SU1244663A1 - Device for calculating value of tangent - Google Patents

Abstract

The device relates to the field of automation, computer technology and can be used in automatic control and monitoring systems, in particular in digital linearizing devices, as well as in hardware implementations of mathematical tools for electronic computer. The purpose of the invention is to improve the fidelity of the function of the tgx. The purpose of the invention is achieved in that a combinational multiplier, an adder, accumulations of an adder, a multiplier of the quality of pulses by two are added to the device containing the counter. 1 il. (L N9 U 4ik Aud Aud

Description

The invention relates to automation, computer technology and can be used in automatic control and monitoring systems, in particular in digital linearizing devices, as well as in hardware implementations of mathematical tools for digital computers.

The purpose of the invention is to improve accuracy.

The drawing shows a block diagram of the device.

The device contains a counter 1, a combination quad with 2 first 3 and second 4 groups of inputs, a combinational adder 5 with the first 6 and second 7 groups of inputs, accumulating adder 8, multiplier 9 number of pulses by two.

The device works as follows.

In the initial state, the accumulating adder 8 is in the single state, counter 1 is in the zero state. The increment dx of the input pulse sequence X arriving at the input causes an overflow of the accumulating adder 8 at the output dy of the pulse sequence y and forms in counter 1 the current value of the number y, which is fed to the first 3 and. the second 4 groups of inputs of the square combinator 2. This causes the appearance of. the group of inverse outputs of the combinational quadrant 2 has the current value of a number, and on the group of its direct outputs there is a number y, where n is the counter size 1. Since the first group of inputs 6 of the adder 5 is fed a number, and the second group of inputs 7 is the number 2y ( As the i-th bit of the combination quad is connected to the (1 + 1) th bit of the second group of inputs 7 of adder 5 and the input of the matched partition of this group is set to zero, the current value of A appears at the output of adder 5 .

The accumulating adder 8 is used as a controlled frequency divider. The operation of the controlled frequency divider together with the multiplier of the number of pulses by two is described by the expression

d, A11..2.cl4

(ABOUT

44663 2

where А + 1 is the code that sets the coefficient of the controlled frequency divider;

dx is the increment of the input pulse-5 sequence of the controlled frequency divider;

dy is the increment of the output pulse sequence of the controlled frequency divider;

2n + 1 is the size of the group of information inputs of the accumulating adder 8,

 5 2 -1 -2

or dy -25

Dividing variables get

20

25

OT-G1-g) dx ..

(3)

2

Integrating (3) ,. find the current value of y in the counter 1

 2

oh oh

2 arctg th x, (5)

tgCarctg | d-) tg p; (6)

at 24g | -. .

BUT

Designating get

(7)

(eight)

35y k-tg -.

Thus, in counter 1, the current tangent value is generated.

40

Claims (1)

Invention Formula A device for calculating the tangent, containing a counter and accumulating summatrp, the transfer output of which is connected to the counter input of the counter, characterized in that, in order to improve the accuracy, a multiplier of the number of pulses is inserted into it two, a combinational adder and a quadrator, and the input the device is connected to the input of the multiplier of the number of pulses by two, the output of which is connected to the clock input of the accumulating adder, the information input and the transfer input to The best bit of which is connected respectively with the output of the combinational adder and the input of the logical unit of the device, the input of the logical the zero of which is connected to the input of the first bit of the first stroke of the combinational adder, the inputs from the second to (n + 1) -th (where n / 2 is the size of the functions) bits of the first input of the combinational adder are connected to the direct outputs with Editor L.Povkhan Compiled by A.Zorin Tehred M. Khodanich Proofreader A.Obruchar Order 3919/52 Circulation 671 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., A the first in the nth Raman Quad, the outputs of the inverse bits of which are connected to the inputs of the corresponding bits of the second input of the Raman adder, the output of the counter is connected to the first and second inputs of the Raman quad. rH  s Jt ъ .. About f