Method and apparatus for correcting errors in an amplitude encoded signal
Patent 5463393 Issued on October 31, 1995. Estimated Expiration Date: 
May 13, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 13, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2467646 3619770 3631469 3786459 3808560 Apparatus to measure the eccentricity of a shaft Digital resolver-tracking loop Sequentially balanced modulation tone ranging system and method Rotational position detecting apparatus System of analysis by visual display of the vibratory movements of a rotary machine InventorAssigneeApplicationNo. 243549 filed on 05/13/1994US Classes:341/115Converter compensationExaminersPrimary: Young, BrianAttorney, Agent or FirmInternational ClassesH03M 001/48H03M 001/64 AbstractA method and apparatus for determining the nature of an error in an amplitude encoded periodic signal and for compensating for such errors. The method includes receiving two such amplitude encoded periodic signals, each periodic signal having a sinusoidal amplitude component signal, the sinusoidal amplitude component signals being quadrature related. The method further includes squaring the two quadrature related sinusoidal amplitude component signals, summing the squared signals, and utilizing the sum signal to compensate at least one of the two sinusoidal amplitude component signals. The sum signal can be manually or automatically monitored. The sum signal can be displayed on an oscilloscope display device and at least one of the amplitude component signals compensated so as to reduce the error signal by providing a compensation signal to at least one amplitude component signal so as to obtain a substantially constant value display of the sum signal.Field of SearchConverter compensationPHASE OR TIME OF PHASE CHANGE Synchro or resolver signal Coarse and fine Control system Analog resolver or synchro signal to digital signal Digital signal to analog resolver or synchro signal Digital or numerical systems Pulse-counting systems Synchro or resolver (e.g., transmitter simulators) Phase comparison | |
