JPS55105440A - Semiconductor integrated circuit - Google Patents

Semiconductor integrated circuit

Info

Publication number
JPS55105440A
JPS55105440A JP1292179A JP1292179A JPS55105440A JP S55105440 A JPS55105440 A JP S55105440A JP 1292179 A JP1292179 A JP 1292179A JP 1292179 A JP1292179 A JP 1292179A JP S55105440 A JPS55105440 A JP S55105440A
Authority
JP
Japan
Prior art keywords
oscillation
terminal
circuit
frequency
transistor
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
JP1292179A
Other languages
Japanese (ja)
Other versions
JPS6016132B2 (en
Inventor
Satotoshi Goto
Takehiko Umeyama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP54012921A priority Critical patent/JPS6016132B2/en
Publication of JPS55105440A publication Critical patent/JPS55105440A/en
Publication of JPS6016132B2 publication Critical patent/JPS6016132B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
    • H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
    • H04H40/81—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for stereo-monaural switching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L3/00—Starting of generators

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To double both the frequency observation and the oscillation control via one external terminal by providing an external terminal for frequency observation and oscillation control to the oscillation control circuit and thus giving the control to both the oscillation and its discontinuation, thus increasing the using efficiency of the external terminal. CONSTITUTION:Divider circuit 2 consists of two divider circuits 201 and 200 featuring the division ratio of 1/2, and the frequency of 1/4 oscillation frequency of oscillation circuit 1 is observed at terminal 5. For oscillation control circuit 3, the base of transistor 304 becomes lower than the reference voltage of terminal 4 when the terminal is earthed, and thus transistor 304 is turned on. Accordingly, transistor 306 is also turned on, and diode 101 is short-circuited equivalently to stop the operation of circuit 1. In case terminal 5 is released, circuit 1 performs the oscillation. Under these conditions, the voltage always emerges up and down at terminal 5 via the oscillation output, thus securing observation of the oscillation frequency.
JP54012921A 1979-02-06 1979-02-06 semiconductor integrated circuit Expired JPS6016132B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54012921A JPS6016132B2 (en) 1979-02-06 1979-02-06 semiconductor integrated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54012921A JPS6016132B2 (en) 1979-02-06 1979-02-06 semiconductor integrated circuit

Publications (2)

Publication Number Publication Date
JPS55105440A true JPS55105440A (en) 1980-08-13
JPS6016132B2 JPS6016132B2 (en) 1985-04-24

Family

ID=11818789

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54012921A Expired JPS6016132B2 (en) 1979-02-06 1979-02-06 semiconductor integrated circuit

Country Status (1)

Country Link
JP (1) JPS6016132B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257634U (en) * 1988-10-19 1990-04-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257634U (en) * 1988-10-19 1990-04-25

Also Published As

Publication number Publication date
JPS6016132B2 (en) 1985-04-24

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