Programmable data envelope detector

Details Programmable data envelope detector Programmable data envelope detector

1976-09-27

1977-10-11

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92PE, 235 92DP, 235 92FQ, 235 92CA, 235 92R, 360 40, G06M 302

Patent

active

040537382

ABSTRACT:
A programmable data envelope detector indicates the presence of phase encoded data being transmitted to or received from a data storage medium. The detector generates an output signal at a predetermined time after detecting the presence of data and continues to provide such output signal for a predetermined time after detecting the end of data. The detector comprises a data pulse detector, three-count up-down counter, two multicount four-bit up-down counters, a microprogrammable control store and decoder, a compare circuit, and a latch circuit. The time periods at which the latch circuit generates the output signal are different depending upon the nature of the data transfer operation, such time periods corresponding to different microinstructions in the control store.

REFERENCES:
patent: 3581066 (1971-05-01), Maure et al.
patent: 3714645 (1973-01-01), Sivertson
patent: 3824378 (1974-07-01), Johnson et al.
patent: 3956616 (1976-05-01), Knollenberg
patent: 3981440 (1976-09-01), Richardson

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