DE3202501C2 - - Google Patents
Info
- Publication number
- DE3202501C2 DE3202501C2 DE3202501A DE3202501A DE3202501C2 DE 3202501 C2 DE3202501 C2 DE 3202501C2 DE 3202501 A DE3202501 A DE 3202501A DE 3202501 A DE3202501 A DE 3202501A DE 3202501 C2 DE3202501 C2 DE 3202501C2
- Authority
- DE
- Germany
- Prior art keywords
- transistor
- current
- circuit
- volume control
- coupled
- 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.)
- Expired
Links
- 230000000295 complement effect Effects 0.000 claims description 2
- 230000005236 sound signal Effects 0.000 description 24
- 230000003321 amplification Effects 0.000 description 8
- 238000003199 nucleic acid amplification method Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000845077 Iare Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
- H03G3/24—Control dependent upon ambient noise level or sound level
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier
- H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier in emitter-coupled or cascode amplifiers
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56012076A JPS57125509A (en) | 1981-01-28 | 1981-01-28 | Signal level control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3202501A1 DE3202501A1 (de) | 1982-08-12 |
| DE3202501C2 true DE3202501C2 (US20100223739A1-20100909-C00025.png) | 1988-01-28 |
Family
ID=11795489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19823202501 Granted DE3202501A1 (de) | 1981-01-28 | 1982-01-27 | Lautstaerkeregelschaltung |
Country Status (5)
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4634995A (en) * | 1982-01-28 | 1987-01-06 | Hitachi, Ltd. | Electronic circuitry utilizing an inerted Darlington amplifier output stage to be operable with a low supply voltage |
| FI87860C (fi) * | 1988-04-05 | 1993-02-25 | Nokia Mobira Oy | Differentialutgaongens koppling som enpolig |
| US5724519A (en) * | 1989-02-17 | 1998-03-03 | Hitachi, Ltd. | Complementary transistor circuit and amplifier and CRT display device using the same |
| JPH06338934A (ja) * | 1993-05-25 | 1994-12-06 | Exar Corp | 事象駆動型制御回路を有するスピーカーホーン |
| US5319704A (en) * | 1993-06-17 | 1994-06-07 | Exar Corporation | Control circuit for voltage controlled attenuator for speakerphones |
| US5539831A (en) * | 1993-08-16 | 1996-07-23 | The University Of Mississippi | Active noise control stethoscope |
| US5896063A (en) * | 1997-04-30 | 1999-04-20 | Maxim Integrated Products, Inc. | Variable gain amplifier with improved linearity and bandwidth |
| US7071858B2 (en) * | 2004-10-29 | 2006-07-04 | Broadcom Corporation | Method and system for a glitch-free differential current steering switch circuit for high speed, high resolution digital-to-analog conversion |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3857047A (en) * | 1973-06-08 | 1974-12-24 | Rca Corp | Detector employing a current mirror |
| DE2526310A1 (de) * | 1975-06-12 | 1976-12-23 | Philips Patentverwaltung | Schaltung zur elektronischen verstaerkungseinstellung |
| US4065725A (en) * | 1976-08-16 | 1977-12-27 | Motorola, Inc. | Gain control circuit |
| JPS5396749A (en) * | 1977-02-04 | 1978-08-24 | Torio Kk | Current mirror circuit differential amplifier |
| JPS5472941A (en) * | 1977-11-24 | 1979-06-11 | Toko Inc | Transistor amplifier |
| NL7802973A (nl) * | 1978-03-20 | 1979-09-24 | Philips Nv | Versterkerschakeling met regelbare versterkings- factor. |
| JPS5547714A (en) * | 1978-09-30 | 1980-04-04 | Toshiba Corp | Variable gain amplifying circuit |
| US4331929A (en) * | 1979-04-04 | 1982-05-25 | Nippon Gakki Seizo Kabushiki Kaisha | Gain-controlled amplifier |
| JPS5718109A (en) * | 1980-07-08 | 1982-01-29 | Toshiba Corp | Sound volume controlling circuit |
-
1981
- 1981-01-28 JP JP56012076A patent/JPS57125509A/ja active Granted
-
1982
- 1982-01-19 GB GB8201399A patent/GB2091962B/en not_active Expired
- 1982-01-21 US US06/341,340 patent/US4494075A/en not_active Expired - Lifetime
- 1982-01-27 DE DE19823202501 patent/DE3202501A1/de active Granted
- 1982-01-28 KR KR8200347A patent/KR860000440B1/ko active
Also Published As
| Publication number | Publication date |
|---|---|
| US4494075A (en) | 1985-01-15 |
| GB2091962A (en) | 1982-08-04 |
| JPS57125509A (en) | 1982-08-04 |
| GB2091962B (en) | 1984-09-05 |
| DE3202501A1 (de) | 1982-08-12 |
| JPS6341446B2 (US20100223739A1-20100909-C00025.png) | 1988-08-17 |
| KR830009689A (ko) | 1983-12-22 |
| KR860000440B1 (ko) | 1986-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8127 | New person/name/address of the applicant |
Owner name: KABUSHIKI KAISHA TOSHIBA, KAWASAKI, KANAGAWA, JP |
|
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8328 | Change in the person/name/address of the agent |
Free format text: BLUMBACH, KRAMER & PARTNER, 81245 MUENCHEN |
|
| 8339 | Ceased/non-payment of the annual fee |