Voltage-controlled oscillators and related systems

摘要

Apparatus are provided for voltage-controlled oscillators and related systems. An exemplary voltage-controlled oscillator includes an active-circuit arrangement that facilitates generation of an oscillating signal, and a resonator arrangement capacitively coupled to the active-circuit arrangement to influence an oscillation frequency of the oscillating signal based on a difference between a first control voltage and a second control voltage.

主权项

1. A voltage-controlled oscillator comprising:
a first voltage node to receive a first voltage; a second voltage node to receive a second voltage; a third voltage node to receive a third voltage; an active-circuit arrangement facilitating generation of a first oscillating signal at a first output node and a second oscillating signal at a second output node, the active-circuit arrangement comprising:
a first field-effect transistor having a first drain terminal connected to the first output node, a first gate terminal connected to the second output node, and a first source terminal; anda second field-effect transistor having a second drain terminal connected to the first gate terminal at the second output node, a second gate terminal connected to the first drain terminal at the first output node, and a second source terminal connected to the first source terminal; a resonator arrangement coupled to the first voltage node and the second voltage node to influence an oscillation frequency for the first oscillating signal and the second oscillating signal based on a difference between the first voltage and the second voltage, the resonator arrangement including a first inductive element coupled between the second voltage node and a first node and a second inductive element coupled between the second voltage node and a second node; a first capacitive element configured electrically in series between the first output node and the resonator arrangement; a second capacitive element configured electrically in series between the second output node and the resonator arrangement; a third inductive element connected between the first output node and the third voltage node; and a fourth inductive element connected between the second output node and the third voltage node, wherein:
the resonator arrangement is capacitively coupled to the active-circuit arrangement via the first capacitive element and the second capacitive element;each of the first capacitive element and the second capacitive element has a low impedance at the oscillation frequency; andthe third inductive element and the fourth inductive element are effectively open circuits at the oscillation frequency.