SU1448342A1 - Information input device - Google Patents

Abstract

The invention is intended to form a code representation of the signal under study with its input into a computer and can be used to analyze rapidly changing processes; The invention improves the temporal resolution when an analog signal is input into a digital computer by pre-entering information into a discrete-analog delay unit, the clock input of which is connected to the clock inputs of the analog-digital converter and frequency divider and the switch output, the information inputs of which are connected directly and through an additional divider. frequencies with the pulse generator output, and the control inputs of the switch are connected to the trigger outputs, the counting input of which is connected to the output m frequency divider, which provides an analog input signal at a high speed, followed by a relatively slow analogue-to-digital conversion and input to a digital computer, I yl. ., S (L

Description

WITH

| to

The invention is intended to form a code representation of the signal under study with input into a computer and can be used for analyzing rapidly changing processes.

The aim of the invention is to expand the scope by providing a longer resolution time when inputting signals.

The drawing shows a block diagram of an analog information input device in a computer,

The device contains an analog-digital converter 1, a delay unit 2, a switch 3, a pulse generator 4 and a frequency divider 5, the input of which is connected to the output of the pulse generator A, a trigger 6 and an additional frequency divider 7, the output of which is connected to the counting trigger input 6, the outputs of which are connected to the control inputs of the switch 3, the outputs of which are connected to the clock inputs of the analog-digital converter 1, the additional frequency divider 7 and the delay block

2, the output and input of which are connected respectively to the information input of the analog-to-digital converter 1 and the input 8 of the device, and the output of the pulse generator 4 and the frequency divider, stand 5 are connected to the first and second information inputs of the switch

3, element OR NOT 9.

The device works as follows.

The rapid process under investigation is fed to the input 8 of the device. In the initial state, trigger 6 is in the single state and the frequency dividers are in the zero state. Such a setup can be carried out, if necessary, by applying appropriate signals to the inputs of the installation of the splitter and the trigger. The division factor of divider 7 is equal to the number of bits of a discrete analog delay line, which can be implemented, for example, on elements with charge coupling (for example, microcircuits realizing such a delay line are commercially available — 593BR1 and 528BR1, etc.).

In process of receipt of clocks of impulses from the generator 4 - with frequency

The f input signal is recorded as time-sequential samples into a discrete analog delay line. After receiving N pulse

d

.. with

five

0

five

Where N is equal to the number of bits of the delay block 2 and the division factor of divider 7, the signal that triggers trigger 6 is formed on the code of the latter. Thereafter, a signal with frequency f / M is received through switch 3, where M is the frequency divider factor of 5. At This information from the output of the delay block 2 is read out M times slower than it was written, which ensures that the time resolution is increased M times relative to the maximum signal frequency that can be directly converted by the analog-digital converter 1 After entering the N points, the accumulation cycle and information input is repeated.

Triggering from external synchronization (for entering information about a selected part of the input signal) can be provided by removing the trigger setup signal and frequency dividers (the corresponding circuits are not shown, because, if necessary, they are performed in a standard way by connecting the setup inputs and resetting to the external clock or by performing a clock pulse generator controlled by the enable input. The signal about the output of information from the analog-digital converter can be obtained from the output of trigger 6, and the clock signal from the output of switch 3 can be used to indicate that the next sample is ready. If necessary, these signals can be applied to the OR-NOT 9 element, the output of which will be a single signal at the moments of reading information resolution.

Thus, it is provided that the user parts of a fast-paced process of interest are represented in a computer, represented by an analog signal using an analog-digital converter and an input channel B of a computer with a relatively low speed, with automatic selection of accumulation intervals and information input.

Claims (1)

Invention Formula A device for inputting information containing an analog-digital converter, a delay unit, a switch, a pulse generator, and a frequency divider, whose input is connected to the output of the pulse generator, is about m and h. y sch. This is because, in order to expand the application area by providing greater temporal resolution when entering signals, a trigger and an additional frequency divider are added to the device, the output of which is connected to the counting trigger input, the outputs of which are connected, to the switchboard control inputs, output which is connected to the clock inputs of the analog digital converter, additional frequency divider and delay unit, the output of which is connected to the information input of the analog-digital converter, and the input. It is an information device INPUT device, the outputs of the pulse generator and frequency divider are connected respectively to the first and second info | The inputs of the switch and the outputs of the analog-to-digital converter are the information outputs of the device.