[14p-P5-1~9] 1.6 Ultrasonics

[14p-P5-5] Variation of phase noise for feedback branch Q of Colpitts crystal oscillators

Keisuke Nabuchi¹, Takayuki Sato¹, 〇Yasuaki Watanabe¹ (1.Tokyo Metro. Univ.)

Keywords:Quartz crystal, feedback branch, Q

The phase noise in the broadband noise based on feedback branch Q is demanded experimentally.
It is shown that phase noises decreases as the whole oscillation loop by applying the ceramic of high Q.
A Q was lowered by adding resistance R for the ceramic in parallel, and it was confirmed that the phase noise increased.