SU625201A1 - Arrangement for transmitting analogue signals in discrete form - Google Patents

Description

(54) DEVICE FOR TRANSFERING ANALOG SICHALS IN DISCRETE FORM

The invention relates to automation and computer tagging and is intended for use in systems for receiving and transmitting measurement information.

Known device for transmission

analog signals in discrete form does not have high accuracy and instrumental simplicity ij.

The most technical solution to the invention is a device for transmitting analog signals in discrete form, containing an anapolis digitizer, the inputs of which are connected to the discharge outputs of a reversible counter, the OR element, which also does not have sufficient simplicity and accuracy of operation due to the use of a redundancy reduction unit for storing code and time blocks, which requires the use of additional control blocks 2j.

The purpose of the invention is to improve the accuracy and improve the device.

This is achieved by the fact that the device contains connected to the control

the inputs of the reversible counter are a tertiary zero-body, whose input is connected to the output of the analog-digital converter, an Enaka trigger connected by its inputs to the control inputs of the reversible counter, the switch whose fixed contacts are connected to the outputs of the bitwise transfer signals of the reversible counter, and the movable contact with one input of the element OR, and elements AND, gating the input of which is connected to the output of the element OR, connected by its second input with the output of the sign trigger.

The drawing shows a block diagram of the proposed device.

The device consists of a null-organ 1, an aloha-digital converter (ADC) 2 of the reversing counter 3, (lamellar) switch 4, the trigger of the sign 5j of the element OR 6, the elements of And 7 and 8 and the acf, of the fermentation chain 9.

Claims (1)

The device works as follows. Nupi-organ 1 opens the input of the combination of the reversible counter 3 when the input input exceeds the feedback signal or. the input subtraction is in the opposite situation and closes both inputs when the indicated signals are equal with an accuracy determined by the sensitivity of the comparison circuit. Thus, at any moment in time, on the reversing counter 3, there is a digital equivalent of the converted signal, which can be read. Special Consideration: A sample sampling signal deserves. In the device being described, the transfer circuit output from bit to bit is entered on switch 4. This switch produces a select signal. The transfer signal to the k-th digit indicates an increase (or decrease) of the input signal by D and 2 D and, where D and is the price of the lower digit of the counter. The entire range of possible changes in the input signal UmAq is broken down into a number of levels. and the readout is performed at the moment when the signal crosses these levels. The three-pointer null-organ 1 allows you to record the moment when the input signal passes the extremum and its character. At this point, the addition and subtraction channels are switched. This function is performed by the trigger of sign 5, which is enabled as follows: signals are received from the bus at one trigger input, and the subtraction from the bus is received at the input of the trigger. When switching channels, it changes state. The inputs of the trigger of the sign and the switch gsh are combined by the element OR b, at the output of which the signals of the sample are formed, arriving at the station, robbing the two output elements AND 7 and 8, Espi to have information about the sign of the first derivative of the signal at the time of sampling and the extreme the values of the signal ordinate can be restored by the following formula: U AU -Of-AUH-bt where and is the amplitude of the second sample and the number of samples with the primary derivative, in the interval from the first to the fifth sample; t) - the same, with a negative derivative, and in this way, in this scheme, which adapts to the first derivative, only the sign of the first derivative at the time of reference is recorded and extreme values are marked. In the opied device, where in. As a sampling signal, the transfer signal is taken to the ith counter of the counter; it is definitely possible to judge the sign of the derivative by the value of the best bit of the counter. The transfer to the k-th digit of the counter occurs in ciuation, when when added all the bits to the k-th are set to zero, when subtracted - to one (there is a transition through all the younger k-1 bits, and in this way, O the youngest bit Yes, it shows positive sign of the derivative, and 1 indicates negative. Formula of the invention A device for transmitting analog signals in discrete form, containing an analog-to-digital converter, the inputs of which are connected to the discharge outputs of a reversible counter, and the OR element, characterized in that to increase accuracy and simplification of the device, it contains an organ connected to the control inputs of the reversible counter, a three-position zero organ whose input is connected to the output of an analog-digital converter, a sign trigger connected by its inputs to the control inputs of a reversible counter, a switch whose fixed contacts are connected to the outputs signals of one-way transfer of a reversible counter, and a movable one with one input of the OR element, and AND elements, whose gate inputs are connected to the output of the OR element connected about their second entrance with the exit trigger sign. Sources of information taken into account in the examination: 1, Application No. 1820812, class, Q f F 3/00, 1973, by which a positive decision, 2, USSR Author's Certificate MU 195209, CL. Q 06 F 3/00