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· Different definitions
Constant temperature crystal oscillator: constant temperature crystal oscillator is referred to as constant temperature crystal oscillator, abbreviated as OCXO (Oven Controlled Crystal Oscillator) in English
Temperature-compensated crystal oscillator: temperature-compensated crystal oscillator (TCXO), abbreviated as TCXO (Temperature Compensated Crystal Oscillator) in English
· Different principles
Constant temperature crystal oscillator: a crystal oscillator that uses a constant temperature tank to keep the temperature of the quartz crystal resonator in the crystal oscillator constant, and minimizes the change in the oscillator output frequency caused by the ambient temperature change.
Temperature-compensated crystal oscillator: a temperature compensation network is built using thermistors, and the temperature-frequency curve of the quartz crystal is compensated by calculation to make it smooth, so as to achieve frequency stability in a wide temperature range.
· Different measurement accuracy
Constant temperature crystal oscillator: the frequency stability of constant temperature crystal oscillator is more than two orders of magnitude higher than that of temperature-compensated crystal oscillator, which can reach the order of 10^-8.
Temperature-compensated crystal oscillator: temperature-compensated crystal oscillator can generally reach the order of 10^-6.
· Different application scenarios
Oven-controlled crystal oscillators: usually used in applications that require very high clock accuracy, such as satellite navigation, wireless communication base stations, scientific instruments and precision measuring equipment.
Temperature-compensated crystal oscillators: temperature-compensated crystal oscillators are usually used in applications that require a higher-precision clock source, such as GPS receivers, communication equipment and satellite communication systems.
