Voltage and current signaling

Details Voltage and current signaling Voltage and current signaling

2009-02-27

2011-12-13

Goodley, James E (Department: 2817)

Modulators

Frequency modulator

Including measuring or indicating

C332S124000, C702S064000, C324S522000, C323S234000

Reexamination Certificate

active

08076988

ABSTRACT:
Circuitry and methods are provided. Voltage and current of an electrical load are detected, scaled and biased to derive respective voltage and current signals. Frequency-modulated signals corresponding to the voltage and current signals are respectively derived. The frequency-modulated signals are communicated between different electrical domains by way of optical isolation barriers. The frequency-modulated signals are processed to improve linearity and to time-correlate the signals to discrete samplings of the load voltage and current. Control of a printer or other device is performed using the processed signals.

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patent: 7385453 (2008-06-01), Nervegna
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