SU780202A1 - Scaling device - Google Patents

Description

(54) RECORDING DEVICE

one

The invention relates to the field of automation and computer technology, in particular to digital software control systems.

A device l is known that contains a reversible counter, a counter zero decoder, an NTDrung trigger, a sign trigger, HjIH elements, delays, AND, the disadvantage of which is the low speed determined by the delay element.

The closest to this technical solution is the device 2, which contains a reversible counter, a counter zero decoder, an inverter, four two-input and two three-input AND elements, two OR elements, a sign trigger. The disadvantage of this device is the insufficiently high speed, which is determined by the delay introduced by the sign trigger.

The aim of the invention is to improve the speed of the device.

The goal is achieved by the fact that in a device containing a reversible counter, a multi-input element OR, two two-input and two three-input elements AND, two elements OR, a trigger

mark, summing and subtracting inputs of the device are connected respectively with the first inputs of two-input and three-input elements And, outputs

S first connected to the S and R inputs of the sign trigger, respectively, the unit and zero outputs of which are connected to the second inputs of the three-input AND elements, the third inputs of which are connected to the output of the multiple input OR element, and the outputs to the inputs of the first OR element whose output is connected to the subtracting input a reversible counter, the summing input of which is connected to the output of the second element OR, and the single outputs to the inputs of the multi-input element OR, introduced two AND-NOT elements, the first inputs of which are connected

20 with the output of the multi-input element OR, the second inputs - with single and zero outputs of the sign trigger, and the outputs respectively, with the second inputs of the two-input elements AND, the outputs of which are connected to the inputs of the second element OR.

The drawing shows a functional diagram of the proposed scaling device 30.

The scaling device contains a eversive counter 1, a multi-input element OR 2, elements OF, 4, 5 and b, elements OR 7 and 8, a sign trigger, 9, as well as elements AND-NOT 10 and 11.

The counting device works as follows. .

The first counting device counts the difference between the number of pulses arriving at inputs 12 and. 13 devices. In this case, the reversible counter 1 records the modulus of the number, the sign of the number is determined by the state of the sign trigger 9.

The state of the reversible counter 1 changes after the end of the pulse at its summing or subtracting inputs.

Let us assume the initial zero state of the reversible counter 1. Signals JQ s logical zero (0 from the outputs of the eversive counter 1 arrive at the inputs of the multiple element OR 2, the signal O, at the output of the counter, prevents pulses from the inputs 12 and 13 of the device through the elements AND 5 and 6 to the subtracting input of the reversible counter 1. In addition, the logical unit (1) signals appear at the outputs of the AND-HE elements 10 and 11 regardless of the state of the sign trigger 30 9. These signals allow the pulses to pass from the inputs 12 and 13 of the device accordingly The elements I3 and 4 on the S and ft are the inputs of the sign trigger 9. The pulses from the outputs of the elements 35 and 3 and 4 also go through the element OR 7 to the summing input of the counter.Thus, at the zero state of the reversing counter, 1 pulse at the inputs 12 and 13 of the device Q installs the trigger of sign 9, respectively, in a single or zero state and, in addition, writes a one in the reversible counter CHICK 1.

Signal 1 at any output of the reversible counter 1 (the non-zero state of the counter) passes to the output of the multi-input element OR 2 and removes the prohibition on the inputs of elements 5 and 6, as well as elements AND – NO 50 and 11. As a result, the sign trigger 9 controls the connection of the summer. and the readout inputs of the reversible counter 1 to the inputs 12 or 13 of the device, depending on the state 55 of the trigger. For example, in the zero state of the 9 sign trigger, the signal O of the single output prohibits the passage through the AND element, and passing through the AND-NOT element 10, permits .Q to pass through the AND 4 element.

780202

pulses from the input 13 of the device. Signal 1 at the zero output of the sign trigger 9 allows passage through the element AND 5, and, having passed the element AND-NOT 11, prohibits the passage through the element AND 3 pulses from the input 12 of the device. Therefore, the pulses from the input 12 of the device through the elements AND 5 and OR 8 arrive at the subtracting input of the reversible counter 1, and the pulses from the input 13 of the device through the elements AND 4 and OR 7 arrive at the summing input of the counter. Introduction to the scaling device of two IS-NOT elements, as well as new connections between the elements allows, in comparison with the known technical solution, to exclude the effect of the sign trigger output when switching to the pulse passing circuit on the summing input of the reversible counter, and thereby increase the speed devices. ,

Inventory a

Scaling device containing reversible counter, multi-input element OR, two two-input and two three-input elements AND, two elements OR, sign trigger, summing and subtracting inputs of the device are connected to the first inputs of two-input and three-input elements And, the outputs of the first connected to S and R inputs the sign trigger, respectively, the unit and the zero outputs of which are connected to the second inputs of the three-input elements AND, the third inputs of which are connected to the output of the multi-input element OR, and the outputs to the input The first OR element, the output of which is connected by the subtracting input of a reversible counter, the summing input of which is connected to the output of the second OR element, and the single outputs to the inputs of the OR multi-input element, characterized in that, in order to increase speed, two AND-NOT elements are introduced the first inputs of which are connected to the input of the multi-input ele ment. ment OR, the second inputs - with single and zero outputs of the sign trigger, and the outputs - respectively with the second inputs of the two-input AND elements, the output of which is connected to the input mi of the second element OR.

Sources of information taken into account in the examination

1. Author's certificate of the USSR 550767, cl. H 03 K 23/00, 1975.

2. USSR author's certificate number 433643, cl. H 03 K 23/00, 1973.

Claims (1)

A counting device containing a reversible counter, a multi-input OR element, two two-input and two three-input AND elements, two OR elements, a sign trigger, summing and subtracting device inputs are connected respectively to the first inputs of two-input and three-input elements AND, the outputs of the first are connected to s and R inputs of the sign trigger 35, respectively, the unit and zero outputs of which are connected to the second inputs of the three-input elements AND, the third inputs of which are connected to the output of the multi-input element OR, 40 and the outputs to the input the ladies of the first OR element, the output of which is connected ^; with a subtracting input of a reversible counter, the summing input of which is connected to the output of the second OR element, and the individual outputs are connected to the inputs of a lot of ³ input OR elements, characterized in that, in order to improve performance, two NAND elements are introduced, the first inputs of which are connected with the output of the multi-input OR element 50, the second inputs with the single and zero outputs of the sign trigger, and the outputs, respectively, with the second inputs of the two-input AND elements, the outputs of which are connected to the inputs 55 of the second OR element.