Divide-by-Three Injection-Locked Frequency Dividers with Direct Forcing Signal
Figure 10
Locking regions for the divide-by-three ILFD in Figure 5, obtained by SPICE simulations (lines with circles) and by using analytical equations (lines without circles). For SPICE simulations, BSIM3 transistor models in MOSIS-IBM 8RF 0.13 technology with V have been used. (a) Locking range as a function of the input amplitude ( nH, Ω). (b) Locking range as a function of the transistor sizes (, nH, Ω). (c) Locking range as a function of the tank resistance (, ). (c) Locking range as a function of the ratio keeping the product constant ( nH 446.6 fF).
