SU1387205A1

SU1387205A1 - Telephone discrete data transceiver

Info

Publication number: SU1387205A1
Application number: SU864101648A
Authority: SU
Inventors: Борис Исаакович Кусовский; Эмиль Львович Лайкам; Михаил Мордкович Поташник; Владимир Константинович Ушаков
Priority date: 1986-06-10
Filing date: 1986-06-10
Publication date: 1988-04-07

Abstract

Изобретение относитс к радиотехнике. Цель изобретени - повышение помехоустойчивости и исключение вли ни нелинейности микрофона. Устр-во содержит микрофон 1, усилитель 2 напр жени , демодул тор 5, громкоговоритель 6, усилитель 7 мощности , модул тор 8. Дл достижени цели введены компрессор 3, фильтр 4, г-р 9 импульсов , блок 10 управлени модул тором и блок 11 сопр жени . Устр-во может работать в двух режимах: в режиме преобразовани акустических сигналов в эл. сигналы и в режиме преобразовани дискретной информации , представленной эл. сигналами, в акустические сигналы. Компрессор 3 (устр-во сжати динамического диапазона) используетс дл устранени вли ни параметров элементов, участвуюш,их в акустическом контакте . Амплитуда сигнала компрессора 3 на выходе посто нна. Фильтр 4 предназначен дл выделени из принимаемого сигнала частот , соотв. передаваемым двоичным сигналам . Г-р 9 импульсов выдает последовательность импульсов, котора поступает в блок 10, который предназначен дл выдачи сигнала установки в модул тор 8. С выхода блока 11 поступают частотно-модулированные сигналы на усилитель 7. Если источник информации выдает параллельный код, то последний в блоке 11 преобразуетс в последовательный код. 1 ил. с SS (ЛThe invention relates to radio engineering. The purpose of the invention is to increase noise immunity and eliminate the effect of microphone nonlinearity. The device contains microphone 1, voltage amplifier 2, demodulator 5, loudspeaker 6, power amplifier 7, modulator 8. Compressor 3, filter 4, r-r 9 pulses, modulator control unit 10 and unit are entered to achieve the goal. 11 mates The device can operate in two modes: in the mode of converting acoustic signals to el. signals and in the mode of conversion of discrete information provided by e-mail. signals, acoustic signals. Compressor 3 (dynamic range compression device) is used to eliminate the influence of the parameters of the elements involved in their acoustic contact. The amplitude of the compressor 3 signal at the output is constant. Filter 4 is designed to extract frequencies from the received signal, respectively. transmitted binary signals. G-9 of pulses gives a sequence of pulses, which goes to block 10, which is designed to give a setting signal to the modulator 8. From the output of block 11, frequency-modulated signals are sent to the amplifier 7. If the source of information gives a parallel code, then the last one in the block 11 is converted to a serial code. 1 il. with SS (L

Description

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Изобретение относитс к радиотехнике и св зи и может быть использовано в системах телефонной св зи, комбинированных с системами передачи данных.The invention relates to radio engineering and communications and can be used in telephone communication systems combined with data transmission systems.

Цель изобретени - повышение помехоустойчивости и исключение вли ни нелинейности микрофона.The purpose of the invention is to increase noise immunity and eliminate the effect of microphone nonlinearity.

На чертеже приведена структурна электрическа схема устройства приемопередачи дискретной информации по телефону.The drawing shows a structural electrical circuit of the device for receiving and transmitting discrete information by telephone.

Устройство содержит микрофон 1, усилитель 2 напр жени , компрессор 3, фильтр 4, демодул тор 5, громкоговоритель 6, усилитель 7 мощности, модул тор 8, генератор 9 импульсов, блок 10 управлени модул тором и блок 11 сопр жени .The device comprises a microphone 1, a voltage amplifier 2, a compressor 3, a filter 4, a demodulator 5, a loudspeaker 6, a power amplifier 7, a modulator 8, a pulse generator 9, a modulator control unit 10 and an interface unit 11.

Устройство работает следующим образом.The device works as follows.

Устройство может работать в двух режимах: в режиме преобразовани акустических сигналов в электрические сигналы и в режиме преобразовани дискретной инфорThe device can operate in two modes: in the mode of converting acoustic signals into electrical signals and in the mode of converting discrete information

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гического нул (1700 Гц) от фильтров 4 и выдает логические сигналы последовательного кода. Сигналы с демодул тора 5 поступают на вход а блока 11, где преобразуютс в дискретные электрические сигналы (параллельный код), а затем поступают потребителю, например ЭВМ.zero (1700 Hz) from filters 4 and outputs logical signals of a sequential code. The signals from demodulator 5 are fed to the input of block 11, where they are converted into discrete electrical signals (parallel code), and then fed to a consumer, such as a computer.

В режиме преобразовани дискретной информации (последовательного кода) в акустические сигналы последовательный код с выхода б блока 11 поступает на модул тор 8, с выхода которого частотно модулированные сигналы поступают на усилитель 7, а затем эти усиленные сигналы преобразуютс в аку- тические сигналы громкоговорителем 6.In the mode of converting discrete information (serial code) into acoustic signals, the serial code from output b of block 11 goes to modulator 8, from which frequency-modulated signals go to amplifier 7, and then these amplified signals are converted to acoustic signals by loudspeaker 6.

Генератор 9 импульсов выдает последовательность импульсов. Эта последовательность поступает в блок 10 управлени , который предназначен дл выдачи сигнала установки в модул тор 8 и вырабатывает необходимую частоту дл работы модул томации , представленной электрическими сиг- - ра 8, предназначенного дл преобразовани последовательного кода информации, представленного логическими сигналами в последовательность двух частот (1700 Гц и 1300 Гц), соответствующую логической единалами , в акустические сигналы.The pulse generator 9 generates a sequence of pulses. This sequence enters control unit 10, which is designed to emit a setup signal to modulator 8 and generates the necessary frequency for the modulation, represented by electrical signals 8, to convert the serial information code, represented by logic signals, into a sequence of two frequencies ( 1700 Hz and 1300 Hz), corresponding to logical units, in acoustic signals.

В режиме преобразовани акустических сигналов в дискретную информацию акустические сигналы воспринимаютс микрофони последовательного кода информации, представленного логическими сигналами в последовательность двух частот (1700 Гц и 1300 Гц), соответствующую логической еди1 и преобразуютс в напр жение 25 логическому нулю. Далее сигналIn the mode of converting acoustic signals into discrete information, acoustic signals are perceived by microphones of a serial information code, represented by logical signals into a sequence of two frequencies (1700 Hz and 1300 Hz) corresponding to logical one and converted to a voltage of 25 logical zero. Next signal

поступает в усилитель и воспроизводитс громкоговорителем 6. Если источник информации выдает параллельный код, последний в блоке 11 преобразуетс в последовательный код.enters the amplifier and is reproduced by the loudspeaker 6. If the source of information issues a parallel code, the latter in block 11 is converted into a serial code.

Claims

Invention Formula

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electric current amplified by the amplifier 2, then the electrical signals are fed to the input of the compressor 3.

Compressor 3 (dynamic range compression device) is used to eliminate the influence of the parameters of elements involved in acoustic contact (variation in the parameters of the carbon microphone of the handset, the difference in the installation of the handset, various configurations of the handset of various types of telephone sets). The amplitude of the compressor 3 signal at the output is constant, despite changes in the amplitude of the input signal within wide limits. From the output of the compressor 3, the signal is fed to the input of the filter 4, which is intended to extract frequencies from the received signal corresponding to the transmitted binary signals. A single fixed frequency (for example, 1300 Hz) corresponds to a logical unit, and another fixed frequency (for example, 1700 Hz) corresponds to a logical zero.

Demodulator 5 is designed to convert a partially modulated signal into serial code logic signals. Demodulator 5 receives signals corresponding to the transmission frequency of a logical unit (1300 Hz) and the transmission frequency of 30

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A telephone transceiver device containing a demodulator, a serially connected modulator, a power amplifier and a loudspeaker, as well as a serially connected microphone and a voltage amplifier, characterized in that, in order to improve the noise immunity and eliminate the influence of the nonlinearity of the microphone, a matching unit is inserted serially connected pulse generator and control unit of the modulator, as well as a compressor and a filter connected in series, the output of which is through connected to the input of the interface, the output of which is connected to the combined input of the modulator and the second input of the control module of the modulator, the first and second outputs of which are connected to the corresponding first and second inputs of the modulator, and the output of the voltage amplifier is connected to the input of the compressor .

zero (1700 Hz) from filters 4 and outputs logical signals of a sequential code. The signals from demodulator 5 are fed to the input of block 11, where they are converted into discrete electrical signals (parallel code), and then fed to a consumer, such as a computer.

In the mode of converting discrete information (serial code) into acoustic signals, the serial code from output b of block 11 goes to modulator 8, from which frequency-modulated signals go to amplifier 7, and then these amplified signals are converted to acoustic signals by loudspeaker 6.

The pulse generator 9 generates a sequence of pulses. This sequence enters the control unit 10, which is designed to issue a setup signal to the modulator 8 and generates the necessary frequency for the modulator 8 to convert the serial information code, represented by logical signals into a sequence of two frequencies (1700 Hz and 1300 Hz), corresponding logical one5

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A telephone transceiver device containing a demodulator, a serially connected modulator, a power amplifier and a loudspeaker, as well as a serially connected microphone and a voltage amplifier, characterized in that, in order to improve the noise immunity and eliminate the influence of the nonlinearity of the microphone, a matching unit is inserted serially connected pulse generator and control unit of the modulator, as well as a compressor and a filter connected in series, the output of which is through connected to the input of the interface, the output of which is connected to the combined input of the modulator and the second input of the control module of the modulator, the first and second outputs of which are connected to the corresponding first and second inputs of the modulator, the output of the voltage amplifier connected to the compressor .