SU1065878A1 - Device for receiving instructions for control of magnetic tape recorder - Google Patents

Abstract

A POWER RECEPTION COMMUNICATION DEVICE CONTROL DEVICE containing a photodetector, a power source, an amplifier connected to the photoreceiver, a counter whose input is connected to the output of the element AND, the decoder connected to the outputs of the counter, and the power bus connected to the counter and the decoder are different, in order to reduce power consumption and increase noise immunity, it is equipped with a differentiating circuit connected to the power bus, a delay unit, an OR element, a gate pulse shaper, a pulse shaper the initial installation and controlled switch, the input of which is connected to the power source, the output is connected to the power bus, one of the control inputs is connected to the output of the differentiating circuit, and the other to the output of the OR element, and the output of the amplifier is connected to the first input of the AND element to the input of the differentiating circuit, the second input of the element I is connected to the first output of the strobe pulse former, the output of the element I is connected to the input of the delay unit, the output of the delay unit is connected to the input of the strobe pulse former and to the first input ementa OR, the second output gate pulse shaper is connected to the second input of the OR gate and the decoder control input of the pulse input of the initial installation is connected to the power bus and an output - to the input of the counter is reset.

Description

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The invention relates to a magnetic recording technique, namely, control devices using photovoltaic means.

A tape recorder control device containing electromagnets, a system of levers and a microswitch for supplying electromagnets is known. In this device, after the electromagnet is triggered, the power is removed from it by the microswitch when the lever system changes to the hard position 1.

However, in this device, the electromechanical system in a number of practical cases is not sufficiently reliable. Another disadvantage is the need to use a wire line for remote control of electromagnets.

Closest to the present invention is a tape recorder command receiving device comprising a photodetector, a power source, an amplifier connected to the photoreceiver, a counter whose input is connected to the output of the AND element, a decanter connected to the outputs of the counter, and a power bar connected to the counter and decipheror 2

In the known device, an amplifier and a photodetector are also connected to the power bus, so all the elements of the device consume the energy of the source both during the reception of control commands and in the intervals between commands, the latter condition is a disadvantage aggravated by the fact that far fewer breaks between teams. In addition, interference to the input of the device in the intervals between the commands can lead to false switching of the executive elements of the tape recorder.

The purpose of the invention is to reduce power consumption and increase the noise immunity of the device.

This goal is achieved by the fact that a tape recorder command receiving device containing a photodetector, a power source, an amplifier connected to the photodetector, a counter whose input is connected to the output of the AND element, a decoder connected to the outputs of the counter, and a power supply connected to the counter and the decryptor is equipped with a differentiating circuit connected to the power bus, a delay unit, an OR element, a strobe pulse shaper, an initial setup pulse shaper, and a switch controlled by the input th is connected to power source, output - with schinoy power, one of the control inputs connected to the output of the differentiating circuit, and the other - with the release member

OR, while the amplifier output is connected to the first input of the element AND and to the input of the differentiating circuit, the second input of the element AND is connected to the first output of the strobe pulse former, the output of the AND side is connected to the input of the delay unit, the output of the delayer is connected to the strobe pulse former I and with the first input of the OR element, the second output of the strobe pulse former is connected to the second

the input of the OR element and with the input of the control of the descrambler, the input of the pulse shaper of the initial setup is connected to the power supply, and the output - to the zero reset input of the counter.

FIG. 1 shows a block diagram of the proposed device; in fig. 2 - diagrams explaining his work.

The device contains a photodetector 1 and an amplifier 2 connected to a photodetector 1. In a number of cases, for example, when transmitting control commands at a carrier frequency at the output of amplifier 2, a pulse shaper can be switched on. The device also contains a power source 4, to the output of which amplifier 2 and a pulse shaper 3 are connected. The power bus 5 of the remaining nodes of the device is connected via the controlled switch 6 to the power source 4. In addition, the device contains a differentiating circuit 7, the element And 8, the counter 9, decipher 10,

a delay unit 11, an OR element 12, a strobe pulse shaper 13, and an initial pulse shaper 14.

The input of the counter 9 is connected to the output element And 8, and its outputs are connected to

the decoder 10. One of the control inputs of the switch 6 is connected to the output of the differentiating circuit 7, and the other - to the output of the element OR 12. The output of the amplifier 2 through the driver 3 pulses

(or directly, when it is not necessary to use a generator of 3 pulses) is connected to the first input of an element AND 8 and to the input of a differentiating circuit, the second input of the element And 8 is connected to the first output of a generator of pulse 13

gate, the output element And 8 is connected to the input of the delay unit 11, the output of which is connected to the input of the strobe pulse generator 13 and the first input of the OR 12 element, the second output of the strobe pulse generator 13 is connected to the second input of the OR 12 element and the decider control input 10, the input of the initialization pulse generator 14 is connected to the power bus 5, and the output is connected to the zeroing input of the counter 9.

The device operates as follows. In the initial state, the power from source 4 is supplied to amplifier 2, driver 3 pulses and to input of switch 6. When a light pulse is received from a command in photodetector 1, an electrical signal is excited, which after amplifier 2 and driver 3 pulses is fed to input differentiator circuit 7 and the first input element AND 8. The output signal of the differentiating circuit 7 for a short time turns on the controlled switch 6, while the supply voltage is supplied to all elements of the device . setting the counter 9 to the initial state, the output of the strobe pulse generator 13 is supplied with a permitting signal to the second input of the AND element 8, from whose output the signal is fed to the input of the counter 9 and to the input of the delay unit 11. The output signal of the delay unit 11 through the OR element 12 is maintained in the on state by the switch 6 after the termination of the signal at the output of the differentiating circuit 7. When the device elements are in the on state, the command light signals are calculated by the counter 9. If after the end of the next command pulse the next pulse does not arrive the delay time of the block 11, the switch-on switch b signal is removed from the output of the latter, while simultaneously the output of the imaging unit 13 causes a gate pulse, which through ele ent OR 12 is supported on state switch 6 is prohibited from passing signals through the AND gate 8 and razreschaets command transmission from the outputs of the decoder 10 for execution nodes goes into the initial state. The signals on the elements of the device are shown in FIG. 2, where a is the output of amplifier 2; b - the output of the imager 3; in - the output of the driver 14; g - switch output 6; d - output block 11 of the delay; e - the output of the imager 13; g - output of the decoder 10. The invention allows to reduce energy consumption by 80- 85 "/ o. In addition, locking the device through the AND 8 element allows reducing the influence of interference from the operation of high-current tape recorder units.

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Claims (1)

MAGNETOPHONE CONTROL COMMAND RECEIVING DEVICE, comprising a photodetector, a power source, an amplifier connected to a photodetector, a counter whose input is connected to the output of the And element, a decoder connected to the outputs of the counter, and a power bus connected to the counter and decoder, characterized in that, in order to reduce power consumption and increase noise immunity, it is equipped with a differentiating circuit connected to the power bus, a delay unit, an OR element, a strobe pulse shaper, a start pulse shaper installation and controlled switch, the input of which is connected to the power source, the output is connected to the power bus, one of the control inputs is connected to the output of the differentiating circuit, and the other to the output of the OR element, while the output of the amplifier is connected to the first input of the And element and to the input differentiating circuit, the second input of the AND element is connected to the first output of the strobe pulse shaper, the output of the And element is connected to the input of the delay unit, the output of the delay unit is connected to the input of the strobe pulse shaper and to the first input of the OR element, the second _Λ output of the gate pulse generator is connected to the second input of the OR element and to the control input of the decoder, the input of the pulse generator of the initial setting l is connected to the power bus, and the output to the input of the counter zeroing. „ Fig.?