization and frequency stability in complex electronic systems.
As a leading professional VCXO manufacturer in China, XtalTQ is committed to providing high-quality voltage controlled crystal oscillators. XtalTQ has advanced equipment and a professional technical team to ensure the VCXO oscillators produced have outstanding performance.
