ES2095220T3 - Circuito de filtro activo. - Google Patents
Circuito de filtro activo.Info
- Publication number
- ES2095220T3 ES2095220T3 ES90107578T ES90107578T ES2095220T3 ES 2095220 T3 ES2095220 T3 ES 2095220T3 ES 90107578 T ES90107578 T ES 90107578T ES 90107578 T ES90107578 T ES 90107578T ES 2095220 T3 ES2095220 T3 ES 2095220T3
- Authority
- ES
- Spain
- Prior art keywords
- filter
- differential
- transistor
- differential pairs
- active filter
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
- H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
- H03H11/1213—Frequency selective two-port networks using amplifiers with feedback using transistor amplifiers
Landscapes
- Networks Using Active Elements (AREA)
Abstract
UN CIRCUITO DE FILTRO ACTIVO INCLUYE UN PRIMER Y SEGUNDO PARES DIFERENCIALES, QUE CADA UNO DE ELLOS TIENE UN PAR DE TRANSISTORES. HAY CONECTADO UN CONDENSADOR A UN COLECTOR DE CADA UNO DE ELLOS SOBRE EL TRANSISTOR DEL PRIMER Y SEGUNDO PARES DIFERENCIALES. UNA PRIMERA Y SEGUNDA RUTA DE RETROALIMENTACION NEGATIVA ESTAN CONECTADAS, RESPECTIVAMENTE, ENTRE EL COLECTOR Y UNA BASE DE UN TRANSISTOR DEL PRIMER PAR DIFERENCIAL Y ENTRE EL COLECTOR DE UN TRANSISTOR DEL SEGUNDO PAR DIFERENCIAL Y UNA BASE DEL OTRO TRANSISTOR DEL PRIMER PAR DIFERENCIAL. AL APLICAR VOLTAJES APROPIADOS A LA ENTRADAS RESPECTIVAS DE LOS PARES DIFERENCIALES, EL CIRCUITO DE FILTRO ACTIVO FUNCIONA COMO UN FILTRO DE PASO DE BANDA, FILTRO DE PASO BAJO, FILTRO DE PASO ALTO, FILTRO DE ELIMINACION DE BANDA O FILTRO DE DESPLAZAMIENTO DE FASE CON LA MISMA CONFIGURACION DE CIRCUITO. UN CIRCUITO DE DUPLICACION SIMULTANEA ACTUAL CAMBIA CORRELATIVAMENTE LAS CANTIDADES DE CORRIENTE DEL PRIMER Y SEGUNDO PARES DIFERENCIALES COMO RESPUESTA A UN VOLTAJE DE CONTROL, POR EL QUE SE PUEDE CAMBIAR UNA CARACTERISTICA DE FILTRO.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1100767A JPH0744383B2 (ja) | 1989-04-20 | 1989-04-20 | 発振回路 |
JP25257889 | 1989-09-28 | ||
JP25257989 | 1989-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2095220T3 true ES2095220T3 (es) | 1997-02-16 |
Family
ID=27309299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES90107578T Expired - Lifetime ES2095220T3 (es) | 1989-04-20 | 1990-04-20 | Circuito de filtro activo. |
Country Status (6)
Country | Link |
---|---|
US (1) | US5317216A (es) |
EP (1) | EP0393717B1 (es) |
KR (1) | KR0177149B1 (es) |
CA (1) | CA2014968C (es) |
DE (1) | DE69028869T2 (es) |
ES (1) | ES2095220T3 (es) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3938760A1 (de) * | 1989-11-23 | 1991-05-29 | Telefunken Electronic Gmbh | Abstimmbarer resonanzverstaerker oder oszillator |
KR960016441B1 (ko) * | 1993-01-28 | 1996-12-11 | 삼성전자 주식회사 | 알지비(rgb) 인코더 |
KR100312623B1 (ko) * | 1993-02-26 | 2001-12-28 | 이데이 노부유끼 | 액티브필터회로장치 |
JP3318725B2 (ja) * | 1994-01-12 | 2002-08-26 | 株式会社日立製作所 | アナログフィルタ回路 |
FR2716052B1 (fr) * | 1994-02-09 | 1996-03-29 | Alcatel Mobile Comm France | Dispositif d'ajustement d'une fréquence de coupure d'un filtre, et filtre comportant un tel dispositif. |
US6201417B1 (en) * | 1994-09-02 | 2001-03-13 | Semiconductor Components Industries, Llc. | Shaping a current sense signal by using a controlled slew rate |
US5635863A (en) * | 1995-05-25 | 1997-06-03 | Vtc, Inc. | Programmable phase comparator |
US6072360A (en) * | 1997-11-24 | 2000-06-06 | Mccullough; Rob | Analog sampling filters |
CA2224261A1 (en) * | 1997-12-09 | 1999-06-09 | Philsar Electronics Inc. | Low phase noise, high q, high gain amplifier in an integrated circuit |
US6525609B1 (en) | 1998-11-12 | 2003-02-25 | Broadcom Corporation | Large gain range, high linearity, low noise MOS VGA |
US6985035B1 (en) | 1998-11-12 | 2006-01-10 | Broadcom Corporation | System and method for linearizing a CMOS differential pair |
US6591091B1 (en) | 1998-11-12 | 2003-07-08 | Broadcom Corporation | System and method for coarse/fine PLL adjustment |
US7276970B2 (en) | 1998-11-12 | 2007-10-02 | Broadcom Corporation | System and method for linearizing a CMOS differential pair |
US6445039B1 (en) | 1998-11-12 | 2002-09-03 | Broadcom Corporation | System and method for ESD Protection |
US6885275B1 (en) | 1998-11-12 | 2005-04-26 | Broadcom Corporation | Multi-track integrated spiral inductor |
US6696898B1 (en) | 1998-11-12 | 2004-02-24 | Broadcom Corporation | Differential crystal oscillator |
EP1145318B1 (en) | 1999-01-15 | 2015-12-30 | Broadcom Corporation | System and method for esd protection |
US8405152B2 (en) | 1999-01-15 | 2013-03-26 | Broadcom Corporation | System and method for ESD protection |
US7687858B2 (en) | 1999-01-15 | 2010-03-30 | Broadcom Corporation | System and method for ESD protection |
WO2000072446A1 (en) | 1999-05-26 | 2000-11-30 | Broadcom Corporation | Integrated vco |
US7696823B2 (en) | 1999-05-26 | 2010-04-13 | Broadcom Corporation | System and method for linearizing a CMOS differential pair |
JP2003319288A (ja) * | 2002-04-22 | 2003-11-07 | Sharp Corp | 音声復調回路 |
US7439592B2 (en) | 2004-12-13 | 2008-10-21 | Broadcom Corporation | ESD protection for high voltage applications |
US7505238B2 (en) | 2005-01-07 | 2009-03-17 | Agnes Neves Woo | ESD configuration for low parasitic capacitance I/O |
JP2007181008A (ja) * | 2005-12-28 | 2007-07-12 | Sanyo Electric Co Ltd | 能動フィルタ回路 |
US8698554B2 (en) * | 2011-12-15 | 2014-04-15 | Lsi Corporation | Second order active high-pass filter with cross-coupled feedback for Q enhancement |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3969682A (en) * | 1974-10-21 | 1976-07-13 | Oberheim Electronics Inc. | Circuit for dynamic control of phase shift |
WO1980002347A1 (en) * | 1979-04-25 | 1980-10-30 | Fujitsu Ltd | Offset compensating circuit |
US4839542A (en) * | 1984-08-21 | 1989-06-13 | General Datacomm Industries, Inc. | Active transconductance filter device |
JPH0787332B2 (ja) * | 1986-07-18 | 1995-09-20 | 株式会社東芝 | フイルタ回路の時定数自動調整回路 |
JPS6335006A (ja) * | 1986-07-30 | 1988-02-15 | Toshiba Corp | 自動調整フイルタ |
JPH07120923B2 (ja) * | 1986-12-27 | 1995-12-20 | ソニー株式会社 | フイルタ調整装置 |
AU602031B2 (en) * | 1986-12-29 | 1990-09-27 | Sony Corporation | Filter circuit |
JP2519703B2 (ja) * | 1987-02-04 | 1996-07-31 | 株式会社東芝 | 発振回路 |
JP2542634B2 (ja) * | 1987-09-08 | 1996-10-09 | 株式会社東芝 | アクティブフィルタ型信号調整回路 |
US5023491A (en) * | 1988-01-18 | 1991-06-11 | Nec Corporation | Filter circuit arrangements with automatic adjustment of cut-off frequencies |
US4829268A (en) * | 1988-05-12 | 1989-05-09 | Hughes Aircraft Company | Loop filter for frequency multiplying phase locked loop |
US4968901A (en) * | 1989-05-16 | 1990-11-06 | Burr-Brown Corporation | Integrated circuit high frequency input attenuator circuit |
-
1990
- 1990-04-19 KR KR1019900005660A patent/KR0177149B1/ko not_active IP Right Cessation
- 1990-04-19 US US07/515,021 patent/US5317216A/en not_active Expired - Lifetime
- 1990-04-19 CA CA002014968A patent/CA2014968C/en not_active Expired - Lifetime
- 1990-04-20 DE DE69028869T patent/DE69028869T2/de not_active Expired - Fee Related
- 1990-04-20 EP EP90107578A patent/EP0393717B1/en not_active Expired - Lifetime
- 1990-04-20 ES ES90107578T patent/ES2095220T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0393717A3 (en) | 1991-06-19 |
CA2014968A1 (en) | 1990-10-20 |
KR900017281A (ko) | 1990-11-15 |
EP0393717A2 (en) | 1990-10-24 |
DE69028869T2 (de) | 1997-05-28 |
EP0393717B1 (en) | 1996-10-16 |
DE69028869D1 (de) | 1996-11-21 |
US5317216A (en) | 1994-05-31 |
CA2014968C (en) | 1999-12-14 |
KR0177149B1 (ko) | 1999-04-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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