SU1234774A1 - Device for determining parameters of signal extrema - Google Patents

Abstract

The invention relates to information and measurement technology. The purpose of the invention is to expand the functionality. The device consists of a delay line 1, a voltage divider 2, threshold elements 4.5, drivers 6.7, electronic switches 8.9. This goal is achieved by introducing 4 detectors 10,11, 12,13, voltage divider 3, control unit 14, which allows to determine the negative and positive extremes of signals, to increase the frequency range of the device. Block 14 sets the delay time and the trigger level of the threshold elements depending on the frequency and shape of the signal to be processed. 1 il. SL C

Description

The invention relates to information and measurement technology and can be used to determine points in time and extrema values.

The purpose of the invention is to enhance the functionality by determining the negative and positive extremes of the signals and increasing the frequency range.

The drawing shows a structural electrical circuit of the device.

The device contains a delay line 1, two voltage dividers 2 and 3, two threshold elements 4 and 5, two drivers 6 and 7, two electronic switches 8 and 9, four detectors 10-13, and a control unit 14, with the inputs of the detectors 10 and Both the delay lines 1 are connected to the input terminal, the output of the detector 10 is through a serially connected voltage divider 2, the threshold element 4 and the driver 6 is connected to one of the inputs of the key 8, the output of the I 1 detector is connected through a serially connected voltage divider 3, threshold element 5 and driver 7 to one the inputs of key 9, the other inputs of keys 8 and 9 are connected to the input terminal, the output of delay line 1 is detected by detectors 12 and 13 with the second inputs of voltage dividers 2 and 3, the first and second outputs of control unit 14 are connected to other inputs threshold elements 4 and 5, and the third output of block 14 is connected to the second input of the delay line 1.

The operation of the device is as follows.

The input signal U, (t) A sinuJt, where A is the amplitude of the signal; c1 1 is the signal phase, goes to the first input of delay line 1, to the second input of which from control unit 14 receives a signal that determines the delay time and at the output of the line 1 delay, a signal is delayed by time i,

U (t) A sin (OL -1).

At the same time, the signal is fed to the input of the first detector 10, which selects a positive half-wave Ui (t), and to the input of the second detector 11, which selects

full half of the input signal Uh (t).

The signal delayed by 1 is fed to the input of the third detector 12, the output of which forms the positive half-wave of the delayed signal Ug (t), and the input of the fourth detector 13, the output of which forms the negative half-wave of the delayed signal Ug (t). The positive half-wave of the original signal arrives at the first input of the first voltage divider 2, the second input of which receives the positive half-wave of the delayed signal, the output of the first voltage divider 2 produces a signal equal to the ratio of the positive half-waves of the original and delayed signal

u, (t)

, “Great

The output of the first voltage divider 2 is fed to the first input of the first threshold element 4, the second input receives a control signal from the first output of control unit 14, which determines the trigger level of the threshold element. When the threshold level of the first voltage divider 2 crosses the threshold level, a negative voltage drop is generated from which a pulse of duration t is opened at the output of shaper 6, which opens the first electronic key 8, and the positive extremum signal from the device input opens the first electronic key 8 during the time of presence

positive potential at its second in-course goes to the first output of the device.

The negative half-wave of the original signal is fed to the first input

the second voltage divider 3, the second input receives the negative half-wave of the delayed signal; the output of the second voltage divider 3 produces a signal proportional to the ratio of the negative half-wave of the original signal to the negative half-wave of the delayed signal

and rt).

 and (t)

s

The BE 1Code signal of the second voltage divider 3 is fed to the first input of the second threshold element 5,

The second input is a signal from the second control unit 14, which determines the trigger level of the threshold element.

When the threshold level is crossed by a signal from the output of the second voltage divider 3 from top to bottom, a voltage drop is formed at its output, according to which a pulse with a duration of: a second second switch 9 is generated at the output of the driver 7, while the negative extremum signal with the device's input through the open electronic key 9 during the time of the presence of a positive potential at its second input passes to the second output of the device

The control unit 14 sets the delay time and the level triggered by the threshold elements depending on the frequency and shape of the signal being processed.

Claims (1)

Invention Formula A device for determining the parameters of extremums of signals, containing a delay line, the first input of which is connected to the input terminal, the first voltage divider, the output of which through the first threshold element connected in series Compiled by G. Rasmotrova Editor L. Avramenko Tehred I. Popovich Corrector M. Demchik 2980/48 Circulation 728 Subscription VNISHI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., D.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4 and the driver is connected to one of the inputs of the first electronic key, the output of the second threshold element through the second driver is connected to one of the inputs of the second electronic key, the other inputs of both electronic keys are connected to the input terminal, in order to extend the functionality determining negative and positive extremums of signals and increasing the frequency range; four detectors, a second voltage divider and a control unit are inserted into it, and an input terminal the inputs of the first and second detectors are connected, the outputs of which are connected to the first inputs of the respective first and second voltage dividers, the output of the delay line is connected to the second inputs of the second threshold element through the corresponding third and fourth detectors, the second inputs of the voltage dividers, the second the inputs of the threshold elements are connected respectively to the first and second levels of the control unit, the third output of the control unit is connected to the second input of the delay line, which on adjustable.