The main application areas are high precision equipment, such as space clock system, as there are large areas of environmental changes in temperature. Its working principle is added near the heater thermostat, in general, the heater and the crystal co encapsulated in a shell, the following please with Realglant to understand the principle and application of TCXO.

Principle of TCXO:

TCXO is away from is through induction of the environmental temperature, temperature information to make appropriate transform to control the output frequency of the crystal oscillator, achieve the effect of stabilization of the output frequency. Traditional TCXO is composed of analog compensation. With development of compensation technology, a lot of digital compensation TCXO began to appear, the digital compensation of TCXO is also called DTCXO. Due to the adoption of digital technology, this type of crystal on the temperature characteristics reached a very high accuracy, and are able to adapt to a wider operating temperature range.

Main parameters of TCXO

Rated frequency: 97.536MHz 6.4MHz

Output waveform: sine wave

Spur: better than -75dBm is better than -75dBm

Daily aging rate: + 5E-9 + 1E-8

Fine tuning range: + 1E-6 + 2E-6

Temperature stability: + 2E-8 + 1E-8

Development trend of TCXO

High precision, low power consumption and small size, is still the research topic of TCXO. In miniaturization and chip, facing many difficulties, including the main there are two: one is small the quartz crystal oscillator frequency variable amplitude is smaller, so temperature compensation more difficult; the second is chip package in the reflux welding operation in, due to the welding temperature is much higher than that of TCXO maximum allowable temperature, can make a change in the frequency of the crystal oscillator, if not restricted to adopt local cooling cooling measures, it is difficult to TCXO frequency change control in + 0.5 x 10 - 6 below. However, the improvement of TCXO technology level is not into the limit, the content and potential of innovation is still large.

Application of TCXO

TCXO has a high frequency stability, and small size, can be quickly started in small current, its application field is expanded to mobile communication system, ground station and radio station, car phone and so on many aspects.