Dedicated Q factor formulas stemming from oscillation frequency stability against source and load deviations

IEICE Electronics Express

Takashi Ohira¹ 

[1] Toyohashi University of Technology

关键词: oscillator;    stability;    pushing;    pulling;    Q factor;   

DOI  :  10.1587/elex.9.616

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(3)This paper derives two kinds of Q factor formulas for use in estimating frequency stability of sinusoidal oscillators. To cover various circuit topologies, we consider a general black-box model having DC input and RF output ports. Assuming a small deviation in DC supply voltage or RF load impedance, the frequency shift caused by such deviation is formulated by a perturbation technique. As a versatile criterion to indicate the tolerance of circuit itself, we introduce oscillator Q against each deviation. Since the theory is described in the linear impedance domain, it gives oscillator designers a clear vista on the stability of practical circuits.

【 授权许可】

Unknown