JPS5794910A - Recording level display device - Google Patents

Recording level display device

Info

Publication number
JPS5794910A
JPS5794910A JP17062580A JP17062580A JPS5794910A JP S5794910 A JPS5794910 A JP S5794910A JP 17062580 A JP17062580 A JP 17062580A JP 17062580 A JP17062580 A JP 17062580A JP S5794910 A JPS5794910 A JP S5794910A
Authority
JP
Japan
Prior art keywords
output
amplifier
diode
resistance
amplified
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
JP17062580A
Other languages
Japanese (ja)
Inventor
Nobuyuki Suzuki
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP17062580A priority Critical patent/JPS5794910A/en
Publication of JPS5794910A publication Critical patent/JPS5794910A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing

Landscapes

  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

PURPOSE:To display a recording level adequately by providing a color changing diode which changes in color successively in accordance with the input level of a recorded signal. CONSTITUTION:A recorded signal from a microphone 11 is amplified by an amplifier 12 which has a level regulator 13. The amplification output is passed through a diode 17, a resistance 18 and a capacitor 19 for peak detection when a switch 20 is on or mean-value detection when off. The detection output is amplified by a buffer amplifier 21, whose output is supplied to an operational amplifier 24 for inverse amplification based upon the reference voltage of a constant voltage circuit 28. The resulting inversion output is applied through a resistance 30 to the terminal 2 of a light emission diode 29, which emits green light. The output of the operational amplifier 24 is further amplified by an inverting amplifier 27 on the basis of the voltage of the constant voltage circuit 28 and its output is applied through a resistance 31 to the terminal 1 of the light emission diode 29, which emits red light.
JP17062580A 1980-12-02 1980-12-02 Recording level display device Pending JPS5794910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17062580A JPS5794910A (en) 1980-12-02 1980-12-02 Recording level display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17062580A JPS5794910A (en) 1980-12-02 1980-12-02 Recording level display device

Publications (1)

Publication Number Publication Date
JPS5794910A true JPS5794910A (en) 1982-06-12

Family

ID=15908338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17062580A Pending JPS5794910A (en) 1980-12-02 1980-12-02 Recording level display device

Country Status (1)

Country Link
JP (1) JPS5794910A (en)

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