IT1041568B - Amplificatore operazionale a guadagno variabile - Google Patents
Amplificatore operazionale a guadagno variabileInfo
- Publication number
- IT1041568B IT1041568B IT69085/75A IT6908575A IT1041568B IT 1041568 B IT1041568 B IT 1041568B IT 69085/75 A IT69085/75 A IT 69085/75A IT 6908575 A IT6908575 A IT 6908575A IT 1041568 B IT1041568 B IT 1041568B
- Authority
- IT
- Italy
- Prior art keywords
- operational amplifier
- variable gain
- gain operational
- variable
- amplifier
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
- H04B1/64—Volume compression or expansion arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US497136A US3919654A (en) | 1974-08-14 | 1974-08-14 | Syllabic compandor |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1041568B true IT1041568B (it) | 1980-01-10 |
Family
ID=23975615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT69085/75A IT1041568B (it) | 1974-08-14 | 1975-08-13 | Amplificatore operazionale a guadagno variabile |
Country Status (10)
Country | Link |
---|---|
US (1) | US3919654A (it) |
JP (1) | JPS5831044B2 (it) |
BE (1) | BE832350A (it) |
CA (1) | CA1025364A (it) |
DE (1) | DE2535695C3 (it) |
FR (1) | FR2282189A1 (it) |
GB (1) | GB1513828A (it) |
IT (1) | IT1041568B (it) |
NL (1) | NL164715C (it) |
SE (1) | SE415135B (it) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4471324A (en) * | 1982-01-19 | 1984-09-11 | Dbx, Inc. | All NPN variably controlled amplifier |
JPS59140727A (ja) * | 1983-01-31 | 1984-08-13 | Fujitsu Ltd | 周波数変換方式 |
US4789799A (en) * | 1983-04-05 | 1988-12-06 | Tektronix, Inc. | Limiting circuit |
FR2618622B1 (fr) * | 1987-07-21 | 1994-05-20 | Thomson Semiconducteurs | Circuit compresseur de signal, en particulier pour appareil telephonique |
ATE120903T1 (de) * | 1988-10-13 | 1995-04-15 | Siemens Ag | Integrierter kompressionsverstärker mit programmierbarer schwellspannung. |
JPH0821819B2 (ja) * | 1990-08-30 | 1996-03-04 | 三洋電機株式会社 | 増幅回路 |
US5079517A (en) * | 1991-02-04 | 1992-01-07 | Motorola, Inc. | Circuit for DC control of a compressor |
US5148119A (en) * | 1991-03-22 | 1992-09-15 | Linear Technology Corporation | Precise reference voltage generator for feedforward compensated amplifiers |
US5117199A (en) * | 1991-03-27 | 1992-05-26 | International Business Machines Corporation | Fully differential follower using operational amplifier |
JP2661404B2 (ja) * | 1991-05-21 | 1997-10-08 | 日本電気株式会社 | 携帯電話装置 |
US5631968A (en) * | 1995-06-06 | 1997-05-20 | Analog Devices, Inc. | Signal conditioning circuit for compressing audio signals |
US5757230A (en) * | 1996-05-28 | 1998-05-26 | Analog Devices, Inc. | Variable gain CMOS amplifier |
US6441686B1 (en) * | 1999-06-04 | 2002-08-27 | Analog Devices, Inc. | Offset correction method and apparatus |
JP4076858B2 (ja) * | 2001-01-10 | 2008-04-16 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 全差動可変利得増幅器および多次元増幅器構成 |
US6614300B2 (en) * | 2001-08-27 | 2003-09-02 | Nokia Corporation | Dual current mirror power amplifier bias control |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2179414A (en) * | 1937-05-25 | 1939-11-07 | Philco Radio & Television Corp | Contrast amplifier |
US2576145A (en) * | 1945-12-06 | 1951-11-27 | Int Standard Electric Corp | Volume expansion system for audio and like amplifiers |
US2903522A (en) * | 1955-07-07 | 1959-09-08 | Gen Precision Lab Inc | Transistor amplifier |
FR1508391A (fr) * | 1966-11-25 | 1968-01-05 | Montages Electr Atel | Amplificateur à niveau de sortie stabilisé |
US3581223A (en) * | 1969-04-30 | 1971-05-25 | Hc Electronics Inc | Fast response dynamic gain control circuit |
US3550028A (en) * | 1969-07-28 | 1970-12-22 | Spectra Sonics | Compressor-limiter circuit |
US3676789A (en) * | 1970-11-16 | 1972-07-11 | Derek Bray | Low distortion agc amplifier |
US3727146A (en) * | 1971-12-20 | 1973-04-10 | Us Navy | Linear, voltage variable, temperature stable gain control |
-
1974
- 1974-08-14 US US497136A patent/US3919654A/en not_active Expired - Lifetime
-
1975
- 1975-06-11 CA CA229,073A patent/CA1025364A/en not_active Expired
- 1975-08-05 SE SE7508830A patent/SE415135B/xx not_active IP Right Cessation
- 1975-08-09 DE DE2535695A patent/DE2535695C3/de not_active Expired
- 1975-08-12 BE BE159131A patent/BE832350A/xx not_active IP Right Cessation
- 1975-08-12 GB GB33482/75A patent/GB1513828A/en not_active Expired
- 1975-08-13 FR FR7525262A patent/FR2282189A1/fr active Granted
- 1975-08-13 NL NL7509655.A patent/NL164715C/xx not_active IP Right Cessation
- 1975-08-13 IT IT69085/75A patent/IT1041568B/it active
- 1975-08-14 JP JP50098150A patent/JPS5831044B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA1025364A (en) | 1978-01-31 |
DE2535695A1 (de) | 1976-03-04 |
NL164715B (nl) | 1980-08-15 |
NL7509655A (nl) | 1976-02-17 |
GB1513828A (en) | 1978-06-14 |
FR2282189B1 (it) | 1977-12-16 |
FR2282189A1 (fr) | 1976-03-12 |
US3919654A (en) | 1975-11-11 |
JPS5831044B2 (ja) | 1983-07-04 |
SE7508830L (sv) | 1976-02-16 |
BE832350A (fr) | 1975-12-01 |
NL164715C (nl) | 1981-01-15 |
DE2535695C3 (de) | 1985-08-01 |
DE2535695B2 (de) | 1979-06-13 |
AU8387975A (en) | 1977-02-17 |
SE415135B (sv) | 1980-09-08 |
JPS5144858A (it) | 1976-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DK352475A (da) | Effektforsterker | |
NL7415986A (nl) | Versterker. | |
NL7512679A (nl) | Versterker. | |
IT1043589B (it) | Amplificatore | |
IT1041568B (it) | Amplificatore operazionale a guadagno variabile | |
FR2280245A1 (fr) | Amplificateur equilibre | |
IT1041910B (it) | Egualizzatore a tirardo variabile | |
IT1052736B (it) | Amplificatore a doppia reazione | |
IT1039692B (it) | Amplificatore | |
IT1017420B (it) | Amplificatore a retroazione | |
FR2277461A1 (fr) | Amplificateur a transistor | |
NL7409191A (nl) | Verschilversterker. | |
IT1032670B (it) | Amplificatore a transistori | |
IT1044102B (it) | Amplificatore di segnali a guadagno controllabile | |
FR2294586A1 (fr) | Amplificateur push-pull | |
SE403230B (sv) | Differensforsterkare | |
IT1014732B (it) | Amplificatore a guadagno variabile | |
NL7415470A (nl) | Versterkingsregeling. | |
FR2289780A1 (fr) | Amplificateur a commande hydraulique | |
BE780713A (fr) | Amplificateur a gain variable | |
FR2287806A1 (fr) | Amplificateur a seuil a gain reglable | |
IT1031571B (it) | Amplificatore laser | |
ATA1000674A (de) | Systemisch wirkende fungizide | |
SU529305A1 (ru) | Мембранный усилитель | |
RO67875A2 (ro) | Amplificator hidraulic |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19940824 |