SU570216A1 - Audio signal receiver - Google Patents

Description

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The invention relates to telephony and is used to receive signals by means of I zoom |} and is also used to convert them into DC signals.

Known receiver tonal signals, 5 containing a series-connected amplifier-shaper and one-shot, the output of which is connected to the input of the amplifier shaper, as well as a series-connected selector for duration, time relay Q. and the Executive unit.

However, the well-known receiver tonal bignup has insufficient protection from complex triggers.

The purpose of the invention is to increase the severity of false positives.

To do this, a receiver with signals connected to the amplifier amplifier 20 and serially connected selector, a time relay and an execution unit, a trigger and two circuits, each of which successively connect the integrator and 25

threshold block. The output of the amplifier of the imager is connected to the counting input of the trigger, the outputs of which are connected to the inputs of the respective integrators, and the outputs of the threshold blocks are connected to the input of the selector in duration.

The drawing shows the structural electrical circuit proposed by the tone receiver.

The receiver of tonal signals contains amplifier-shaper 1, one-shot 2, trigger 3, two integrators 4, two threshold blocks 5, a selector with a duration of 6, a time relay 7, and an executive block 8. The driver shaper 1 is connected in series with the single-shot ohm 2, the output of which connected to the input of the amplifier-former. The selector for the duration of 6, time relay 7 and the Executive unit 8 are connected sequentially. The integrators 4 are connected in series with the threshold blocks 5. The output of the amplifier-mapper is connected to the counting input of the trigger 3, the output of which is connected to the 6 inputs of the respective integrators 4, and the threshold outputs. , 6faoK (m 5 connected to the input of the selector for a duration of 6. The reception of tonal signals in the reception mode in a blunt manner is operated by the next rhinestone. The incoming signals of the P-form roiatelv 1 signals / occupied by usi in the wake are inputted The square pulse formed by the accelerator 1: the front triggers the one-shot 2, which, acting on the other input of the amplifier-forming 1, locks it for a time a little longer between the sendings of the signal is occupied. the coder 1, starting from the second signal sending, is busy, a sequence of square impulses is formed, the pauses between which overlap with the control of the pulses of the single coil 2. Each impulse following the force of the t-center |) actuator 1, triggers the leading edge one steady state to another. Thus, on the direct and inverse outputs of trigger 3, sequences of square pulses are formed with a duty cycle of 2. The pulse duration is equal to the signal follow-up period and is fed to the input of the amplifier 1. Pulses from the direct and inverse outputs of trigger 3 are fed to the inputs integrators 4. They provide for resetting to the initial state along the leading edge of the incoming pulse. Therefore, the integration of each I1 | 1 pulse starts noQrte-installation of the integrator 4 in the initial state. As a result of integration, from the outputs of the integrators 4, the sequences of triangular pulses with the same rise and fall times are supplied to the inputs of the threshold blocks 5. The pulse at the output of the threshold block appears only when there is no voltage at the output of the integrator 4 connected to it. Thus, when a signal arrives at the input of the amplifier-1, signals are taken, then a sequence of short pulses appears at the output of each threshold block 5, since the output voltage of the integrators 4 only takes a short time zero. From the outputs of the threshold blocks 5, the pulses arrive at the input of the selector for a duration of 6, which is tuned to a pulse duration equal to the maximum possible difference I of the duration of adjacent periods. The signal flows are busy. Since the duration of the pulses arriving at the selector for a duration of 6 in the mode of receiving signals is sometimes small, they do not pass through the selector for a duration of 6, and time relay 7 is not set to its initial state. Thus, after the time required for analysis Tone driven (sec), time relay 7 is activated and the executive unit 8 is activated. When receiving a speech signal and noise on the amplifier block 1, a sequence of pulses of different duration is formed that does not have transducer therefore, from the outlets of trigger 3, the integrators 4 receive impulses with variable duty cycle. As a result, at the outputs of the integrator 4, pulse sequences appear with intervals between nm,; equal to the difference in the durations of adjacent periods of received speech signals or interference. Thus, on the threshold blocks 5, pulses are formed that are equal in duration to the difference in the periods of adjacent signals. So ; As a speech signal or interference do not have a periodicity, pulses with durations longer than selectivity selectors for the duration of 6 are received at the selector 6 for the duration: 6 pulses from the selector output for the duration of the selector 6, which set the relay time 7 is reset, therefore, the execution unit 8 is not included. When receiving a call control signal on the forward and inverse outputs of flip-flop 3, pulse sequences are formed whose pulse duration and pauses are equal to each other and equal to the length of the follow-up control signal period. The integration time is limited by the maximum possible duration of the signal follow-up period. Tof Since the follow-up signal period is much longer, the outputs of the integrators 4 form a sequence of pulses with long pauses. The presence of such pauses entails the triggering of threshold blocks 5, the outputs of which generate pulses with a duration longer than the selector selector duration 6. At its output a signal appears regularly that sets the time relay 7 to its initial state,. therefore, the execution unit 8 is not included. When a signal is received, the readiness of the station to dial from the output of amplifier 1 at the input of the thrunger 3 pulses is not received. At the output of one of the integrators 4, after integrating for the entire time of the signal the station is ready for dialing, the signal is set to zero. The input of the time relay 7 is given a signal

holding relay 7 times in the initial state. In the same way, the turn of time 7 is kept in the initial state in the absence of any signals at the input of the receiver of the tonal signals.

Claims (1)

Invention Formula A receiver of tones, containing a series-connected amplifier-shaper and a one-shot, the output of which is connected to the input of the amplifier-shaper, as well as sequentially connected selector in duration, time relay and control unit, which is different because, in order to increase protection from false alarms, a trigger and two circuits are inserted, each of which holds the serially connected integrator and threshold unit, while the output amplifier 1 connected to the counting input of the trigger, the outputs of which are connected to the inputs of the respective integrators, and the outputs of the threshold blocks are connected to the input of the selector in duration.