A Compact 0203-V Inverse-Class-F 23 Oscillator for Low 1 f 3 Noise Over Wide Tu

Abstract

We introduce a new mode of oscillation in an LC- tank: an inverse class-F 23. In contrast to the conventional class-F oscillators, in which a high value of the real impedance (i.e., resistance) is presented to the third (in class-F 3) or/and to the sec- ond (in class-F 2/class-F23) oscillator harmonics via an auxiliary resonance, here low resistive impedances (resembling a non-ideal short) are presented at both the second and third harmonics. This is made possible by tight magnetic coupling in t