Patent ID: 8040190

Claim:
A phase-locked loop device, comprising: a variable oscillator connected to a first resonator, said oscillator being able to deliver an output signal at a first output frequency Fout 1 , a first frequency divider receiving said output signal and able to convert it into a divided frequency signal Fout 1 /n, a frequency reference generator connected to a second reference resonator, delivering a reference signal at a low reference frequency Fref, said second reference resonator simultaneously implements both a real time clock signal, with which to generate a time base having an electrical dissipation lower than a microampere, and said frequency reference generator to generate the first output frequency Fout 1 having a signal over noise ratio for a radio frequency carrier, a phase comparator measuring the phase error between the divided frequency signal Fout 1 /n and the reference signal and being able to produce a test signal, a low-pass filter or an integrating circuit able to filter the test signal and able to generate a voltage or a control word designed to control the voltage-controlled or digitally controlled variable oscillator, wherein said reference frequency Fref is between 10 kHz and 2 MHz, said first resonator is an acoustic wave piezoelectric resonator, and the low-pass filter is provided with a bandwidth lower than 100 Hz.