JPS572200A - Sound image control circuit - Google Patents
Sound image control circuitInfo
- Publication number
- JPS572200A JPS572200A JP7600380A JP7600380A JPS572200A JP S572200 A JPS572200 A JP S572200A JP 7600380 A JP7600380 A JP 7600380A JP 7600380 A JP7600380 A JP 7600380A JP S572200 A JPS572200 A JP S572200A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- sound image
- delta2
- collectors
- transistors
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
Abstract
PURPOSE:To realize a variation of stereophonic feeling or spread for a sound image to be reproduced, by adding the signal of the opposite channel to the signal of each channel of a stereo set and at the same time varying the level of the signal to be added. CONSTITUTION:When stereo signals -L and -R are obtained at terminals 1L and 1R of a stereo demodulating circuit 1, these signals are supplied to the base of transistors (TR) Q1 and Q2, respectively. Thus L+DELTA1R and R+DELTA1L are obtained at the collectors of the transistors. At the same time, signals -L and -R are supplied to the base of TRSQ3 and Q4, respectively, and also L-R and R-L are obtained at the collectors of these transistors since they constitute a differential amplifier. Then TRSQ5 and Q7 as well as Q6 and Q8 use the TRSQ3 and Q4 for a constant current source, respectively. Thus signals DELTA2(L-R) and DELTA2(R-L) are obtained at the collectors of TRSQ5 and Q8, and the coefficient DELTA2 varies by the value of voltage EC. As a result, the addition signals of opposite channels are obtained through speakers 4L and 4R, and the spread of a reproduced sound image can be varied by changing the value of voltage EC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7600380A JPS572200A (en) | 1980-06-05 | 1980-06-05 | Sound image control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7600380A JPS572200A (en) | 1980-06-05 | 1980-06-05 | Sound image control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS572200A true JPS572200A (en) | 1982-01-07 |
Family
ID=13592621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7600380A Pending JPS572200A (en) | 1980-06-05 | 1980-06-05 | Sound image control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS572200A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59163540U (en) * | 1983-04-20 | 1984-11-01 | ナイルス部品株式会社 | Automotive electronic meter display lighting control device |
| JPS6256583A (en) * | 1985-09-05 | 1987-03-12 | Matsushita Electric Works Ltd | Copper foil and laminated plate using it |
| JPH03129794A (en) * | 1989-10-14 | 1991-06-03 | Matsushita Electric Works Ltd | Treating method for circuit board substrate |
-
1980
- 1980-06-05 JP JP7600380A patent/JPS572200A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59163540U (en) * | 1983-04-20 | 1984-11-01 | ナイルス部品株式会社 | Automotive electronic meter display lighting control device |
| JPS6256583A (en) * | 1985-09-05 | 1987-03-12 | Matsushita Electric Works Ltd | Copper foil and laminated plate using it |
| JPH047901B2 (en) * | 1985-09-05 | 1992-02-13 | Matsushita Electric Works Ltd | |
| JPH03129794A (en) * | 1989-10-14 | 1991-06-03 | Matsushita Electric Works Ltd | Treating method for circuit board substrate |
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