What are the characteristics of EMXO vacuum micro crystal oscillator?

OCXOs (Oven Controlled Crystal Oscillators) are used when the frequency and temperature requirements are too stringent to be met by a basic XO (crystal oscillator) or TCXO (temperature compensated crystal oscillator). When using an OCXO, the temperature of the crystal and critical circuits will remain constant as the temperature outside the oscillator changes. Controlling the temperature inside the oscillator with an oven keeps the temperature constant. In an OCXO, changes in ambient temperature are sensed and then fed back to the oven controller, which is A constant optimum temperature is maintained continuously inside the oscillator housing. OCXO can increase the inherent stability of the crystal by more than 5000 times. The oven control system is not perfect, the open loop gain is not infinite, there is an internal temperature gradient inside the oven (oscillator), Whereas in a conventional oven, the circuitry of the oven casing is affected by changes in ambient temperature. 'pull' the frequency.

Compared with XO or TCXO, the temperature stability performance of traditional OCXO is greatly improved. For example, OCXO power consumption is greater than 200 times. There is also a size consideration. In ordinary OCXO, the crystal is packaged in a metal case, This is then put into an oven enclosure along with the temperature sensitive circuitry and then surrounded by thermal insulation. Then all of this and any additional circuitry is placed in a metal enclosure into a bulky package which becomes very difficult to miniaturize. In order to Overcoming these obstacles, the EX-380 series EMXO (Vacuum Micro-Oven Controlled Crystal Oscillator) was specifically developed to achieve OCXO performance while significantly reducing power consumption and packaging size