SU453707A1 - FREQUENCY-PULSE INTEGRATOR - Google Patents

Description

one

The invention relates to the field of automation and computer technology, in particular, to devices for integrating pulse frequency signals.

Known frequency-pulse integrator, containing triggers, valves, pulse generator and cumulative counter.

The disadvantages of this device include the lack of a signal reaching the number formed in the cumulative counter, a predetermined threshold level, which makes it impossible to use it as a frame marker detector representing n pulses with a tracking period Tc located within one of the horizontal pulse tracking periods Tc, moreover, the number of frame marker impulses placed between two line pulses is:

7c 1

n - - 1.

T

The aim of the invention is to eliminate this drawback.

This goal is achieved by introducing into the integrator a threshold circuit and a frequency divider that are associated with other nodes of the device, which allows the detection of a personnel marker by counting the number of input pulses

signal within the integration interval, equal to the period of following line pulses Tc. FIG. 1 is a block diagram of an integrator; in fig. 2 - time diagram of his work.

The pulse-frequency integrator contains trigger 1 connected by the first installation input to the device input and pulse input gate 2. The trigger output is connected to the potential inputs of gates 2 and 3.

The pulse input of the valve 3 is connected to the output of the generator 4 reference pulses.

The outputs of the valves 2 and 3 are connected respectively to the counting input of the cumulative counter 5 and the input of the frequency divider 6 connected by the output to the zeroing input of the counter 5 and the first input of the threshold circuit 7,

the second input of which is connected to the output of the bin 5. The output of the threshold circuit 7 is connected to the output of the device and the second installation input of the trigger 1. The device operates as follows.

The input signal (Fig. 2a), arriving at the input of the trigger 1, rears it in one state (Fig. 26), opening the valves 2 and 3. At the same time, the pulses from the generator 4 through the valve 3 arrive at

The input of frequency divider 6, the division factor of which is set so that it produces impulses with a period equal to the period of the line sequence and with an initial delay relative to a positive voltage drop at the output of trigger 1.

If there are no personnel marker pulses, the accumulative counter 5 will receive only one pulse through valve 2 during the time equal to the period of horizontal pulses. At the end of the interval Tc, the counter 5 will impulse with a pulse from the output of frequency divider 6, which simultaneously at the end of each integration interval (accumulation) polls the threshold circuit 7. The number in the counter 5 will be less than the trigger level of circuit 7.

Upon the arrival of the frame marker pulses, swept up within one of the pulse periods of the rows, a number is formed in counter 5 (FIG. 2d) equal to the number of frame marker pulses. A pulse from the output of frequency divider 6 polls the threshold circuit 7 and zeroes the counter 5, while the output of circuit 7 generates a pulse of the frame marker capture (Fig. 2e), which sets trigger 1 to its initial state.

The next pulse of a lower case sequence sets the trigger to a single

state, and the device starts the next detection cycle, its frame marker.

In addition to detecting frame marker pulses in telemetry information processing systems, the integrator can be used to detect abnormal changes in the frequency of pulsed signals with a known tracking period.

Subject invention

A pulse frequency integrator containing a trigger, two valves, a pulse generator and a cumulative counter, the input of which is connected to the output of the first valve connected by the first input to the device input and the second input to the trigger output and the first input of the second valve, characterized in that in order to expand its functionality, a threshold circuit and a frequency divider are introduced in it, the input of which is connected to the output of the second valve connected to the output of the pulse generator by the second input, the output of the frequency divider Inonii counter with the reset input and

the first input of the threshold circuit, the second input of which is connected to the output of the counter, and the output of the threshold circuit is connected to the first input of the trigger connected by the second input to the input of the device.

,

FIG. 1 2au.Va.gt) personnel martron impulses

d

p inpilsob personnel marker

FIG. 2