Patent ID: 7598821
Filing Date: 2009-10-06
Classification: H03B

Abstract:
1. An oscillator including an input terminal, an output terminal, a resonator, and an oscillator circuit including: first and second power supply terminals, two capacitors connected between the first power supply terminal and the input terminal, and respectively the output terminal of the oscillator, a first active transistor connected between the first power supply terminal and the output terminal, first means for polarising the first active transistor, a second active transistor, of complementary type to the first active transistor and whose current path is series connected with the first active transistor and forming therewith an inverting amplifier, second means for polarising the second active transistor, a first current source formed by a transistor of the same type as the second active transistor, between the second power supply terminal and the second active transistor, current control means for the second polarising means, wherein in steady operating conditions, said second polarising means are arranged for providing a polarisation voltage across the gate of the second active transistor corresponding to the transistor gate voltage of the first current source to within one voltage shift.