SU1223257A1 - Exponential function generator - Google Patents

Abstract

The invention relates to automation and computer technology and allows to increase the instrumental accuracy and noise immunity of the generator due to a decrease in times (K - coefficient of the amplifier 6) constant component of the error introduced by the analog storage device (AMS) 5, increasing the accuracy of the initial condition and stability to noise on the control circuit of the AMU 4. The device is based on the alternate operation of the AMS 4 and 5, between which the amplifier 6 is turned on. The output of the АУУ 5 through the switch 2 is connected to the input of АЗУ 4. Switching signals are generated by the synchronization unit 3, which is performed on the master oscillator 7 pulses and the distributor 8 pulses. One of the inputs of the switch 2 is connected to the output of the source 1 of the reference voltage. 2 Il. C 9 (L F1 / g. /

Description

The invention relates to automation and computing and can be used, in particular, in automatic control devices as a generator of driving functions.

The purpose of the invention is to increase the instrumental accuracy and noise immunity of the generator.

FIG. 1 shows a block diagram of the exponent of the exponent function; in fig. 2 - timing diagram of the generator.

The exponential function generator will hold (Fig. 1) the source 1 of the reference voltage, the switch 2, the synchronization unit 3, the first 4 and second 5 analog storage devices of the amplifier 6. The synchronization unit 3 is completed on the master oscillator 7 pulses and the distributor 8 pulses

The time diagram (Fig. 2) shows an indicative function: / and signals and, Uj at the outputs of the first and second analog storage devices, respectively (depending on the argument t).

The generator of the exponential function works as follows.

In the initial state, the output of the switch 2 has a voltage from the source 1 of the reference voltage, the information input of the first analog storage device 4 is connected to the output of the source 1, and the output of the device 4, and therefore, the output voltage of the indicative function generator has an initial voltage of source 1 reference voltage. The information input of the second analog storage device 5 is also switched on and at the output of the storage device 5 there is an initial voltage from the source 1 of the reference voltage multiplied by the gain factor K of the amplifier 6

With the first cycle of operation of the master oscillator 7 of the pulses of the synchronization unit 3, the information input of the memory 4 through the second output of the distributor 8 pulses is disconnected at the output of the memory 4, and hence the memorized initial voltage remains at the generator output of the exponential function. In this case, through the first output of the distributor 8 pulses of the block 3, the switch 2 switches to such a position that its output pos

0

0

five

3257

2

the voltage from the output of the memory 5 is blunt, and this position is maintained until the end of the operation of the exponential function generator. The information input of the memory 5 continues to remain on, and the output of the memory 5 has an initial voltage multiplied by a factor of K.

In the second cycle of operation of the master oscillator 7, the information input of the memory 4 through the second output of the distributor 8 pulses is turned on, and the output of the memory reminder 4, and therefore, the generator output of the exponential function receives the initial voltage multiplied by the factor K. In this case, the information input of the memory 5 through the third output of the pulse distributor 8 is turned off, and the output of the storage device 5 contains the voltage stored in the first cycle of operation.

In the third cycle of operation of the master oscillator 7, the information input of the storage device 4 is turned off, and at its output, i.e. at the output of the exponential function generator, there is a voltage memorized in the second cycle of operation (initial voltage multiplied by a factor V). In this case, the information input of the storage device 5 is turned on, and its output through the amplifier 6 receives the voltage from the output of the storage device 4. The output voltage of the storage device 5 is 0

five

initial voltage multiplied by the coefficient K.

In the fourth cycle of operation, again, as in the second cycle, the information input of the storage device 4 is turned on, and its output, i.e. the generator output of the exponential function receives a signal equal to the initial voltage multiplied by K. At the same time, the information input of the memory device 5 is switched off again and there is a voltage stored in the third cycle of operation on the output.

In the fifth clock cycle, again, as in the third clock cycle, the information input of device 4 is turned off and the information input of device 5 is turned on. With each clock cycle, the signal is cyclically transmitted from the output of the first analog storage device 4 to the input of the second analog memory

device 5 and further from the output of the device 5 to the input of the device 4, every two cycles, multiplying by the gain of the amplifier 6. When the operation ends, the generator of the exponential function returns to the initial state.

The operation of the generator can be described with an error of stepwise approximation by the following expression:

Vt at a "k

where a is the initial value of the reproduced function, representing the initial voltage from the source 1 of the reference voltage; K is the basis of the function, which is the gain of amplifier 6;

i

g

indicator at t (f is the master frequency of the master oscillator 7 pulses of the synchronization unit 3)

As can be seen from the formula, the output value can be controlled by three parameters. These parameters can be varied smoothly and independently of one another by varying the voltage of the source 1 of the reference voltage, the gain factor of the amplifier 6, and the driving frequency of the pulse generator 7. At the same time, an increase in instrumental accuracy is ensured by a decrease in K times (to 1) of the constant component of the error introduced by the second analog storage device, as well as by more accurate

setting in the first analog storage device the initial value 4 of the reproduced function. The increase in noise immunity to control circuit noise is due to the sequential setting of the keys and the recording of the initial value in the information input mode of the first memory device and the sample.

Claims (1)

Invention Formula The exponential function generator, the content amplifier, is a voltage source, the output of which is connected to the first information input of a switch connected by a control input to the first output of the synchronization unit, and the output to the information input of the first analog storage device connected by the input control of the sample and storage with the second output of the synchronization unit, the third output of which is connected to the input control of the sample and storage of the second analog storage device, different that, in order to increase its instrumental accuracy and noise immunity, the second information input of the switch is connected to the output of the second analog storage device connected by the information input to the output of the amplifier, whose input is connected to the output of the first analog storage device and the output of the generator of the exponential function. IOt i {