| 摘要 |
<p>An apparatus eliminates a differential phase shift, Deltatheta (f ), between a double sideband suppressed carrier modulated angular rate information signal (24) and its sinusoidal demodulation reference signal (38) in a gyroscope angular rate sensing circuit including a signal reference source. The apparatus includes a demodulator (34), a phase shifter (50) in a demodulation reference signal path, the demodulation reference signal path being between the signal reference source and the demodulator. The phase shifter is configured to adjust a phase of the sinusoidal demodulation reference signal. A phase locked loop (PLL) (35) includes a phase detector (62), a servo equalizer (72), and a dual-frequency, numerically controlled oscillator (76). The PLL is configured to provide a demodulation signal based on the phase shifted demodulation reference signal, and a phase shift command source (56) is configured to provide an input to the phase shifter to command an appropriate phase adjustment.</p> |
