RU94042785A - Detector of signals with frequency telegraphy - Google Patents

Detector of signals with frequency telegraphy

Info

Publication number
RU94042785A
RU94042785A RU94042785/09A RU94042785A RU94042785A RU 94042785 A RU94042785 A RU 94042785A RU 94042785/09 A RU94042785/09 A RU 94042785/09A RU 94042785 A RU94042785 A RU 94042785A RU 94042785 A RU94042785 A RU 94042785A
Authority
RU
Russia
Prior art keywords
output
threshold device
input
detector
filter
Prior art date
Application number
RU94042785/09A
Other languages
Russian (ru)
Other versions
RU2115250C1 (en
Inventor
В.И. Чугаева
Л.А. Волошин
Ю.И. Гришкин
Original Assignee
Воронежский научно-исследовательский институт связи
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 Воронежский научно-исследовательский институт связи filed Critical Воронежский научно-исследовательский институт связи
Priority to RU94042785A priority Critical patent/RU2115250C1/en
Publication of RU94042785A publication Critical patent/RU94042785A/en
Application granted granted Critical
Publication of RU2115250C1 publication Critical patent/RU2115250C1/en

Links

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Noise Elimination (AREA)

Abstract

FIELD: radio engineering. SUBSTANCE: detector may find use in receivers of frequency telegraphy. It has intermediate frequency filter, limiter which output is connected via two branches, each incorporating channel filter and nonlinear element, to inputs of subtracter. Output of subtracter is connected through low-pass filter to input of first threshold device. Output of first threshold device is connected to computing circuit which second input is coupled to output of second threshold device. Output of intermediate frequency filter is also connected to amplifier which output is connected through third nonlinear element to band-pass filter. Output of band-pass filter is coupled through detector to input of second threshold device. EFFECT: enhanced functional reliability and stability.

Claims (1)

Изобретение относится к области радиотехники и может найти применение в приемных устройствах частотной телеграфии. Устройство содержит последовательно соединенные ФПЧ, ограничитель, выход которого соединен через две ветви, каждая из которых содержит канальный фильтр и нелинейный элемент, с двумя входами вычитателя. Выход вычитателя через ФНЧ соединен с входом первого порогового устройства. Выход первого порогового устройства соединен с решающей схемой, второй вход которой соединен с выходом второго порогового устройства. Выход ФПЧ соединен также с усилителем, выход которого через третий нелинейный элемент соединен с полосовым фильтром. Выход полосового фильтра через детектор соединен с входом второго порогового устройства.The invention relates to the field of radio engineering and may find application in receiving devices of frequency telegraphy. The device contains a series-connected PLL, a limiter, the output of which is connected through two branches, each of which contains a channel filter and a nonlinear element, with two inputs of the subtractor. The subtractor output through the low-pass filter is connected to the input of the first threshold device. The output of the first threshold device is connected to a decision circuit, the second input of which is connected to the output of the second threshold device. The PLL output is also connected to an amplifier, the output of which through a third nonlinear element is connected to a bandpass filter. The output of the bandpass filter through the detector is connected to the input of the second threshold device.
RU94042785A 1994-12-05 1994-12-05 Device for detection of signals with frequency-shift keying RU2115250C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94042785A RU2115250C1 (en) 1994-12-05 1994-12-05 Device for detection of signals with frequency-shift keying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94042785A RU2115250C1 (en) 1994-12-05 1994-12-05 Device for detection of signals with frequency-shift keying

Publications (2)

Publication Number Publication Date
RU94042785A true RU94042785A (en) 1996-10-20
RU2115250C1 RU2115250C1 (en) 1998-07-10

Family

ID=20162892

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94042785A RU2115250C1 (en) 1994-12-05 1994-12-05 Device for detection of signals with frequency-shift keying

Country Status (1)

Country Link
RU (1) RU2115250C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2589360C1 (en) * 2015-03-06 2016-07-10 Федеральный научно-производственный центр акционерное общество "Научно-производственное объединение "Марс" Method of receiving multiple frequency shift keyed digital signal

Also Published As

Publication number Publication date
RU2115250C1 (en) 1998-07-10

Similar Documents

Publication Publication Date Title
US7127224B2 (en) Baseband circuit incorporated in direct conversion receiver free from direct-current offset voltage without change of cut-off frequency
ES2023921B3 (en) DEVICE FOR REDUCING BACKGROUND NOISE IN AN ELECTROACOUSTIC CHAIN.
KR830008566A (en) Receiver for receiving carrier frequency or phase modulated AM signal
CA2000434A1 (en) Integrated compression amplifier having programmable threshold voltage
US4215280A (en) Phase responsive frequency detector
RU94042785A (en) Detector of signals with frequency telegraphy
US3493871A (en) Balanced limiter-detector circuit for radio receiver
JPS5923642A (en) Front end circuit for infrared ray receiver
KR840001996B1 (en) Expanders
KR870010751A (en) Video signal separator
US3365670A (en) Low noise heterodyne vlf receiver system
SU801268A2 (en) Amplitude-modulated signal receiver
SU1646069A1 (en) Discrete signal detector in frequency telegraphy
SU693542A1 (en) Frequency-modulated signal demodulator with frequency feedback
SU1538257A1 (en) Amplitude-modulated signal receiver
Lunn A Monolithic Wideband Synchronous Video Detector for Color TV
SU881977A1 (en) Amplifying device
SU698136A2 (en) Radio receiver
SU1538220A1 (en) Shift converter
KR900004472Y1 (en) Moise eleminating circuit for television audio auto-converter
CN116545391A (en) True logarithmic amplifier with self-adaptive temperature compensation
JPH01298817A (en) Tone squelch circuit
SU1145488A2 (en) Frequency-shift keyed signal demodulator
JPS62150905A (en) Fm demodulation circuit
JPH0214605A (en) Optical reception circuit

Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20091206