SU1527638A1 - Device for interfacing computer and stereo tape recorder - Google Patents

Abstract

The invention relates to computing and can be used to interface a computer with a stereo sound recorder. The aim of the invention is to increase the rate of exchange of a computer with a stereo recorder. The device contains an output channel 1, an input channel 2, the output channel 1 contains an asynchronous transmitter 3, an EXCLUSIVE OR 4 element, the first counting trigger 5, the first converter 6 square voltage to sinusoid, a frequency divider 7, a HE element 8, the second counting trigger 9, the second converter 10 is a rectangular voltage to a sine wave. Input channel 2 contains the first comparator 11, the first 12 and the second 13 elements EXCLUSIVE OR, the first one-shot 14, the asynchronous receiver 15, the first voltage divider containing the first 16 and second 17 resistors, the delay element 18, the second one-shot 19, trigger 20, the second comparator 21, a second voltage divider containing the third 22 and fourth 23 resistors. The device provides reading and writing information to a stereo recorder, with the information being recorded both on the first and second channels. 1 il.

Description

I;: Chabrete) Ie belongs to the computational program and can be used by 1 cf;, w, or cn the computer with the TBVKO-cell processor.

The goal of Isor; Peteia is to increase the rate of exchange of a computer with a stereo recorder,

The drawing shows the structure; (device circuit,

Ustro1 With - about the output channel and channel 2 input. Channel 1 output Contains acmixpoHHii, 17 transmitter 3, element MCKjn04 Or FR 1SH 4, first s-: summer - 1 trigter 5, first i-type - BPTejjb 6 rectangular voltage at bluetooth, y, divider 7 frequency, element 8 , second counting trigger H, second P1) exponent P for a tri-fian sine wave F sinusoid. Channel 2 of the input content is the first comparator 11, the first 12 and the second 13 elements BOOTLINE OR, the first single vibrator .. 14, the asynchronous receiver 15, the first voltage divider containing the first 16 and second 17 resistors, 18 Japper element: ki, second one-shot 19, trig-sr 20, comparator 21, second voltage, third third 22 and quarter 23 resistors, UstS.1stbo has inputs 24 and 23 li years klyuchevokil 1: iprmatsionny v; progress and output-synchonization of EEM, outputGHz . 26 and 27 for connecting to the first and second analog inputs of a stereo recorder, inputs 23 and 29 for connecting the first h of the second analog stereo tape recorder, output 30 for connecting a multi-information input of a computer.

VcTpcacT -: o works as follows,

E dir, n -. (E - output data of the cychis literary G. Maui Mi-. I take ir-shaped 2-D input, connect to the informatics-1 input of the asynchronous transmitter 1 whose bytes with a frequency of less than 1C are frequency frequencies that are sent to code 23 sc, 5g, dwg; 7); 1) 1 successive asynchronous from the start of the first ti stopovi bits from the asynchronous g; transmitter 3 and arrive at the third input of the first element of the ISK.GPPCHL10; 1 EE IlTni 4, at the second input of which post AET is synchronized

5 Q 5 o

,, „

the frequency from the output of the divider 7 frequency, As a result, at the output of the first element EXCLUSIVE OR A, a M1 signal is generated for the two-phase (Manchester) modulation.

Counting triggers 5 and Q switch each, respectively, on the rise of the gaim and descending Lronts of the indicated two-part signal from the output of the first element EXCLUSIVE OR MORE OR 4, two sequences of the three-frequency signal, the maximum frequency of which is two times lower than in the two-frequency signal o signal

From the output of converters 6 and 10 of a rectangular voltage to a sinusoid through a1, the analog outputs 26 and 27 of the device, the information is fed to the inputs of a stereo recorder,

due to the division of the information flow into two channels with a twofold increase in the rate of exchange of a computer with a device, the maximum frequency of the signal in each channel of the stereo recorder is equal to the maximum frequency of the corresponding signal when exchanged in the Mano mode,

In the input mode, the processed information from the stereo recorder through the analog inputs 28 and 29 of the device enters the comparators 1 and 21, at the outputs of which pulses with steep edges are formed. These pulses are fed to the inputs of the second element EXCLUSIVE OR 13, at the output of which an initial 2-frequency signal is formed, similar to the signal at the output of the element EXCLUSIVE 1 OR 4, the Pointer signal is fed to the inputs of the first element EXCLUSIVE OR 12 directly and through the delay element 18 is converted into short pulses corresponding to each front of the original signal. The duration of these pulses is equal to the delay time of the delay element 18; From the output of the EX ELIMINATELY KPI 12 element, the pulses arrive at the input of the restarted The first one-shot 14, the time of the master circuit of which is set to 0.75 periods of changing one bit of consecutive asynchronous packets. At the output of the first one-shot 14, pulses appear TOjiLKf) with changes in the value of the bits of consecutive asynchronous allocations, and each time the trigger 20, C

a single output of the trigger 20 to the information input of the asynchronous receiver 15 receives the recovered sequence of asynchronous packages. As a result of this with. the output of the asynchronous receiver 15, synchronized by the reference frequency from the input 25 of the device's synchronization, through the output 30 of the information of the device, the computer reads the data read from the stereo tape recorder,

The initial state of flip-flop 20 is set by the first start bit of each data block with a signal from the output of the second one-shot 19; The timing of the second single-vibrator 19 is set to 12 or more periods of changing one bit of the sequence

is the output of the device for connecting to the first analog input of the stereo recorder, the first analog input of the input channel is the input of the device for connecting the first analog output of the stereo recorder, and the output channel contains an asynchronous transmitter, an element of the ACCND-0-E, the first converter of a rectangular voltage a sinusoid and a frequency divider, and in the output channel, the channel information input is connected to the information input of the asynchronous transmitter, the output of which is connected to the first input of the element and ISK1P "CHASCHEE 1PI, the second input of which synchronization R1hod asin: ronnogo transmitter connected to the output delite5

25

thirty

Max. 20 liters of frequency, whose input is the number of periods during which the bits do not change, 11 (for all units in the data byte, one in check bit and 2 stop bits). Thus, the second one-shot 19 restarts during the entire data block, holding at its output the work enable signal of the D-flip-flop 20 from the signals from the output of the first one-shot 14, During the inter-block pause when the output of the asynchronous transmitter is 3 units, and due to no information changes the first one-shot 14 does not restart the second one-shot 19, the last after the setup time of its RC circuit sets the trigger 20 to the unit state by a single input, which ensures its correct polarity d the arrival of the start bit of the next block of consecutive asynchronous parcels.

Claims (1)

Invention Formula A device for interfacing a stereo tape recorder computer containing an output channel and an input channel, the output information input information input being a device input for connecting a computer information output, the information output channel input being an output device for connecting a computer information input, output channel synchronization inputs and a channel the inputs are the input of the device to connect the output of the synchronization of the computer, the first analogue one; to anal output 35 40 45 50 55 the synchronization input of the channel, the first converter of the rectangular voltage to the sinusoid is connected to the first analog output of the channel of the input, the input channel c holds the first comparator, the first voltage divider, the first element, the first, the second single rhetor, trigger and an asynchronous receiver, the first analog input of the input input being connected to the first input of the first comparator whose second input is connected to the middle of the first voltage divider, the first output of which is connected to the quina The device’s second potential, the second output of the first voltage divider is connected to the output of the first comparator, the output of the delay element is connected to the first input of the first element L EXCLUSIVE (CG: LP And), through which the first one device connects to the trigger synchronization input and to the input the second one-oscillator, the output of which is connected to a single trigger input, zero and one output - which is connected respectively to the information trigger input and to the asynchronous information input -: th receiver, synchronization input and output which are connected respectively to the synchronization input and to the information output channel of the input channel, characterized in that, in order to increase the speed of the computer exchange with the stereo tape recorder (one, the second analog input channel input is the device input for 0 20 l of frequency whose input is five 0 five 0 five the synchronization input of the channel, the first converter of the rectangular voltage to the sinusoid is connected to the first analog output of the channel, the input channel contains the first comparator, the first voltage divider, the first element EXCLUDE DEE OR, the delay element, the first, the second dual radio, trigger and asynchronous the receiver, the first analog input of the input input is connected to the first input of the first comparator, the second input of which is connected to the middle of the first voltage divider, the first output of which is connected with a zero potential potential device, the second output of the first voltage divider is connected to the output of the first comparator, the output of the delay element is connected to the first input of the first element l EXCLUSIVE (CG: LP And, the output of which is connected to the trigger synchronization input through the first one and the input of the second one-shot, the output of which is connected to the single trigger input, zero and single output - which is connected respectively to the information input of the trigger and to the information input asynchronous -: th receiver, sync input which output is connected respectively to the synchronization input and to the information output channel of the input channel, characterized in that, in order to increase the exchange rate of the computer with the stereo (y, the second analog input channel input is the device input for connecting the second analog output stereo recorder, BTopofi analog output channel output - device output for connecting the second analog stereo recorder input, the first second counting triggers, the element NOT and the second conversion are entered into the output channel the device of the rectangular voltage in a sinusoid, and in the output channel the output of the SPARKLINGING OR element is connected to the input of the first counting trigger and through the element NOT to the input of the second counting trigger, the outputs of the first, second counting trigger are connected to the inputs of the first one, the second transducer of the rectangular voltage into a sinusoid, the output of which is connected to the second analog output of the output channel, and entering the input channel There is a second comparator, a second voltage divider and a second element EXCLUSIVE OR, and in the input channel the second analog input of the channel is the first input of the second comparator, the second input of which is connected to the middle output of the second voltage divider, the first output of which is connected to the zero potential bus device, the output of the second comparator is connected to the second output of the second voltage divider and to the first input of the second element EXCLUSIVE OR, the second input of which is connected to the output of the first comparator, output the second EXCLUSIVE OR gate is coupled to an input of a delay element and to a second input of the first exclusive OR element.