Browse Prior Art Database

Decoding System

IP.com Disclosure Number: IPCOM000097126D
Original Publication Date: 1962-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Dieffenderfer, JW: AUTHOR [+3]

Abstract

A decoding system employing a special code and providing time-base analog output signals is realized. Any whole number can be expressed in a special code so that positive numbers are represented by a pair or pairs of ones. The following table indicates how the decimal numbers 1...

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Decoding System

A decoding system employing a special code and providing time-base analog output signals is realized. Any whole number can be expressed in a special code so that positive numbers are represented by a pair or pairs of ones. The following table indicates how the decimal numbers 1... 12 are coded: Bit Positions 1 2 3 4 5 6

Bit Values -1 +2 -3 +5 -8 +13

1 1 1 0 0 0 0

2 0 0 1 1 0 0

3 1 1 1 1 0 0

4 1 0 0 1 0 0

5 0 0 0 0 0 0

6 1 1 0 0 1 1

7 0 0 1 1 1 1

8 1 1 1 1 1 1

9 1 0 0 1 1 1

10 0 0 1 0 0 1

11 1 1 1 0 0 1

12 1 0 0 0 0 1

In the decimal decoding system, the bit positions are combined with timing signals or bit gates corresponding to the bit values in And's 10... 15. The outputs of And's 10... 12, representing the bit values having a negative sense, pass through Or 16 and turn on latch 17. Latch 17 is turned off by the outputs of And's 13... 15 which pass through Or 18. Examples of the resultant output signals for the digital numbers 3 and 9 are shown. Latch 17 is in one of its stable states for a number of bit gate times over a selected time interval, the sum of which is equivalent to the whole number represented by the coded input signal.

In another arrangement, the bit positions of the Coded signals are not associated with a fixed polarity sense. The bit positions correspond to bit values of 1, 2, 4, 8, 16...2n so that any whole number is defined by a pair or pairs of these bit positions. An And is associated with and combines each coded input signal...