SU136788A1 - The method of suppressing impulse noise in FM radio reception using the control of the resonant frequency of the circuit - Google Patents

The method of suppressing impulse noise in FM radio reception using the control of the resonant frequency of the circuit

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Publication number
SU136788A1
SU136788A1 SU644947A SU644947A SU136788A1 SU 136788 A1 SU136788 A1 SU 136788A1 SU 644947 A SU644947 A SU 644947A SU 644947 A SU644947 A SU 644947A SU 136788 A1 SU136788 A1 SU 136788A1
Authority
SU
USSR - Soviet Union
Prior art keywords
circuit
control
frequency
impulse noise
resonant frequency
Prior art date
Application number
SU644947A
Other languages
Russian (ru)
Inventor
А.П. Зеленин
Original Assignee
А.П. Зеленин
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by А.П. Зеленин filed Critical А.П. Зеленин
Priority to SU644947A priority Critical patent/SU136788A1/en
Application granted granted Critical
Publication of SU136788A1 publication Critical patent/SU136788A1/en

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Description

Известные способы подавлени  импульсных помех при ЧМ радиоприеме с применением управлени  резонансной частотой контура сигналом с выхода частотного детектора, в котором сигнал подают на реактивную лампу, включенную параллельно контуру, не могут обеспечить подавление высокочастотных составл ющих спектра помех.The known methods for suppressing impulse noise during FM radio reception using control of the resonant frequency of the circuit by a signal from the output of the frequency detector, in which the signal is fed to a jet lamp connected in parallel to the circuit, cannot suppress the high-frequency components of the interference spectrum.

Предлагаемый способ не имеет указанного недостатка, что достигаетс  путем подачи управл ющего сигнала на устройство управлени  через фильтр верхних частот в противофазе с мгновенным значением частоты на резонансном контуре.The proposed method does not have this drawback, which is achieved by applying a control signal to the control device through a high-pass filter in antiphase with an instantaneous frequency value on the resonant circuit.

На чертеже изображено устройство дл  осуществлени  предлагаемого способа.The drawing shows a device for carrying out the proposed method.

Входной сигнал поступает на усилитель высокой частоты 7 и через преобразователь 2 попадает на усилитель 3 про.межуточной частоты и частотный детектор 4. С частотного детектора сигнал поступает не только на вход усилител  5 низкой частоты, но и на вход цепи св зи 6, в качестве которой используетс  фильтр верхних частот и реактивную лампу 7, включенную параллельно колебательному контуру усилител  промежуточной частоты, что позвол ет управл ть резонансной частотой контура в соответствии с выходным напр жением цепи св зи.The input signal is fed to the high frequency amplifier 7 and through the converter 2 enters the amplifier 3 about the intermediate frequency and frequency detector 4. From the frequency detector, the signal goes not only to the input of the low frequency amplifier 5, but also to the input of the communication circuit 6, as which uses a high-pass filter and a jet lamp 7 connected in parallel with the oscillating circuit of the intermediate frequency amplifier, which allows you to control the resonant frequency of the circuit in accordance with the output voltage of the communication circuit.

При соответствующем подборе граничной частоты фильтра верхних частот цепи св зи управл ть резонансной частотой контура будут только более высокочастотные гармонические компоненты, но вивщиес  в результате действи  импульсных помех, а низкочастотные гармонические компоненты, образуемые полезным сигналом, будут задержаны цепью св зи. Управл ющее напр жение подводитс  к реактивной ламне в противофазе с мгновенным значением частоты на резонапсно:м контуре.With an appropriate selection of the cutoff frequency of the high-pass communication circuit, only the high-frequency harmonic components, which are affected by impulse noise, control the resonant frequency of the circuit, and the low-frequency harmonic components formed by the useful signal will be delayed by the communication circuit. The control voltage is supplied to the reactive lamina in antiphase with an instantaneous frequency value at the resonance: m circuit.

Предмет и з о б р е т е и и  Subject and d on and e and

Способ подавлени  импульсных помех при ЧМ радиоприеме с применением управлени  резонансной частотой контура сигналом с выходаMethod for suppressing impulse noise in FM radio reception using the control of the resonant frequency of the circuit by a signal from the output

частотного детектора, отличающийс  тем, что, с целью подавлени  высокочастотный cocтaвл ющиx спектра помех, указанное управление осуихествл ют путем подачи на устройство управлени  управл ющего сигнала через фильтр нижних частот в противофазе с мгновенным значением частоты на резонансном контуре.A frequency detector, characterized in that, in order to suppress the high-frequency component of the interference spectrum, this control is implemented by applying to the control device a control signal through a low-pass filter in antiphase with an instantaneous frequency value on the resonant circuit.

SU644947A 1959-11-23 1959-11-23 The method of suppressing impulse noise in FM radio reception using the control of the resonant frequency of the circuit SU136788A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU644947A SU136788A1 (en) 1959-11-23 1959-11-23 The method of suppressing impulse noise in FM radio reception using the control of the resonant frequency of the circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU644947A SU136788A1 (en) 1959-11-23 1959-11-23 The method of suppressing impulse noise in FM radio reception using the control of the resonant frequency of the circuit

Publications (1)

Publication Number Publication Date
SU136788A1 true SU136788A1 (en) 1960-11-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU644947A SU136788A1 (en) 1959-11-23 1959-11-23 The method of suppressing impulse noise in FM radio reception using the control of the resonant frequency of the circuit

Country Status (1)

Country Link
SU (1) SU136788A1 (en)

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