WO2001024363A3 - An integrated circuit having a filter with charge balancing scheme to reduce transient disturbances - Google Patents

An integrated circuit having a filter with charge balancing scheme to reduce transient disturbances Download PDF

Info

Publication number
WO2001024363A3
WO2001024363A3 PCT/EP2000/009222 EP0009222W WO0124363A3 WO 2001024363 A3 WO2001024363 A3 WO 2001024363A3 EP 0009222 W EP0009222 W EP 0009222W WO 0124363 A3 WO0124363 A3 WO 0124363A3
Authority
WO
WIPO (PCT)
Prior art keywords
filter
circuit
noise
integrated circuit
charge balancing
Prior art date
Application number
PCT/EP2000/009222
Other languages
French (fr)
Other versions
WO2001024363A2 (en
Inventor
Sanjay M Bhandari
Original Assignee
Koninkl Philips Electronics Nv
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
Priority claimed from US09/407,776 external-priority patent/US6404578B1/en
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Priority to KR1020017006556A priority Critical patent/KR20010080576A/en
Priority to JP2001527435A priority patent/JP2003510940A/en
Priority to EP00967724A priority patent/EP1145428A3/en
Publication of WO2001024363A2 publication Critical patent/WO2001024363A2/en
Publication of WO2001024363A3 publication Critical patent/WO2001024363A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—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
    • H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • 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
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45098—PI types
    • 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
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45928—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit
    • H03F3/45932—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by using feedback means
    • H03F3/45937—Measuring at the loading circuit of the differential amplifier
    • H03F3/45941—Controlling the input circuit of the differential 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
    • H03H11/1291—Current or voltage controlled filters
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
    • 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
    • H03F2203/45466—Indexing scheme relating to differential amplifiers the CSC being controlled, e.g. by a signal derived from a non specified place in the dif amp circuit
    • 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
    • H03F2203/45506—Indexing scheme relating to differential amplifiers the CSC comprising only one switch
    • 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
    • H03F2203/45631—Indexing scheme relating to differential amplifiers the LC comprising one or more capacitors, e.g. coupling capacitors
    • 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
    • H03F2203/45634—Indexing scheme relating to differential amplifiers the LC comprising one or more switched capacitors
    • 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
    • H03F2203/45646—Indexing scheme relating to differential amplifiers the LC comprising an extra current source
    • 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
    • H03F2203/45702—Indexing scheme relating to differential amplifiers the LC comprising two resistors
    • 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
    • H03F2203/45726—Indexing scheme relating to differential amplifiers the LC comprising more than one switch, which are not cross coupled

Abstract

An integrated circuit includes a filter with switched capacitors to dynamically adjust a corner frequency of the filter. Such dynamically adjustable filters are typically included in circuits to reduce noise, and consequently such filters should not themselves generate noise. An equalization circuit is included in the filter to equalize the potential on each terminal of the switched capacitors prior to being switched into circuit, thereby removing a source of transient current. Another source of noise is a transient current induced by the application of control signals to the transistors used to switch the capacitors into circuit. A compensation circuit is included which generates a compensation current of opposite sense and substantially the same magnitude as the induced transient currents, to thereby effectively cancel noise at the filter output.
PCT/EP2000/009222 1999-09-28 2000-09-21 An integrated circuit having a filter with charge balancing scheme to reduce transient disturbances WO2001024363A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020017006556A KR20010080576A (en) 1999-09-28 2000-09-21 An integrated circuit having a filter with charge balancing scheme to reduce transient disturbances
JP2001527435A JP2003510940A (en) 1999-09-28 2000-09-21 Integrated circuit with charge-balancing filter to reduce transient disturbances
EP00967724A EP1145428A3 (en) 1999-09-28 2000-09-21 An integrated circuit having a filter with charge balancing scheme to reduce transient disturbances

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/407,776 US6404578B1 (en) 1999-09-28 1999-09-28 Circuit for reduction and optimization of write-to-read settling times in magnetic medium storage devices
US09/407,776 1999-09-28
US09/469,873 US6400217B1 (en) 1999-09-28 1999-12-22 Integrated circuit having a filter with charge balancing scheme to reduce transient disturbances
US09/469,873 1999-12-22

Publications (2)

Publication Number Publication Date
WO2001024363A2 WO2001024363A2 (en) 2001-04-05
WO2001024363A3 true WO2001024363A3 (en) 2001-10-18

Family

ID=27020006

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/009222 WO2001024363A2 (en) 1999-09-28 2000-09-21 An integrated circuit having a filter with charge balancing scheme to reduce transient disturbances

Country Status (3)

Country Link
EP (1) EP1145428A3 (en)
JP (1) JP2003510940A (en)
WO (1) WO2001024363A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7266464B2 (en) * 2004-12-17 2007-09-04 Texaco Inc. Dynamic cut-off frequency varying filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733205A (en) * 1986-04-30 1988-03-22 U.S. Philips Corporation Electrical filter
EP0421423A2 (en) * 1989-10-06 1991-04-10 Hitachi, Ltd. Method of controlling filter time constant and filter circuit having the time constant control function based on the method
US5519265A (en) * 1993-05-24 1996-05-21 Latham, Ii; Paul W. Adaptive RC product control in an analog-signal-manipulating circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733205A (en) * 1986-04-30 1988-03-22 U.S. Philips Corporation Electrical filter
EP0421423A2 (en) * 1989-10-06 1991-04-10 Hitachi, Ltd. Method of controlling filter time constant and filter circuit having the time constant control function based on the method
US5519265A (en) * 1993-05-24 1996-05-21 Latham, Ii; Paul W. Adaptive RC product control in an analog-signal-manipulating circuit

Also Published As

Publication number Publication date
EP1145428A2 (en) 2001-10-17
WO2001024363A2 (en) 2001-04-05
JP2003510940A (en) 2003-03-18
EP1145428A3 (en) 2002-03-27

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