SU1322365A1 - Control device for linear segment indicator - Google Patents

Abstract

The invention relates to the field of electronics, namely, devices for controlling indicators of a scale type, and can be used in measuring devices and other electronic equipment. The invention solves the problem of increasing accuracy and expanding functionality. Improving the accuracy of the conversion is achieved by using the analog-digital converter 4, register 5 and comparison circuit 7, which makes it possible to separate the functions of the analog-digital-Eioro conversion and selection of the switching levels of the indicator elements. The performance of the last function by the digital device guarantees high accuracy Expansion of functionality is the ability to set various transformation laws by simply reprogramming block 6 of the permanent memory. 1 il. 11 00 th to have eaten

Description

The invention relates to electronic equipment, namely, control devices for scale-type indicators, in which analog information is displayed as a column of included indicator elements, and can be used in measuring instruments, tape recorders, radio receivers and other electronic equipment.

The purpose of the invention is to improve the accuracy and enhance the functionality of the device due to the possibility of setting various laws of information transformation.

The drawing shows a block diagram of the device.

The device contains a pulse generator 1, a counter 2, a decoder 3, an analog-digital converter 4, a register 5, a block of 6 permanent memory, a comparison circuit 7, a block of 8 drivers, a group of 9 elements I.

The device has input 10, outputs unitary 11 and binary 12 codes.

The device works as follows.

Pulse generator 1 produces pulses that control the operation of all dynamic elements of the device, including analog-digital converter 4, counter 2, register 5. Counter 2, the counting input of which is connected to the output of pulse generator 1, successively receives all its states and produces corresponding exit codes. To the output of counter 2, the input of the decoder 3 and the address input of the unit 6 are connected. The decoder 3 decrypts the output signals of the counter, generating the polling signals sequentially at each of its outputs. At the same time, the output signals of the counter 2 are addressed to block 6, the contents of which are word for word fed to the second input of the comparison circuit 7. Each word is a code defining the switching threshold of the next indicator element.

The first output of the decoder 3 is connected to the start input of the analog-to-digital converter 4 and to the synchronous input register 5. When a signal appears on this output of the decoder, the next cycle of the analog-digital conversion begins. At the same time, the result of the previous conversion is stored in register 5, where it is stored during the entire conversion cycle.

To synchronize the start of the analog-digital conversion and enter the data into the register, the signal from any of the outputs of the depotfinder can be used, since only its period is important, not the phase.

The data from register 5 is fed to the first input of the comparison circuit 7 and to the inputs of the drivers of block 8. During operation, these data are compared by succession with the circuit 7 of comparison with the codes from block 6.

five

The comparison circuit 7 can be performed by any of the known methods, for example, on the basis of a subtractor with the determination of the sign of the difference. At the output of the comparison circuit 7, a logical unit is generated in the event that the number represented by the code at the output of register 5 is greater than the number specified by the code word from block 6. The flow to the first inputs of elements AND group 9, the output signal of the comparison circuit 7

0 allows the output of the decoder 3 to pass to the output of the unitary device code, which controls the activation of the indicator elements. Thus, when codes are mixed in a permanent storage device, in order of increase, those elements of the indicator that correspond to codes of numbers not exceeding the code values in register 5, i.e. the result of the last conversion.

Q Data from register 5 is also fed to the inputs of the drivers of block 8 and from its output can be fed to external devices via the output of the binary code of the device.

The number of elements And 9 selectable

5 equal to the required number of display elements. The number of drivers in block 8 should be equal to the analog-to-digital converter 4 and register 5. However, in order to reduce the number of external connections, parallel-serial can be used instead of parallel register 5 and, with appropriate addressing of block 6, a one-bit sequential comparison circuit 7 . In this case, only one driver is needed, with which the output

 information from register 5 to external devices is performed in a sequential code. The essence of the invention does not change.

Improving the accuracy of the device conversion is achieved by using an analog-digital converter, a register, and a digital code comparison scheme, which makes it possible to separate the functions of the analog-digital conversion and highlight the switching levels of the indicator elements. Allocation of these levels by the digital code comparison scheme ensures a high degree of repeatability of the device characteristics, the absence of temporal and climatic instabilities.

0 Enhanced functionality is the ability to change the law of transformation by setting different codes in a persistent storage device, the possibility of using a wider range of indicator elements, such as filament, due to the presence of AND elements, the possibility of using the exact digital value of the signal under study, removed from the outputs

0

five

drivers connected to the outputs of the register for the purpose of registration and automatic control.

Claims (1)

Invention Formula A device for controlling a linear segment indicator containing a pulse generator, a counter and a decoder, the output of the pulse generator is connected to the counter input of the counter, the output to the counter 10, the first output of the decoder is connected to the input of the decoder, connected to the start of the analog-digital the converter and to the synchronous register, the i-th output of the decoder (i 2, N, where N - the device, the clock input of the analog-digital converter is connected to the output of the pulse generator, the output of the analog-digital converter is connected to the information input of the register, the output of which is the output of the device binary code and connected to the first input of the comparison circuit, the second input of which is connected to the output of the constant block a memory whose address input is connected to the one that is distinguished by the fact that, in order to increase the accuracy of conversion and enhance functionality due to the possibility of setting various information conversion laws, an analog-to-digital converter, a register, a block of permanent memory, a comparison circuit and a group of elements AND are entered into it, the information input of the analog-digital converter being an information input 15 the number of outputs of the decoder) is connected to the first input of the j-ro element AND group (j 1, N-1), the second inputs of elements AND group are connected to the output of the sign "The first operand is greater than the comparison circuit, the outputs of elements AND group are the corresponding output bits of the unitary device code., the counter, the first output of the decoder is connected to the start input analog-digital the device, the clock input of the analog-digital converter is connected to the output of the pulse generator, the output of the analog-digital converter is connected to the information input of the register, the output of which is the output of the device binary code and connected to the first input of the comparison circuit, the second input of which is connected to the output of the constant block memory whose address input is connected to you the number of outputs of the decoder) is connected to the first input of the j-ro element AND group (j 1, N-1), the second inputs of elements AND group are connected to the output of the sign "The first operand is greater than the comparison circuit, the outputs of elements AND group are the corresponding output bits of the unitary device code.,