Differential voltage controlled oscillator for phase locked loop, has four differential pairs including pair of MOS transistors, where transistor pair of each differential pair is fabricated in same housing and share common source or drain

摘要

The circuit has four differential pairs (61-64) including pairs of MOS transistors (611, 612, 621, 622, 631, 632, 641, 642), where transistors of each differential pair are fabricated in same housing. The transistors (611, 612) include respective source and drain. The transistor pair of each differential pair shares common source or common drain (614, 624, 634, 644).