JPS6453658A - Direct converting fsk receiver - Google Patents

Direct converting fsk receiver

Info

Publication number
JPS6453658A
JPS6453658A JP17448387A JP17448387A JPS6453658A JP S6453658 A JPS6453658 A JP S6453658A JP 17448387 A JP17448387 A JP 17448387A JP 17448387 A JP17448387 A JP 17448387A JP S6453658 A JPS6453658 A JP S6453658A
Authority
JP
Japan
Prior art keywords
frequency
frf
becomes
signal
component
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP17448387A
Other languages
Japanese (ja)
Inventor
Akiyuki Yoshisato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric Co Ltd
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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Priority to JP17448387A priority Critical patent/JPS6453658A/en
Publication of JPS6453658A publication Critical patent/JPS6453658A/en
Pending legal-status Critical Current

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Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To make sufficient a frequency converter, a base band amplifier, etc., with one system by dislocating the frequency of a local signal in upper and lower directions and extracting an upper side or lower side receiving frequency only with a filter. CONSTITUTION:The oscillation frequency of a local oscillator 20 is set higher than a central frequency (fRF) of a receiving signal by 1.875kHz. Presently, when the signal of the central frequency fRF is received and a receiving signal frequency becomes fRF+ f, the output frequency of a mixer 21 becomes 4.375kHz, as this result, the frequency component passes through a BPF22 and is detected by a detector 23. On the other hand, when the frequency of the receiving signal is fRF- f, the output frequency of the mixer 21 becomes 0.625kHz, and the frequency component does not pass through a filter 22. Consequently, the component supplied to the detector 23 becomes only the frequency component of fRF+ f and for the frequency converter, a base band amplifier, etc., one system is sufficient.
JP17448387A 1987-07-13 1987-07-13 Direct converting fsk receiver Pending JPS6453658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17448387A JPS6453658A (en) 1987-07-13 1987-07-13 Direct converting fsk receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17448387A JPS6453658A (en) 1987-07-13 1987-07-13 Direct converting fsk receiver

Publications (1)

Publication Number Publication Date
JPS6453658A true JPS6453658A (en) 1989-03-01

Family

ID=15979272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17448387A Pending JPS6453658A (en) 1987-07-13 1987-07-13 Direct converting fsk receiver

Country Status (1)

Country Link
JP (1) JPS6453658A (en)

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