Patent ID: 6943637

Claim:
A voltage controlled oscillator circuit particularly for a low power electronic device, the oscillator circuit including: a resonant circuit provided with at least one inductive element and a capacitive element whose capacitive value varies as a function of a control voltage applied across a capacitive element to adjust the frequency of two oscillating signals in phase opposition which are respectively supplied by a first and a second output terminals of the resonant circuit, at least one pair of cross-coupled transistors, which is connected to the resonant circuit to compensate for the resonant circuit losses, the transistors each including a control terminal and a first and second current terminals, the first current terminal of the first transistor or respectively of the second transistor being connected to the first output terminal or respectively the second output terminal of the resonant circuit, whereas the control terminal of each transistor is connected via a coupling capacitor to the first current terminal of the other transistor, wherein each transistor of the pair is connected in parallel to a diode mounted transistor, through which a current, supplied by a current source passes, each transistor of the pair and the corresponding diode mounted transistor forming a current mirror to impose a mean current on the resonant circuit so as to supply oscillating signals at a maximum amplitude depending on the sizing of certain elements of said circuit.