SU1057955A1 - Digital function generator - Google Patents

Description

The invention fires an automagical computing and measurement technique and can be used in approximating, linearizing and computing devices, in particular for linearizing the characteristics of frequency sensors. A device is known for calculating an actual supersonic function from values that are preliminary imputations, containing a counter, a group of elements, and ti. The disadvantage of the device is its low functionality. The closest in technical essence and the proposed converter is a device comprising the first and second, a counter, a group of pulsed And elements, a pulsed adder and a multiplication unit. The disadvantage of the device is the impossibility of reproducing the functions -rl (x) cJX.,. I (MX - 11el of the invention - extension of the class of tasks to be solved by the possibility of simultaneously calculating dependencies

 f (, /., Γ

f (

 --- j m + f (x)

The goal is achieved by the fact that a digital functional converter containing the first and second counters, a group of pulsed potential elements AND and the OR element, the outputs and the second counters are connected respectively to the first and second inputs of the corresponding pulse-friendly elements And groups, whose outputs connected to the inputs of the OR element, the pulse-frequency modulation unit, the pulse calculator, and a third counter, the input of which is connected to the output of the OR element and the first input, and pulsed subtractor, a second input and whose output is connected respectively with an input device taktovp L and the input of the second counter, coupled to vhodpervogo rchetchnka Yield unit pulse number modulation input koto-horn connected to the clock input of the device.

VdV

(2)

(52 m

Taking into account (1), we get

X

dv

oie

c3z

m

°° "" ° dv-dx-dz

From (3) and (4)

(five-;

or

(fe)

The pulse sequence z is integrated by the counter 5, and the current number Z in the counter is determined by the expression

Jl

(7 /

m

m “e FIG. 1 shows a block diagram of a converter: FIG. 2, - block diagram and temporal diagrams of the operation of the pulse subtractor. The converter contains (Fig. 1) a clock input 1, a block 2 of a frequency-pulse MODE 71ATI, counters 3-5 an input 6 of the counter 3, a group 7 of pulsed-potential elements AND, an output 8 of the counter 3, an element OR 9, a pulse subtractor 10, an input 11 and output 12 and 13 of the pulse subtractor containing (Fig. 2) trigger 14 and the element OR 15. Consider the operation of the device for the number of pulse modulation in the mode of generating ex UiT and the Vroie dependence. Hence the current value of the number y in the counter 3 is determined by the expression Vrcie (1) Counter 4 (divider), g The ruler of the impulse elements And 7 and the element OR 9 is a binary frequency multiplier (DUCH), controlled by the counter 3. The increment dv of the impulse sequence V supplied to the input of the trigger 4, pulls out at the output of the DUCH increment of 32 pulse serial. smCn m + oie | (9} Hence, the heckish value of the number in the counter 5

x

tn

 „1" "e 2 men-s T5

We determine the current value of the number of the counter 4. Taking into account (4)

VXX

| ,, v jax. |

3Z (10)

Thus, the proposed converter allows the CALCULATE functions to be calculated.

ten

 te ti-i

(x)

l

15

and. in particular, logarithmic dependencies. 10570554 Received in BO attention (10), (8) and (9), we get t 5M Y-mCn - H-ii I t

. 2

Claims (1)

(54) (57) A DIGITAL FUNCTIONAL CONVERTER containing the first and second counters, a group of pulse-potential elements AND the th element OR, and the outputs of the first and second counters are connected respectively to the first and second inputs of the corresponding pulse-potential elements AND groups, the outputs of which are connected to inputs of the OR element, distinguished by the fact that, in order to expand the class of problems to be solved by the possibility of calculating simultaneously the dependences t '$ 0, a frequency-pulse modulation unit, a pulse calculator, and a third counter, the input of which is connected to the output of the OR element and the first input of the pulse calculator, the second input § and the output of which are connected respectively to the clock input of the device and the input V / house, are introduced into it the second counter, the input of the first counter is connected to the output of the number-pulse modulation unit, the input of which is connected to the clock input of the device.