SU1612305A2 - Device for input of data from compact-cassette audio recorder into digital computer - Google Patents

Abstract

The invention relates to computing and is an improvement of the device according to a. USSR N 1427374. The purpose of the invention is the expansion of the field of application due to the possibility of determining the initial phase of the readable analog signal. The device contains switches of the upper 1 and lower 2 levels, digital analyzer 3 frequencies, three counters 4, 5, 10, four flip-flops 6, 13 - 15, three elements And 7-9, counting trigger 16, register 11, delay element 12, inverting amplifier 17, analog switch 18. The goal is achieved by fixing in the trigger 14 or 15 the initial phase of the input analog signal. 1 il.

Description

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The invention relates to computing and is an improvement of the device according to the author. No. 1427374.

The purpose of the invention is to expand the scope of use due to the possibility of determining the initial phase of the readable analog signal.

The drawing shows a block diagram of the device.

The device contains switches of up to 1 and lower 2 levels, a digital analyzer 3 frequencies, containing counters 4 AND 5 and trigger 6, as well as elements 1 / 17-9, counter 10, register 11, element 12 delayed | and, triggers 13–15, counting trigger 16, Inverting amplifier 17, analog Immutator 18, reference frequency input 19, Information (analog) input 20, information (digital) output 21, synchronizing output 22, output 23 of the sign of the beginning of the file.

The input device works as follows.

Recorded information on a cassette recorder comes through input 20 to (First input of analog switch 18 i / i "jiepes inverting amplifier 17 to the second input of switch 18, the output of which is connected to inputs of switches of upper J1 and lower 2 levels. If inverted pulses (i.e., the pulsation begins with a negative half-period), the switch 2 of the lower level is triggered first and the pulse from its output converts the trigger 15 into a single rotation, this prevents the passage of signals through the AND 8 element and permits if the inertiated tax signal passes through the switch 18. IF a non-inverted impulse arrives at input 20, the upper level switch 1 is triggered first, the impulse 14 converts the trigger 14 to zero state, and the signal 9 switching trigger 15, i.e. switch 18 does not switch. The pulse from the output of switch 1 sets trigger 6 to the zero state, trigger 13 to the one state, and it also records the number twelve in binary code in the counter to 4. The contents of the counters begin to be read by the reference frequency pulses from the input 19 of the device. As soon as the transfer pulse is output at the output of the counter 4, the trigger 13 is set to the zero state, and the number 5 is written to the counter 5 in the binary code and its contents will begin to be read by the reference frequency pulses. Pulse for transfer of the counter Installs the trigger 6 into the unit state, the counter 10 records the number eight in the binary code, and the trigger 16 switches from the unit state to the zero state. So

Thus, when reading service information from the tape recorder, the input device output 23 will be logical level 1, otherwise logical level O. With the arrival at the input of 20 data messages, trigger 6 is not set to one and the information from trigger 13 with offset is copied to register 11, and if at the input 20 a pulse with a frequency of 2.5 kHz, then level 11 is entered into register 11

logical 0, if 5 kHz, then the logical level 1. After the register is filled, i.e. eight shifts will occur, the transfer impulse from counter 10 goes to output 22 and overwrites information from outputs 21 and 23 to the digital computer, and also triggers 15 and 14 are reset.

Claims (1)

Invention Formula A device for inputting information from a cassette tape recorder of a sound recording to a digital computer, auth.St. No. 1427374, characterized in that, in order to expand the scope of account of the ability to determine the initial phase of the readable analog signal, it additionally contains an inverting amplifier, an analog switch, the first and second additional elements Both the first and second additional triggers, and the installation input into the first additional trigger and the installation in 1 of the second additional trigger are connected respectively to the outputs of the first and the second additional elements And the first inputs of the first and second additional elements And are connected respectively with. the outputs of the upper level switch and the lower level switch, the second input the first additional element And is connected to the inverse output of the second additional trigger and the first control input of the analog switch, the second control input and the first information the input of which is connected respectively to the direct output of the second additional trigger and the output of the inverting amplifier, the input of which is connected to the second information input of the analog the switch and the information input of the device, the output of which is connected to the inputs of the upper level switch and the lower level switch, the output of the first additional trigger is connected to the second input of the second element And, the input The settings in 1 of the first additional optional trigger are connected to the output trigger and the installation input to O of the second arrival of the meter.