SU1287021A1 - Meter of amplitude ratio of two pulses placed in sequential order on time axis - Google Patents

Abstract

The invention relates to computing and measuring technology and can be used to measure the average value of the ratio of the amplitudes of two synchronous pulse sequences. The aim of the invention is to increase the accuracy and increase the dynamic range. To achieve this goal, the amplitude-time converter 2, the closing controlled contact 4 and the charging resistor 5 are additionally introduced into the amplitude ratio meter. The meter also contains a storage device 1, a single vibrator 3, a storage capacitor 6, a DC amplifier 7, a controlled discharge A single device 8 containing an additional capacitor 9 and a switching contact 10. On the drawing; e also shows terminals 11-15. The meter is characterized by the inertia independence in the field of stable operation from the amplitude of the input signals, which ensures an increase in measurement accuracy and reliability of operation. 2 Il. Q cl

Description

Yu

00

about to

Fi.G

The invention relates to computing and measurement technology and is intended to measure the average value of the ratio of the amplitudes of two synchronous pulse sequences.

The aim of the invention is to increase accuracy and wider dynamic range.

Figure 1 shows the functional diagram of the meter; FIG. 2 shows timing charts explaining his work.

The meter consists of a storage device 1 -, an amplitude-time converter 2, a single-oscillator 3, a closing controlled electronic contact 4, a charging resistor 5, a storage capacitor 6, a constant-current amplifier 7, controlled by a discharge device 8, containing additional capacitor 9 and switching contact 10, Terminal 11 - the input of the discharge device, and terminals 12 and 13 - its output and control input, respectively. The input terminals 14 and 15 are connected respectively to the inputs of the storage device 1 and the amplitude-time converter 2. The output of the amplitude-time converter 2 is connected to the control inputs of the one-oscillator 3, the closing contact 4 and the discharge device 8. The output of the one-vibrator 3 is connected to the reset input of the memory device 1, and the output of the storage device 1 is connected to the input of the closing contact 4, the output of which is connected to the input of the direct current amplifier 7 via a negative feedback circuit. otorrhea enabled storage capacitor 6, entrance discharge device connected to an output amplifier 7 which is output meter (terminal 16), and an output discharge device coupled to an input of the amplifier.

Voltage pulses of amplitude are applied to terminal 14. When exposed to pulses A ,; at the output of memory 1, a voltage A is established; (FIG. 2 c). Upon the arrival of a pulse of amplitude A5; at the output of the amplitude-time converter 2 a pulse is generated

inversely proportional to amplitude (FIG. 2 d) i.

If

, ---, where K. const is the coefficient Aj;

The conversion is 1); .

Under the action of the pulse Tj from the output of the converter 2, the switch 4 is open and the storage capacitor 6 is charged to the storage capacitor 6 via the charging resistor 5.

---- S

 K, A, R Aj;

Simultaneously with the operation of the charging circuit under the action of a pulse of SG. running and discharge circuit. Under the action of a pulse, the switching contact 10 disconnects the additional capacitor 9 from the output of the meter and connects to the input of the DC amplifier 7. As a result, the charge capacitor is removed from the storage capacitor.

q C, V (i-l),

Where V (i-1) is the voltage value at the output of the meter at the time of arrival (-th pair of pulses A ,;, A,; C, is the capacitance value of the additional capacitor 9.

With the falling edge of the pulse, a one-shot 3 is triggered, the output of which produces a pulse of constant duration (Fig. 2e). Under the action of this pulse, memory 1 is zeroed. At this point, the meter cycle ends. The change in voltage at the output of the meter under the action of the i -th pair

BUT,; , BUT,

difference equation

impulses A; , BUT,; determined from

five

0

V, (q; -

-KiAn R A ,,)

 h - -

 - C; V (i-l), where C is the value of the capacity of the storage capacitor. Solving the difference equation (l) for averages. A ,, A. and V (i) is found by the method of mathematical induction and under the initial condition V (0) V. and

(one)

/ 1- -bi /

: one

(2)

after the transition process has the form

V (with)

. t

(3)

those. the output parameter of the proposed meter linearly depends on

BUT

Claims (1)

ratios A, / A2, where A ,, A are the average values of the amplitudes of the input pulses, i.e. The proposed meter is characterized by the inertia and stable operation area being independent of the amplitude of the input signals, which ultimately leads to an increase in the reliability of operation and an increase in the accuracy of measurement of the ratio of the amplitudes of the two pulse sequences. Formula invented and An amplitude ratio meter for two pulses alternately arranged on the time axis, containing a DC amplifier whose negative feedback circuit includes a storage capacitor, a switching contact, the first output of which is connected to the amplifier input, and the common output is connected to one of the additional terminals a capacitor, the second output of which is co (t) but BUT" common-sized dinene, a storage device, a one-shot, the output of which is connected to the input of the initial value setting — a storage device, characterized in that, in order to increase the accuracy and expand the dynamic range, the amplitude-time converter, the closing contact and the charge are introduced into it one resistor, one of the outputs of the closing contact is connected to the output of the storage device, the input of which is connected to the input of the meter, the second input of the closing contact is connected via a charging resistor to the amplifier input, the input of the amplitude-time converter is connected to the second input of the meter, its output is connected to the input of the one-oscillator and to the control inputs of the closing and switching contacts, and the second input of the switching contact is connected to the output of the amplifier. l P