Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1996-10-17
1998-05-12
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
4552262, H04B 118
Patent
active
057521786
ABSTRACT:
A waveform identity discriminating circuit to discriminate the identity of two signal waveforms one of which is selected only for a very short period of time for discriminating the identity, wherein sample-and-hold circuits directly receive the selected input signals and sample each of the input signals in response to a sampling command and holds the sampled values, a discriminating circuit discriminates whether or not the waveforms of the input signals are identical by comparing the sampled values of the input signals held by the sample-and-hold circuits and a sampling timing detecting circuit monitors the frequency distribution pattern of the input signal and detects whether or not there are contained frequency components of a predetermined bandwidth by an amount at or above predetermined value, wherein the sampling timing of the sample and hold is controlled by the output of the sampling timing detecting circuit.
REFERENCES:
patent: 5193210 (1993-03-01), Nicholas et al.
patent: 5471662 (1995-11-01), Shiota
patent: 5551071 (1996-08-01), Nakano et al.
patent: 5640697 (1997-06-01), Orndorff
IBM Technical Disclosure Bullerin. "Measurement of Motor Time constant", by W.L. Lohmeier, Nov. 1971.
Eisenzopf Reinhard J.
Orgad Edan
Pioneer Electronic Corporation
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