Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1989-01-30
1990-07-10
Brinich, Stephen
Facsimile and static presentation processing
Facsimile
Recording apparatus
358172, H04N 314
Patent
active
049410512
ABSTRACT:
A signal processing circuit for processing in real time output signals from a radiation sensing assembly which generates for successive sampling periods output signals representing respectively a reference level and a radiation level related to the radiation incident on a sensor of the assembly during each sampling period. The circuit comprises a low pass filter for receiving the output signals and for filtering a plurality of reference level signals and a corresponding plurality of radiation level signals associated with the plurality of reference level signals to minimize high frequency noise effects on the signals and to generate filtered and averaged reference level and radiation level signals; and a difference circuit for generating a signal related to the difference between the filtered reference level and filtered radiation level signals.
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Brinich Stephen
Crossfield Electronics Limited
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