Low phase noise crystal oscillators play a key role in high-precision instrumentation, radio positioning, high-speed target tracking, radar detection, microwave communication and wireless communication applications. In particular, modern communication systems require higher selectivity and sensitivity of receivers, so the phase noise requirements of local oscillators (LO) are becoming more and more stringent, which affects not only the bit error rate and carrier frequency tracking accuracy, but also the in-band and out-band performance of the communication receivers.

For these key applications, Dapu has recently launched several ultra-low phase noise OCXOs, which achieve ultra-high Q values from the crystal design and ensure low close-in phase noise within 100Hz offset. Through the selection of peripheral circuits (including IC), ensure low phase noise between 100Hz to 1MHz offset. Meanwhile the output drive circuit parameters are accurately controlled to ensure low phase noise at the far end.