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WO2007019509A3 - Feedback network for high gain amplification with enhanced bandwidth and gain control - Google Patents

Feedback network for high gain amplification with enhanced bandwidth and gain control Download PDF

Info

Publication number
WO2007019509A3
WO2007019509A3 PCT/US2006/030899 US2006030899W WO2007019509A3 WO 2007019509 A3 WO2007019509 A3 WO 2007019509A3 US 2006030899 W US2006030899 W US 2006030899W WO 2007019509 A3 WO2007019509 A3 WO 2007019509A3
Authority
WO
WIPO (PCT)
Prior art keywords
amplifier
gain
feedback network
bandwidth
enhanced bandwidth
Prior art date
Application number
PCT/US2006/030899
Other languages
French (fr)
Other versions
WO2007019509A2 (en
Inventor
Robert D Washburn
Robert F Mcclanahan
Original Assignee
Thunder Creative Technologies
Robert D Washburn
Robert F Mcclanahan
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thunder Creative Technologies, Robert D Washburn, Robert F Mcclanahan filed Critical Thunder Creative Technologies
Publication of WO2007019509A2 publication Critical patent/WO2007019509A2/en
Publication of WO2007019509A3 publication Critical patent/WO2007019509A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H03F3/08—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light
    • H03F3/087—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light with IC amplifier blocks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/42—Modifications of amplifiers to extend the bandwidth
    • H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
    • H03F1/486—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with IC amplifier blocks
    • 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
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/36—Indexing scheme relating to amplifiers the amplifier comprising means for increasing the bandwidth
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45101—Control of the DC level being present
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45166—Only one input of the dif amp being used for an input signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45522—Indexing scheme relating to differential amplifiers the FBC comprising one or more potentiometers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45528—Indexing scheme relating to differential amplifiers the FBC comprising one or more passive resistors and being coupled between the LC and the IC

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Optical Communication System (AREA)

Abstract

The system is an amplifier feedback circuit that permits a significant increase in useable bandwidth with comparable gain compared to amplifiers of the present art incorporating conventional feedback circuit topologies. The increased bandwidth is accomplished by significantly increasing the frequency of the pole in the transfer characteristic that is formed by the feedback resistor and the parasitic amplifier input capacitance. Embodiments shown include application to a transimpedance amplifier such as used with photo detector diodes in fiber optic receiver circuits. A basic voltage input, voltage output, operational amplifier circuit embodiment is also shown. Means for controlling the gain of the amplifier with a variable resistor that may be implemented with a digital potentiometer is shown.
PCT/US2006/030899 2005-08-05 2006-08-07 Feedback network for high gain amplification with enhanced bandwidth and gain control WO2007019509A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US70608605P 2005-08-05 2005-08-05
US60/706,086 2005-08-05
US46296606A 2006-08-07 2006-08-07
US11/462,966 2006-08-07

Publications (2)

Publication Number Publication Date
WO2007019509A2 WO2007019509A2 (en) 2007-02-15
WO2007019509A3 true WO2007019509A3 (en) 2007-07-26

Family

ID=37728001

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/030899 WO2007019509A2 (en) 2005-08-05 2006-08-07 Feedback network for high gain amplification with enhanced bandwidth and gain control

Country Status (1)

Country Link
WO (1) WO2007019509A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7812589B2 (en) * 2008-08-28 2010-10-12 Qualitau, Inc. Modified current source (MCS) with seamless range switching
CN108270410B (en) * 2018-02-06 2020-05-19 华中科技大学 A programmable amplifier with multi-stage adjustable bandwidth and gain and its control method
US20240001369A1 (en) * 2020-11-17 2024-01-04 Nuclein, Llc Apparatus and methods for molecular diagnostics

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979670A (en) * 1973-08-17 1976-09-07 Western Electric Company, Inc. Apparatus for detecting and measuring peak-to-peak values in electrical signals
US4029976A (en) * 1976-04-23 1977-06-14 The United States Of America As Represented By The Secretary Of The Navy Amplifier for fiber optics application
US4470020A (en) * 1982-05-06 1984-09-04 Mohr Daniel R Virtual ground preamplifier for magnetic phono cartridge
US5973566A (en) * 1998-03-31 1999-10-26 Hewlett Packard Company Discrete step variable gain inverting amplifier with constant ratio between adjacent gains
US6140868A (en) * 1999-03-09 2000-10-31 Lucent Technologies, Inc. Master tuning circuit for adjusting a slave transistor to follow a master resistor
US20050264360A1 (en) * 2004-05-27 2005-12-01 Ma Fan Y Resistor and switch-minimized variable analog gain circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979670A (en) * 1973-08-17 1976-09-07 Western Electric Company, Inc. Apparatus for detecting and measuring peak-to-peak values in electrical signals
US4029976A (en) * 1976-04-23 1977-06-14 The United States Of America As Represented By The Secretary Of The Navy Amplifier for fiber optics application
US4470020A (en) * 1982-05-06 1984-09-04 Mohr Daniel R Virtual ground preamplifier for magnetic phono cartridge
US5973566A (en) * 1998-03-31 1999-10-26 Hewlett Packard Company Discrete step variable gain inverting amplifier with constant ratio between adjacent gains
US6140868A (en) * 1999-03-09 2000-10-31 Lucent Technologies, Inc. Master tuning circuit for adjusting a slave transistor to follow a master resistor
US20050264360A1 (en) * 2004-05-27 2005-12-01 Ma Fan Y Resistor and switch-minimized variable analog gain circuit

Also Published As

Publication number Publication date
WO2007019509A2 (en) 2007-02-15

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