Communications: electrical – Continuously variable indicating – With meter reading
Patent
1990-02-14
1992-06-16
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
340825200, 341 22, 341 26, H04Q 900
Patent
active
051227932
ABSTRACT:
A signal generator for generating an output signal that is an accurate image of an input signal. A keyboard transmits an input signal and an image controlling device receives the input signal. The image controlling device includes a level variation detecting device which samples the input signal at a sampling rate determined by a sampling period generating device. When the level variation detecting device detects a variation in the levels of a currently sampled value and a previously sampled value it adjusts the image signal accordingly so that the output signal is an accurate image of the input signal. A synchronization signal transmitter transmits a synchronization signal to the keyboard. The keyboard includes a counter which counts the synchronization signal. The counter generates the input image signal that is transmitted to the image controlling device. The synchronization signal transmitter provides synchronization between the image signal and the sampling device so that level variations in the input signal are designed to change in synchronization with the sampling rate. Accordingly, the level variation detecting device can detect any level variations in the input signal accurately.
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"Backup Application Technique", published Nov. 15, 1985, Radio Life.
Holloway III Edwin C.
NEC Home Electronics Ltd.
Yusko Donald J.
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