JPS56110319A - Control circuit of sound quality - Google Patents
Control circuit of sound qualityInfo
- Publication number
- JPS56110319A JPS56110319A JP1277780A JP1277780A JPS56110319A JP S56110319 A JPS56110319 A JP S56110319A JP 1277780 A JP1277780 A JP 1277780A JP 1277780 A JP1277780 A JP 1277780A JP S56110319 A JPS56110319 A JP S56110319A
- Authority
- JP
- Japan
- Prior art keywords
- source
- voltage
- control
- signal
- flat
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/02—Manually-operated control
- H03G5/04—Manually-operated control in untuned amplifiers
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
PURPOSE:To secure a sufficient range of control for sound qualtit, by adding the flat signals of half the positive and negative phase side of the frequency characteristics having a double value of the flat signal which functions as an voice signal. CONSTITUTION:The transistors (Q) Q17-Q20 form adouble balance differential amplifier. The amplitude is equal between the positive phase signal sorce SG1 and the negative phase source SG2, and the flat signal source SG3 has an amplitude half the SG1 and SG2. Then a control is given to the voltage that is applied to the base of Q17-Q20. Thus the outputs of the sources SG1 and SG2 can be applied in a vectorlike way to the output of the source SG3. A control is given to both the base voltage of Q17/Q18 and Q18/Q19 in a range from the voltage by which all currents flow to the collector of Q17 from the source SG1 to the voltage by which the 1/4 current flows from the source SG1. In such way, a wide range of control is secured for sound quality.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1277780A JPS56110319A (en) | 1980-02-04 | 1980-02-04 | Control circuit of sound quality |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1277780A JPS56110319A (en) | 1980-02-04 | 1980-02-04 | Control circuit of sound quality |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56110319A true JPS56110319A (en) | 1981-09-01 |
JPS6336565B2 JPS6336565B2 (en) | 1988-07-20 |
Family
ID=11814830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1277780A Granted JPS56110319A (en) | 1980-02-04 | 1980-02-04 | Control circuit of sound quality |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56110319A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5817479U (en) * | 1981-07-27 | 1983-02-03 | ミサワホ−ム株式会社 | opening frame |
-
1980
- 1980-02-04 JP JP1277780A patent/JPS56110319A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5817479U (en) * | 1981-07-27 | 1983-02-03 | ミサワホ−ム株式会社 | opening frame |
JPS6212782Y2 (en) * | 1981-07-27 | 1987-04-02 |
Also Published As
Publication number | Publication date |
---|---|
JPS6336565B2 (en) | 1988-07-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1458663A (en) | Microphone circuits | |
US4008641A (en) | Device for modulating a musical tone signal to produce a rotating sound effect | |
JPS56134807A (en) | Acoustic reproducing device | |
GB1459760A (en) | Balanced modulator circuits | |
GB1337452A (en) | Frequency multiplying cirucit | |
JPS56110319A (en) | Control circuit of sound quality | |
KR900006953A (en) | Magnetic regeneration device | |
JPS573498A (en) | Multiway speaker device | |
FR2269267A1 (en) | Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal | |
JPS5312320A (en) | Mfb circuit | |
JPS57202200A (en) | Car stereo equipment | |
KR870011579A (en) | VTI's automatic tracking device | |
JPS5220801A (en) | Automatic voice frequency elimination and control system | |
JPS5441102A (en) | Signal converting circuit | |
JPS5733890A (en) | Acoustic device | |
JPS567599A (en) | Stereo reproducing unit | |
FR2321811A1 (en) | Correction circuit for electroacoustic transducer - has two differential amplifiers across transducer feeding error signal back to signal amplifier | |
JPS5717297A (en) | Damping circuit of speaker by diode | |
SU474957A1 (en) | Electro-acoustic system with loudspeaker voice coil parameters compensation | |
GB966983A (en) | Improvements in or relating to stereophonic sound reproducing apparatus | |
JPS57175000A (en) | Stereophonic reproducing device | |
JPS6444613A (en) | Sound volume adjusting circuit | |
JPS57199396A (en) | Speaker input controlling circuit | |
JPS5445183A (en) | Speed signal former | |
JPS57141112A (en) | Noise eliminating device |