A circuit , comprising: an inertial measurement unit configured to be oscillated via a driving signal (D + , D - , Dsq) produced by driving circuitry , and a lock-in amplifier receiving a sensing signal (S + , S - , Ssq) from the inertial measurement unit as well as a reference demodulation signal which is a function of the driving signal (D + , D - , Dsq) , wherein the lock-in amplifier is configured to produce an inertial measurement signal (Vout) based on the sensing signal (S+, S - , Ssq) from the inertial measurement unit and the reference demodulation signal, wherein the reference demodulation signal is affected by a variable phase error, characterized by further comprising: phase meter circuitry configured to receive the driving signal (D + , D - , Dsq) and the sensing signal (S+, S - , Ssq) and produce, as a function of the phase difference ( ΔΦds ) between the driving signal (D + , D - , Dsq) and the sensing signal (S + , S - , S sq ) , a phase correction signal for the reference demodulation signal of the lock-in amplifier , and a correction node configured to apply the phase correction signal to the reference demodulation signal of the lock-in amplifier wherein, in response to the phase correction signal being applied to the reference demodulation signal of the lock-in amplifier said phase error is maintained in the vicinity of a reference value ( Φer0 ) . an inertial measurement unit configured to be oscillated via a driving signal (D + , D - , Dsq) produced by driving circuitry , and a lock-in amplifier receiving a sensing signal (S + , S - , Ssq) from the inertial measurement unit as well as a reference demodulation signal which is a function of the driving signal (D + , D - , Dsq) , wherein the lock-in amplifier is configured to produce an inertial measurement signal (Vout) based on the sensing signal (S+, S - , Ssq) from the inertial measurement unit and the reference demodulation signal, wherein the reference demodulation signal is affected by a variable phase error, characterized by further comprising: phase meter circuitry configured to receive the driving signal (D + , D - , Dsq) and the sensing signal (S+, S - , Ssq) and produce, as a function of the phase difference ( ΔΦds ) between the driving signal (D + , D - , Dsq) and the sensing signal (S + , S - , S sq ) , a phase correction signal for the reference demodulation signal of the lock-in amplifier , and a correction node configured to apply the phase correction signal to the reference demodulation signal of the lock-in amplifier wherein, in response to the phase correction signal being applied to the reference demodulation signal of the lock-in amplifier said phase error is maintained in the vicinity of a reference value ( Φer0 ) . phase meter circuitry configured to receive the driving signal (D + , D - , Dsq) and the sensing signal (S+, S - , Ssq) and produce, as a function of the phase difference ( ΔΦds ) between the driving signal (D + , D - , Dsq) and the sensing signal (S + , S - , S sq ) , a phase correction signal for the reference demodulation signal of the lock-in amplifier , and a correction node configured to apply the phase correction signal to the reference demodulation signal of the lock-in amplifier wherein, in response to the phase correction signal being applied to the reference demodulation signal of the lock-in amplifier said phase error is maintained in the vicinity of a reference value ( Φer0 ) . <EOS>