SU834906A1 - Code converter - Google Patents

Description

(54) CODE CONVERTER

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The invention relates to automation and computing and is intended to convert an equilibrium code from a decimal number system to an octal number with an arbitrary conversion law.

A combinational converter of a multi-bit code of one type into a code of another type is known, containing unit and tens converters and adders of units, tens and hundreds.

However, in converters of units and tens, all code combinations of the converted code are subjected to conversion, which complicates the equipment and increases the number of elements.

A code converter is also known, which contains in each decade a serially connected deisfrator and encoder, the decoder inputs connected to the input buses, as well as an additional additional encoder common to all decades, the inputs of which are connected to the high-end output buses .2l.

However, this device is complex and contains a large number of elements.

The purpose of the invention is to simplify the conversion functions and increase the reliability.

The goal is achieved by the fact that in each decade, in series from each decimal numbering system into octal number, serially connected decoder and encoder, with inputs

0 decoder connected to the input tires, as well as a common for all decades, additional encoder, the outputs of which are connected to the output tires of the higher bits, in each decade

5, the OR element and the switch are introduced in two directions, the first information inputs of which are connected to the encoder outputs, the second information inputs of the switch are combined in bits to the decoder inputs, the forward and inverse control inputs of the switch are combined and connected to the output of the OR element of this decade, both whose inputs are connected to the outputs of the decoder of the specified decade, as well as the OR element common to all decades, and the inputs of the common element OR are connected to the outputs of the elements OR of all decades, and the output of the common element OR is connected to the input of an additional encoder, the outputs of the switches are connected to the output buses of the lower bits.

The drawing shows a functional diagram of the proposed device.

 Combinational converter has as far as decades. The first decade is determined by the input tires 1-5, the second - by the input tires 6-10. Each decade contains a decoder 11, an encoder 12, a switch 13 in two directions and an element. OR 14. In addition, a common element OR 15, an additional encoder 16 and output buses are included in the converter.

The device works as follows.

The input busbars 1-5 and 6-10 are affected by the equilibrium code of the decimal number system. If his code combinations in all decades correspond to the numbers O - 7, then they without conversion pass through the open second direction of the switches 13 to the output buses 17-21 and 22-26, since there are no signals from the OR 14 elements on the control inputs of the switches, and the first direction is closed. At the same time, the output of the common element OR 15 of the signal is also not-t and the additional encoder 16 excites, at the output buses 27-31, the code combination of the digit O in the equilibrium code. If there is a code combination of the digit 8 in any decade in the code to be converted. (or 9), respectively, the first (or second) output of the decoder 11 of this decade is excited, a signal appears at the output of the element OR 14, the first opens and the second direction of the switch 13 closes, the code digit O appears at the outputs of the encoder 12 ( or 1) in the equilibrium code, which, through the open first direction of the switch, excites output buses 1721 (or 22-26). At the output of the common element OR 15, a signal appears and the additional encoder 16 excites the code combination of digit 1 in output buses 2731 equilibrium co de. .

Thus, on the output buses 17-31, code combinations of O-7 only are possible, which corresponds to the octal number system, since only two digits out of ten possible decimal numbers, decoders 11 are subjected to decryption and encryption. and the encoders 12 and 16 are fairly simple and are implemented on a small number of Q elements i

Formula inventions

The converter code from the decimal number system into the octal one, containing in each decade serially connected decoder and encoder, the decoder inputs connected to the input buses, as well as the additional encoder common to all decades, the outputs of which are connected to the output high-order tires, differing from that in order to simplify and enhance

5 reliability, in each decade, an OR element and a switch for two directions are introduced, the first information inputs of which are connected to the outputs of the encoder, the second information inputs

Q switches are connected in series with the inputs of the decoder, the direct and inverse control inputs of the switch are combined and connected

to the output of the OR element of this decade, both of whose inputs are connected to the outputs of the decoder of the decade mentioned, as well as the OR element common to all decades, and the inputs of the common OR element are connected to the outputs of the OR elements of all decades, and the output of the common element OR is connected to the input of the additional encoder , the outputs of the commutator are connected to the output junior tires.

Information sources,

5 taken into account in the examination

1, USSR Author's Certificate No. 217708, cl. G 06 F 5/02,

. 17.04.67.

2, USSR author's certificate

0 595859, Cl, H 03 K 13/243, 19,07,76 Xprotype),

Claims (1)

Claim A code converter from a decimal to octal number system, containing a decryptor and an encoder in each decade, moreover, the decoder inputs are connected to the input buses, and there is also an additional encoder common to all decades, the outputs of which are connected to the output bits of the senior digits, characterized in that, in order to simplify and increase 25 reliability, an OR element and a two-way switch are introduced into each decade, the first information inputs of which are connected to the outputs of the encoder, the second inform switch inputs 30 are connected bitwise with decoder inputs, direct and inverse. switch control inputs are combined and connected ⁹ to the output of the OR element of the given decade, □ both inputs of which are connected to the outputs of the decoder of the indicated decade, as well as a common OR element for all decades, the inputs of the common OR element are connected to the outputs of the OR elements of all decades, and the output of the common OR element 40 is connected to the input of an additional encoder, the outputs of the switches are connected to the output buses of the lower digits.