Apparatus for detecting input signal

Details Apparatus for detecting input signal Apparatus for detecting input signal

1982-08-09

1985-05-28

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307356, 328162, 382 50, H03K 5153

Patent

active

045202800

ABSTRACT:
An input signal containing a base line which fluctuates to a great extent is detected or restored by comparing the input signal with reference levels which are shifted in accordance with the fluctuation of base line. The input signal is sampled at a variable sampling rate and an average of sampled values for a predetermined period is derived to produce a profile signal which resembles accurately the fluctuation of the base line. The profile signal thus obtained is added to upper and lower threshold voltages to produce the reference levels which have been corrected in accordance with the fluctuation of the base line of input signal.

REFERENCES:
patent: 3472958 (1969-10-01), Estock
patent: 3504289 (1970-03-01), Pfeiffer et al.
patent: 4132977 (1979-01-01), Nagano

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