Yu Hongyu, Lee Chuang-yuan, Pang Wei, Zhang Hao, Brannon Alan, Kitching John, Kim Eun Sok
IEEE Trans Ultrason Ferroelectr Freq Control. 2009 Feb;56(2):400-3. doi: 10.1109/TUFFC.2009.1050.
We have designed and built 2 oscillators at 1.2 and 3.6 GHz based on high-overtone bulk acoustic resonators (HBARs) for application in chip-scale atomic clocks (CSACs). The measured phase noise of the 3.6 GHz oscillator is -67 dBc/Hz at 300 Hz offset and -100 dBc/Hz at 10 kHz offset. The Allan deviation of the free-running oscillator is 1.5 x 10(-9) at one second integration time and the power consumption is 3.2 mW. The low phase noise allows the oscillator to be locked to a CSAC physics package without significantly degrading the clock performance.
我们基于高泛音体声波谐振器（HBAR）设计并制造了两款分别为1.2 GHz和3.6 GHz的振荡器，用于芯片级原子钟（CSAC）。3.6 GHz振荡器在300 Hz频偏处的实测相位噪声为-67 dBc/Hz，在10 kHz频偏处为-100 dBc/Hz。自由运行振荡器在1秒积分时间的阿伦偏差为1.5×10⁻⁹，功耗为3.2 mW。低相位噪声使得该振荡器能够锁定到CSAC物理封装，而不会显著降低时钟性能。
