SU1252778A2 - Device for determining the most significant digit position - Google Patents

Abstract

The invention relates to computing and can be used in digital computing devices. The circuit of the invention is an extension of the class of tasks by transforming the direct code into an additional code of a number. The device contains an n-bit register 1, elements AND-NOT 2 ,, 2, ..., 2.,, And 3, ,,, .., 3 „-,, elements NOT 4 ,,. Outputs 5 ,, devices, elements OR 6,, 6,.,., 6.,, elements AND 7 ,, 7,. . ., 7 ". , output tires 8,, 82, ..., 8 devices. In the device, along with the mode of selecting the most significant digit, it is possible to convert a direct code of a number into an additional one. 1 il. 8, Nd LH X) N)

Description

The invention relates to computing, can be used in digital computing devices. 1x and is an enhancement of the device according to the main auth. No. 723573.

The purpose of ibooter1P1 is to expand the class of problems to be solved by providing the possibility of converting an n-bit (n is the number of the supply) of the direct code into an additional one.

The drawing shows the functional diagram of the device.

The device contains n-bit dngy register 1, elements AND-NOT 2 ,, ..., 2 „, ,, elements AND 3,

n i

four, , . . . , 4 „.J, exits 5,,. . . , 5 devices, elements OR 6, ..., 6, elements AND 7,. . . , 7 ,,.,, Outs 8,,. . . 8p devices.

The device works as follows.

There are two possible modes of operation of the device; highlighting the most significant | space and converting the direct code of a number to an additional one.

In the first case, the analyzed code is written to register 1 (the low-order bit from the bottom of the drawing). The circuit distributes the potentials in such a way that the unit of the most significant bit, extending to the significant lower bits, prohibits the passage of signals of significant digits to the outputs of the falling bits of the device, regardless of what value is written within the limits of the size. A signal equal to one will be at the output of the bus whose number corresponds to the register register 1, in which the highest unit of the analyzed code is recorded. On all other tires, 5 must be O regardless of the state of the other bits in the register.

It is known that in order to convert a direct code of a number into an additional one, it is necessary to select the lowest unit of the code to be converted, leave it unchanged, and in all remaining higher bits 1, replace O and O with I.

Accordingly, in the second case, the code to be converted is written to register 1 so that the high bit is at the top (as per the drawing). The device distributes potentials in such a way that the unit of the youngest

The bit distributed through the chain of 1 AND-NOT 2 and NOT 4 points forbids the passage of signals of significant digits at the output S of the higher bits (5.5 output of the higher bit) regardless of what number is recorded within the limits of the bit. A signal equal to one will be at that output 5, the number of which corresponds to the discharge

10 register 1 in which the unit of the converted code is written. At all other outputs, 5 must be 0, regardless of the state of the other bits of the register. In addition, one, spread through the chain

elements of NOT elements AND-NOT 2 and NOT A, give permission to NL one inputs of elements AND 7, flpyrvfe whose inputs are connected to the inverse outputs of the higher bits of the register.

Thus, the inverse code of the most significant bits before the bit, in which the younger unit itself is written, through open elements

25 and 7 and Ш1И 6 arrives at the outputs 8 Oh - the output of the highest bit of the complementary code of the number being converted).

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Claims (1)

Invention Formula Device for determining the most significant bit of the auth.St. No. 723573, about aphids, so that, in order to expand the class of problems solved by providing the possibility of converting an n-bit (n - the number of the number) of the time code into an additional one, (n-1) element is entered into it STO and an additional group of (n-1) elements AND, the first input of the K-th element AND (, ..., p-1) of an additional group of 1SHs is connected to the 45th inverse output K + 1) of the n-th type register , the second input of the g-th element AND (, ..., p-1) of the additional group is connected to the output (ml) -ro of the element NAND, the output of the K-th; 1 element And the additional group is connected to the first in the K – i element of the 1i1I, the output of which is one and: additional outputs of the device, the direct output of the first series of a p-bit register is connected to the second input of the first element MCTiT.-j and L.p. main entrance, second entrance to the K-I D tIlmenta I.GTI ttkodklyuchen to ryhg) do K-1-0 e.gtementa I. 50 55 Invention Formula Device for determining the most significant bit of the auth.St. No. 723573, about aphids, so that, in order to expand the class of problems solved by providing the possibility of converting an n-bit (n - the number of the number) of the time code into an additional one, (n-1) element is entered into it STO and an additional group of (n-1) elements AND, the first input of the K-th element AND (, ..., p-1) of an additional group 1SH is connected to the inverse output K + 1) of the n-th type register, the second input of the g-th element AND (, ..., p-1) of the additional group is connected to the output (ml) -ro of the element NAND, the output of the K-th; 1 element of the additional group is connected to the first input To do 1i1I th element, whose output is one and: additional output device, a direct output of the first series ra n-bit register connected to a second input of the first element CTiT.-j and l.po. main entrance, second entrance to the K-I D tIlmenta I.GTI ttkodklyuchen to ryhg) do K-1-0 e.gtementa I.