JPS5794910A - Recording level display device - Google Patents
Recording level display deviceInfo
- 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
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.
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) |
-
1980
- 1980-12-02 JP JP17062580A patent/JPS5794910A/en active Pending
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