Ask receiver with signal delay and stretching

Details Ask receiver with signal delay and stretching Ask receiver with signal delay and stretching

1993-03-25

1994-06-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

359181, H01J 4014

Patent

active

053191919

ABSTRACT:
An amplitude-shift-keyed (ASK) receiver is described for use in receiving infrared ASK modulated carrier signals wherein a delayed version of a demodulated pulse os compared with a stretched version and a dynamic threshold signal to reproduce binary data pulses. The dynamic threshold signal is further compared with the stretched version to derive an indication of the amplitude of the incident optical carrier. An embodiment illustrating use of the ASK receiver in an infrared communication system is described.

REFERENCES:
patent: 4431916 (1983-02-01), Couch
patent: 4507795 (1985-03-01), Wagner
patent: 4829560 (1989-05-01), Evanyk et al.
patent: 4860320 (1989-08-01), Hoffmann
patent: 4947407 (1990-08-01), Silvian
patent: 5016246 (1991-05-01), Wisniewski
patent: 5017794 (1991-05-01), Linwood et al.
patent: 5017885 (1991-05-01), Saleh
patent: 5075792 (1991-12-01), Brown
patent: 5077728 (1991-12-01), Kaminow

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