JPS5614757A - Frequency modulation system - Google Patents

Frequency modulation system

Info

Publication number
JPS5614757A
JPS5614757A JP8984579A JP8984579A JPS5614757A JP S5614757 A JPS5614757 A JP S5614757A JP 8984579 A JP8984579 A JP 8984579A JP 8984579 A JP8984579 A JP 8984579A JP S5614757 A JPS5614757 A JP S5614757A
Authority
JP
Japan
Prior art keywords
frequency
division
dividing circuit
circuit
output
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
JP8984579A
Other languages
Japanese (ja)
Inventor
Yuji Takada
Masaru Watanabe
Yuichi Miwa
Tetsuo Nojima
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP8984579A priority Critical patent/JPS5614757A/en
Publication of JPS5614757A publication Critical patent/JPS5614757A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/12—Modulator circuits; Transmitter circuits
    • H04L27/122—Modulator circuits; Transmitter circuits using digital generation of carrier signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To facilitate the LSI-implementation of circuits by digitally performing the processing of all circuits while generating many kinds of frequencies, by varying the output frequency-division value of a frequency-division-ratio varying circuit provided to a frequency-dividing circuit in accordance with input data. CONSTITUTION:A high-frequency clock signal generated by high-frequency oscillator 11 is applied to frequency-dividing circuit 12 which uses a presettable counter whose frequency-division ratio can adequately be set. Division-ratio varying circuit 13 is applied with input data 1 and 0 and further supplied with a signal for control over the frequency-division ratio of frequency-dividing circuit 12 by changing modes such as kinds of apparatuses. The output of frequency-dividing circuit 12 is counted by counter 14, whose count value is converted by D/A converter 15 into an analog signal, which is passed through filter 16 to output a signal of a fixed frequency. In accordance with input data, the output frequency-division value of frequency- division-ratio varying circuit 13 connected to frequency-dividing circuit 12 is varied to generate many kinds of frequencies by frequency-dividing circuit 12 and the whole of processing is digitized to facilitate the LSI-implementation of the circuit.
JP8984579A 1979-07-17 1979-07-17 Frequency modulation system Pending JPS5614757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8984579A JPS5614757A (en) 1979-07-17 1979-07-17 Frequency modulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8984579A JPS5614757A (en) 1979-07-17 1979-07-17 Frequency modulation system

Publications (1)

Publication Number Publication Date
JPS5614757A true JPS5614757A (en) 1981-02-13

Family

ID=13982095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8984579A Pending JPS5614757A (en) 1979-07-17 1979-07-17 Frequency modulation system

Country Status (1)

Country Link
JP (1) JPS5614757A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6076596A (en) * 1996-03-14 2000-06-20 Denso Corporation Cooling apparatus for high-temperature medium by boiling and condensing refrigerant
US6357517B1 (en) 1994-07-04 2002-03-19 Denso Corporation Cooling apparatus boiling and condensing refrigerant
US6527045B1 (en) 1996-03-14 2003-03-04 Denso Corporation Cooling apparatus boiling and condensing refrigerant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6357517B1 (en) 1994-07-04 2002-03-19 Denso Corporation Cooling apparatus boiling and condensing refrigerant
US6076596A (en) * 1996-03-14 2000-06-20 Denso Corporation Cooling apparatus for high-temperature medium by boiling and condensing refrigerant
US6527045B1 (en) 1996-03-14 2003-03-04 Denso Corporation Cooling apparatus boiling and condensing refrigerant
US7004239B2 (en) 1996-03-14 2006-02-28 Denso Corporation Cooling apparatus boiling and condensing refrigerant

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