JPS56140718A - Digital synthesizer - Google Patents

Digital synthesizer

Info

Publication number
JPS56140718A
JPS56140718A JP4261080A JP4261080A JPS56140718A JP S56140718 A JPS56140718 A JP S56140718A JP 4261080 A JP4261080 A JP 4261080A JP 4261080 A JP4261080 A JP 4261080A JP S56140718 A JPS56140718 A JP S56140718A
Authority
JP
Japan
Prior art keywords
terminal
data
controller
inform
frequency data
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.)
Granted
Application number
JP4261080A
Other languages
Japanese (ja)
Other versions
JPS6128256B2 (en
Inventor
Toshifumi Sakata
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4261080A priority Critical patent/JPS56140718A/en
Publication of JPS56140718A publication Critical patent/JPS56140718A/en
Publication of JPS6128256B2 publication Critical patent/JPS6128256B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To ensure a highly efficient use of a controller without adding any special terminal, by using the terminal for setting the desired frequency in common to the terminal that receives the checking specified frequeucy data. CONSTITUTION:The controller 14 turns on the MUTE terminal to give a requirement of the frequency data to the external device 17. The device 17 sends the frequency data of 4 bits to the switch signal input terminals K1-K4 of the controller 14 and at the same time sends a high-level signal to the SD terminal to inform a transmission of the frequency data. The controller 14 takes the frequency data into a memory through the terminals K1-K4 and then turns off the MUTE terminal to inform a reception of the data. Then the device 17 sets the SD terminal at a low level to inform a completion of the data transmission.
JP4261080A 1980-04-01 1980-04-01 Digital synthesizer Granted JPS56140718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4261080A JPS56140718A (en) 1980-04-01 1980-04-01 Digital synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4261080A JPS56140718A (en) 1980-04-01 1980-04-01 Digital synthesizer

Publications (2)

Publication Number Publication Date
JPS56140718A true JPS56140718A (en) 1981-11-04
JPS6128256B2 JPS6128256B2 (en) 1986-06-30

Family

ID=12640791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4261080A Granted JPS56140718A (en) 1980-04-01 1980-04-01 Digital synthesizer

Country Status (1)

Country Link
JP (1) JPS56140718A (en)

Also Published As

Publication number Publication date
JPS6128256B2 (en) 1986-06-30

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