SU1647897A1 - Signal-variation-rate-to-time-interval converter - Google Patents

Abstract

The invention relates to a measurement technique and can be used in the construction of various digital measuring instruments. The invention allows to expand the field of application due to the fact that trigger 1 is introduced into the device containing key 3 and integrator 4. Comparison element 2 and null organ 5. The introduction of these blocks allows generating output pulses whose duration is proportional to the rate of change of the input signal both with increasing and decreasing, as can be judged by the output signal of comparison element 2. 2 Il.

Description

WITH

WITH

Schig.1

ON

VI

00 VI

The invention relates to a measurement technique and can be used to construct various digital measuring instruments.

The purpose of the invention is to expand the scope.

FIG. 1 shows a functional diagram of the converter; in fig. 2 - time diagrams that show his work.

The converter contains trigger 1, element 2 of comparison, key 3, integrator 4, null organ 5, input bus 6, bus 7 clock pulses, output bus 8.

The Converter operates as follows.

In the initial state, in the absence of an input signal, the integrator 4 is discharged, the potentials at the inputs of the null-oogan 5 are equal and its output is in active mode, keeping trigger 1 in the zero state upon receipt of clock pulses, i.e. on the output bus 8 pulses are missing.

When an input signal appears, i.e. changing the potential on the input bus 6 relative to the output of the integrator 4, the zero-organ 5, releases the trigger 1, which is set to one with the arrival of the clock pulse, the closure of the key 3. neither the output of element 2 (ascending or decreasing), tends to the input potential. When the integrator reaches 4 levels of the input signal, the output signal of the zero-organ sets trigger 1 to zero. Key 3 is disconnected and integrator 4 goes into

%BUT

storage mode. With the arrival of the next clock pulse, the conversion cycle is repeated.

The duration of the output pulse is proportional to the time constant of the integrator and the potential difference between the input bus and the integrator output at the time of arrival of the clock pulse. Due to the fact that the period of clock pulses

is stable, then the duration of the output pulses is proportional to the rate of change (torsional) of the input signal, and both with increasing input signal and with decreasing, which can be judged by

Claims (1)

output signal of reference element 2. The invention The converter of the rate of change of the analog signal in the time interval, containing an integrator, whose input connected to the analog output of the key, the control input of which is connected to the output bus, characterized in that, in order to expand the field of application by making it possible to measure the rate of change of the decreasing input signal, a comparison element is introduced. null organ and trigger, the setup input in which T is the clock pulse bus, the output is the output bus, and installation in O connect the output of the zero-organ, the first input of which is combined with the first input of the comparison element and is the input bus, the output of the comparison element is connected to the analog input key, and the second input is combined with the second input of the zero-body and is connected to the output of the integrator.