SU744637A1 - Function generator - Google Patents

Description

(54) FUNCTIONAL CONVERTER

The invention relates to electrical computing devices and can be used in computing machines. A functional converter is known that contains a comparison unit, a reference voltage generator, a control unit 1.. This device has a low speed. Of the known devices of similar purpose, the functional converter is the closest to the one proposed, which contains the first exponential voltage generator, the output of which through the first null organ is connected to one input of the differential voltage time generator, the second exponential voltage generator, the output of which through the second the zero-organ is connected to another input of the delta time interval generator / output of the clock pulse gayer connected to the control input of each of the toro generator In the exponential voltage, the output buffer stage, the output of which is connected to the second input of the second null organ, an additional input i of each of the generators of the expo nal voltage is connected to the corresponding input of the converter, the third input of which is connected to the second input of the first zero organ 2. This The device also has a relatively low speed. The purpose of the invention is to increase speed. The proposed functional pre-. the diverter differs from limestone in that the charging and discharge switches, a storage capacitor and two setpoint resistors are entered into it, the input buffer output stage is connected via a serially connected first time setpoint resistor and charging switch to the output of the supply voltage source, and through the storage capacitor and through the second time connected in series, the master resistor and the discharge switch to the zero potential bus, the control input of the charging switch is connected to the first output; Ate a differential time interval, the second output of which is connected to the control input of the bit switch. The block diagram of the proposed functional converter is shown in FIG. one.

It contains the first 1 and second 2 exponential voltage generators, the first 3 and second 4 zero-organs shaper 5 differential time interval, generator 6 clock pulses, the first 7, second 8 and third 9 inputs of the converter, charge key 10, bit 11, the first 12 and the second 13 times the drive resistors, the storage capacitor 14, the output buffer stage 15, the zero potential bus 16, the output 17 of the power supply source.

FIG. 2 shows the plots of signals acting on the outputs of the functional blocks.

Plots and (t) and U (t) represent the output voltages of the first and second generators of exponential voltages, the maximum value of which is equal to the input signals Y and Z acting on the first and second inputs of the converter, respectively. Plot X represents the signal acting on the third input of the transducer, plot F is the signal at the output of the converter, plots U (t) (t) are the output signals of the first and second null organs, plot 05 (t) and Ug (t) signals, acting on the control inputs of the charge and bit keys

The device works as follows.

The inputs 7, 8, 9 of the converter receive voltages proportional to the input signals Y, Z, X, respectively. Generators 1,2 exponential voltages produce a sequence of voltage pulses, respectively (Fig. 2):

and (t) Y- ,, (1) and, (t) Ze-Vr, (2) where r, r are the time constants of exponential stresses. Generator. 6 clock pulses ensures synchronous operation of the first and second generators of exponential voltages. Their output signals U (t), U (t) are fed to one of the inputs of the zero-bodies 3, 4. Voltages proportional to the variables X and F are received to their second inputs. As a result, they are compared with the signals and (t) U2 (t) at the outputs of the first and second null organ, sequences of rectangular pulses are formed, the durations of which T, T are determined by the moments of equality of the instantaneous values of U (t), U / j (t) and the voltages proportional to the X and F diagrams ), U (t) (Fig. 2)

T, I, (3) T tr, .tn f, (4)

The signals UZS (t), U (t) are fed to the inputs of the imaging unit 5 of the difference interval of time. On his way out, rectangular impulses are formed.

the duration of which is pa (Vna the difference in durations T, T. In this case, if Tj is greater than T, then pulses appear at the control input of the charging switch 10. This switch closes, at and at time t the charge of the storage capacitor 14 (plot F). At a time point, the tj –sea key 10 is separated and the charge of the storage capacitor 14 is stopped. The large input resistance of the output buffer stage 15 prevents the storage capacitor 14 from discharging during a period of time.

Then, a pulse appears again at the control input of the charging key 10 and the storage capacitor 14 is charged again up to time point t. The considered process continues until technical measures until the pulse durations T, Tj at the outputs of the zero-organs 3, 4 become equal. In equilibrium state Y „„ F

yr

(five)

((b)

or F Z

wu t2

Thus, at the output of the device, a signal is formed that simulates the functional dependence (-6),

where the relation si n can be integer

or a fractional number.

Since the charge of storage capacitor 14 begins at times

5, corresponding to the falling edges of the pulses at the zero-organ output, 3, the charge constant of the storage capacitor 14 can be chosen sufficiently small. In such a mouth,. In reality, the computation time of the function does not exceed 2-3 periods of exponential stress.

The bit to key 11 provides the next mode of operation of the device. Suppose, at time t, the signal proportional to X has changed abruptly. In this case, the duration T is hundred. less than T and a pulse of duration () appears at the control input of the bit switch 11, the charge key 10 remains open. During the period of time tg-tj, the storage capacitor 14 is discharged. The value of resistance V time of the setting resistor 13

5 is chosen so that the constant discharge of the storage capacitor 14 is equal to the time constant of the generator 2 exponential voltages. Therefore, already at the moment of time t, i.e. equality (6) is satisfied, which indicates a high speed of the device ..

Formula and Inversion Functional converter, 5 containing the first exponential voltage generator, the output of which through the first null-organ is connected to one input of the differential time interval former, the second generator of exponential allocations, the output of which through the second zero body is connected to the other input of the difference-ratio generator, time, the output of the clock pulse generator is connected to the control input of each of the exponential voltage generators, the output buffer stage, the output of which The second is connected to the second input of the second nullorgan, the auxiliary input of each of the exponential voltage generators is connected to the corresponding input of the converter, the third one (of which is connected to the second input of the first null organ, characterized in that, in order to increase its speed, charge and discharge switches, a storage capacitor, and two setpoint resistors are introduced, the output buffer stage is input through a series connected first setpoint resistor, and a charging key. the supply voltage source, as well as through the cumulative kodensator and through serially connected second time, the master resistor and the discharge key to the zero potential bus, the control input of the charging key are connected to the first output of the differential voltage time generator, the second output of which is connected to the control the input of the bit of the bit. Sources of information taken into account in the examination 1, USSR Author's Certificate No. 423138, cl. G 06 G 7/26, 1972. 2. Lichtzinder M. Ya. Exponential modulating devices in information-measuring systems. Energy, 1971, with. 56-59, fig. 43 (prototype).

Ut (t)

(isit)

iput.i

Claims (1)

Claim A functional converter containing a first generator of exponential voltage, the output of which through the first zero-organ is connected to one input of the differential time interval shaper, a second exponential voltage generator, the output of which through the second zero-organ is connected to another input of the differential time interval shaper, the output of the clock generator is connected to the control input of each of the exponential voltage generators, the output buffer stage, the output of which is connected to the second the input of the second zero organ, the additional input of each of the exponential voltage generators is connected to the corresponding input of the converter, the third input of which is connected to the second input of the first zero organ, characterized in that, in order to increase performance, a charging and discharge keys, a storage capacitor are introduced into it and two times I ask; resistors, the input of the output buffer stage is connected through a series-connected first time-setting resistor and a charging key. It is connected to the output of the supply voltage source, as well as through a storage capacitor and through a series-connected second time-setting resistor and a discharge key to the zero potential bus, the control input of the charging key is connected to the first you ⁴ steps of the shaper of the difference time interval, the second output of which is connected to the control input. bit key.