Patent ID: 7296468

Claim:
A system containing a plurality of gyroscopes, each gyroscope operating at a different natural frequency (ω R ), each gyroscope in the system comprising: a mixer receiving output signals from a gyroscope at the natural frequency of operation (ω R ) and reference signals at a frequency (ω LO ) that is the sum of the natural frequency of operation ω R ) of the gyroscope and a predetermined operating frequency for the system, the mixer combining the signals from the gyroscope (ω R ) with the reference signals ω LO to form a signal (ω IF ) having a (ω LO +ω R ) and a (ω LO −ω R ) component; a filter receiving the components of the signal (ω IF ) and removing the (ω LO +ω R ) component leaving the (ω LO −ω R ) component signals at the predetermined operating frequency for the system; a phase lock loop receiving a system clock signal and the (ω LO −ω R ) component signals and generating the reference signals at a frequency (ω LO ); and a data processor receiving the (ω LO −ω R ) component signals from the filter at the operating frequency of the system and processing the received signals at the system operating frequency to generate a directional signal.