JPS5550165A - Spectrum display device - Google Patents
Spectrum display deviceInfo
- Publication number
- JPS5550165A JPS5550165A JP12430078A JP12430078A JPS5550165A JP S5550165 A JPS5550165 A JP S5550165A JP 12430078 A JP12430078 A JP 12430078A JP 12430078 A JP12430078 A JP 12430078A JP S5550165 A JPS5550165 A JP S5550165A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- closed
- switch
- input signal
- indicate
- 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
Links
- 238000001228 spectrum Methods 0.000 title abstract 3
- 239000003990 capacitor Substances 0.000 abstract 3
- 238000009499 grossing Methods 0.000 abstract 2
Abstract
PURPOSE: To selectively indicate each of a real time, holding and a maximum value on a display panel, by optionally opening and closing two switch circuits in combination.
CONSTITUTION: To indicate the real time of spectrum of an input signal from a terminal 1, a switch SW1 is closed. As a result, a switch circuit 2 is closed and the input signal is applied to a rectification smoothing circuit 4 through a filter circuit 3. At that thime, the potential on a control terminal 12 of a switch circuit in the rectification smoothing circuit 4 is set at an H-level by the closing of the switch SW1, a capacitor of the circuit 4 is charged or discharged depending on the input signal and the spectrum of the input signal is indicated on a display panel 8 through a multiplexer 5. To indicate holding, a siwtch SW2 is closed. At that time, the circuit 2 is opened or closed and the potential on the control terminal 12 of the circuit 4 is set at an L-level. As a result, an input signal is held on the capacitor of the circuit 4 and indicated on the display panel 8. To indicate a maximum value, a switch SW3 is closed. As a result, the circuit 2 is closed, the potential on the terminal 12 is set at the L-level and the maximum value of a signal is held on the capacitor of the circuit 4.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12430078A JPS5853866B2 (en) | 1978-10-09 | 1978-10-09 | spectrum display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12430078A JPS5853866B2 (en) | 1978-10-09 | 1978-10-09 | spectrum display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5550165A true JPS5550165A (en) | 1980-04-11 |
| JPS5853866B2 JPS5853866B2 (en) | 1983-12-01 |
Family
ID=14881916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12430078A Expired JPS5853866B2 (en) | 1978-10-09 | 1978-10-09 | spectrum display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5853866B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872412U (en) * | 1981-11-11 | 1983-05-17 | 本田技研工業株式会社 | internal combustion engine silencer |
| JPS6010180A (en) * | 1983-06-30 | 1985-01-19 | Akai Electric Co Ltd | Frequency analysis display |
| JPH03113915U (en) * | 1990-03-08 | 1991-11-21 |
-
1978
- 1978-10-09 JP JP12430078A patent/JPS5853866B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872412U (en) * | 1981-11-11 | 1983-05-17 | 本田技研工業株式会社 | internal combustion engine silencer |
| JPS6010180A (en) * | 1983-06-30 | 1985-01-19 | Akai Electric Co Ltd | Frequency analysis display |
| JPH03113915U (en) * | 1990-03-08 | 1991-11-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5853866B2 (en) | 1983-12-01 |
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