Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Reexamination Certificate
2006-09-29
2008-11-18
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
C318S696000
Reexamination Certificate
active
07453230
ABSTRACT:
The circuit comprises a pulse width modulated (PWM) input signal, a resistor, an instrumentation amplifier, a filter and an analog to digital converter. The method of performing synchronization comprises sampling an analog signal and forming a digital data stream representing the signal, filtering the data stream to remove harmonics, measuring an approximate level of ripple in the data stream, detecting a change in the level of ripple, and based upon change in the level of ripple, determining if a stall has occurred.
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Cypress Semiconductor Corp.
Donovan Lincoln
Paul Antony M.
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