Data processing apparatus for receiving and decoding words in wh

Details Data processing apparatus for receiving and decoding words in wh Data processing apparatus for receiving and decoding words in wh

1979-11-14

1981-10-13

Springborn, Harvey E.

Boots, shoes, and leggings

G06F 305, G06F 500

Patent

active

042952077

ABSTRACT:
A data processing apparatus for receiving and processing coded words each word including, in succession, a reference bit, a start bit, data or command bits, a flag bit, a stop bit and a parity bit. The various bits are encoded within a corresponding number of bit periods by eighteen cycles of a 900 hertz signal. The start bit is reversed in phase with respect to the phase of the reference bit to represent a logic "0" and each of the additional bits is either reversed in phase or not reversed in phase with respect to the preceding bit thereby to represent a logic "0" or logic "1", respectively.
The data processing apparatus in accordance with the invention includes a microprocessor which performs multiple sampling and frequency comparison operations on each coded word to detect and lock onto the reference bit and then to detect the phase reversed start bit. The microprocessor then positions its internal timing so as to take samples of the coded word at the midpoints of the successive bit periods and to perform frequency comparison operations to detect phase reversals or lack of phase reversals and thereby determine the logic values of the other bits. The processing performed by the microprocessor tolerates slight frequency shifts and skewing of data.

REFERENCES:
patent: 2934746 (1960-04-01), Woo
patent: 3395396 (1968-07-01), Pasternak
patent: 3430208 (1969-02-01), Axelson
patent: 3482045 (1969-12-01), Chase
patent: 3967104 (1976-06-01), Brantingham

Affiliated with

Also associated with

Rating

Data processing apparatus for receiving and decoding words in wh does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data processing apparatus for receiving and decoding words in wh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data processing apparatus for receiving and decoding words in wh will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-934552