SU1211856A1 - Digital function generator - Google Patents

Abstract

The invention relates to a pulse technique and is intended to reproduce a wide class of functional dependencies. The purpose of the invention is to expand the functionality. This is achieved by repeatedly reproducing a given function of one variable uniquely defined on a reproduction segment, with the subsequent integration of the output signal. The device contains a generator of 1 pulses, counters 2, 3

Description

and 6, blocks 4 and 5 comparisons and code converters 7 and 8. As counters, it is envisaged to use counters with parallel setting of the initial state or

The invention relates to a pulse technique and is intended to reproduce a wide class of functional dependencies.

The purpose of the invention is to expand the functionality of the device by repeatedly reproducing a given function in one variable 5 uniquely determined on a reproduction segment, with the subsequent integration of the output signal being allowed.

The drawing shows a block diagram of a digital function generator.

The digital functional generator- torus contains a generator 1: pulses, the output of which is connected to the counting inputs of counters 2 and 3. The parallel outputs of counters 2 and 3 are connected to the first inputs of comparator blocks 4 5 respectively 5 of the code of comparator block 4 connected to the reset input of the counter 2 and with the counting input of the counter 6, the output of the comparison unit 5 is connected to the reset input of the counter 3 and to the output of the device, the parallel output of the counter 6 is connected to the inputs of the code 7 and 8 converters, the outputs of which are connected to the second inputs of the blocks (4 and 5 respectively.

In this device, as counters 2, 3 and 6, counters can be used with parallel installation of the initial state of the kgsi universal registers.

The device works as follows.

The pulses of the reference frequency from the output of the generator 1 {1 pulses arrive at the counting inputs of counters 2 and 3. The counters accumulate the input pulses until the units 4 and 5 of the comparison arrive, resetting the counters in

universal re1 istra. To achieve this goal, two code converters and a third counter are additionally introduced into the device. 1 il.

five

0

five

0

five

0

zero state. Counter 2 and comparison block 4 increment the argument & X /. Counter 3 and comparator block 5 produce output pulses with a variable follow-up period. A signal about the end of the formation of the increment AH; from the output of the comparator unit 4 is fed to the counting input of the counter 6, which blinks the increment number and, therefore, changes the code at the output of the code 7 and 8 converters, which leads to a change in the argument increment and the period of the output pulses.

The output function is represented by the pulse frequency, varying according to a given law. Stepwise approximation of mathematical dependence is used.

In this generator, the counter 3 and the comparison block 5 is essentially a divider with a variable division factor, which forms only the value of the output function, and operates independently of the counter 2 and the comparison block 4. Counter 6 performs the function of the random access memory of the number of the generated increment iX; Transmitters of codes 7 and 8 allow forming, in general, arbitrary codes for comparison blocks 4 and 5, and the coefficient change program is determined by the operation of transducers of codes 7 and 8 and can be fixed or adjustable. The presence of two transducers of codes 7 and 8 makes the change in the conversion factors of the increment operators of the argument and the output function independent.

Formulas

the invention

A digital function generator containing two counters, two comparison units and a pulse generator.

the output of which is connected to the counting input of the first counter whose outputs are connected to the first inputs of the first comparison unit, the output of which is connected to the reset input of the first counter, the outputs of the second counter connected to the first inputs of the second comparison unit, the output of which is connected to the reset input of the second counter, different by the fact that, in order to expand the functionality,

Editor L.Avramenko

CoG: tavitel A.Klimov Tehred O.Vashchishina

649/59

Circulation 818 Subscription

VNIIPI USSR State Committee

for inventions and discoveries I13035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

211856

Two code converters and a third counter, whose input is connected to the output of the first comparison unit, and outputs to the inputs of code converters, the output of the first Code converter, are connected to the second inputs of the first comparison block, and the outputs of the second code converter are entered. connected to the second inputs of the second 10 comparison unit, with the output of the pulse generator connected to the counting input of the second counter.

Proofreader G. Reshetnik

Claims (1)

Claim A digital functional generator containing two counters, two comparison units and a pulse generator, the output of which is connected to the counting input of the first counter, the outputs of which are connected to the first inputs of the first comparison unit, the output of which is connected to the reset input of the first counter, the outputs of the second counter are connected to the first the inputs of the second comparison unit, the output of which is connected to the reset input of the second counter, characterized in that, in order to expand the functionality, two code converters are introduced into it '211856 and a third counter, the input of which is connected to the output of the first comparison unit, and the outputs are connected to the inputs of the code converters, the output of the first code converter is connected to the second inputs of the first comparison unit, and the outputs of the second code converter. connected to the second inputs of the second 10 comparison unit, and the output of the pulse generator is connected to the counting input of the second counter. . Editor L. Avramenko