WO2001047323A3 - Compander for power control in a ballast - Google Patents

Compander for power control in a ballast Download PDF

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Publication number
WO2001047323A3
WO2001047323A3 PCT/EP2000/012622 EP0012622W WO0147323A3 WO 2001047323 A3 WO2001047323 A3 WO 2001047323A3 EP 0012622 W EP0012622 W EP 0012622W WO 0147323 A3 WO0147323 A3 WO 0147323A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
power control
power
analog
dynamic
Prior art date
Application number
PCT/EP2000/012622
Other languages
French (fr)
Other versions
WO2001047323A2 (en
Inventor
Benoit R Veillette
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
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Priority to JP2001547924A priority Critical patent/JP2003518669A/en
Priority to EP00987393A priority patent/EP1228671A2/en
Publication of WO2001047323A2 publication Critical patent/WO2001047323A2/en
Publication of WO2001047323A3 publication Critical patent/WO2001047323A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/1235—Non-linear conversion not otherwise provided for in subgroups of H03M1/12

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Amplifiers (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Rectifiers (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

A system and method for the dynamic power control of a ballast, wherein a compander (10) is used to reduce dynamic input range requirements of an analog-to-digital converter (ADC) (18) in power systems having dynamic signal ranges that are several orders of magnitude smaller than the largest signal being sampled. The present invention compresses an analog power signal (12) and then digitizes and expands the signal to attain a digitized signal having an amplitude identical to the analog signal (12), thereby providing a power control system that is less expensive and less complicated than conventional power systems. The present invention can use algorithms to calculate both the expansion values and correction values required for a power control circuit to adjust an output power level toward a desired value.
PCT/EP2000/012622 1999-12-22 2000-12-13 Compander for power control in a ballast WO2001047323A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001547924A JP2003518669A (en) 1999-12-22 2000-12-13 Compander for power control in ballast
EP00987393A EP1228671A2 (en) 1999-12-22 2000-12-13 Compander for power control in a ballast

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/469,323 1999-12-22
US09/469,323 US6577262B1 (en) 1999-12-22 1999-12-22 Compander for power control in a ballast

Publications (2)

Publication Number Publication Date
WO2001047323A2 WO2001047323A2 (en) 2001-06-28
WO2001047323A3 true WO2001047323A3 (en) 2002-06-06

Family

ID=23863332

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/012622 WO2001047323A2 (en) 1999-12-22 2000-12-13 Compander for power control in a ballast

Country Status (5)

Country Link
US (1) US6577262B1 (en)
EP (1) EP1228671A2 (en)
JP (1) JP2003518669A (en)
CN (1) CN1378767A (en)
WO (1) WO2001047323A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7233624B2 (en) * 2002-06-11 2007-06-19 Interdigital Technology Corporation Method and system for all digital gain control

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06164390A (en) * 1992-11-24 1994-06-10 Roland Corp Compander
DE4409063C1 (en) * 1994-03-11 1995-08-10 Imc Messysteme Gmbh Analogue=to=digital conversion appts.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3883337D1 (en) 1987-10-06 1993-09-23 Peicom Sound Systems Gmbh, 6380 Bad Homburg, De
US4940947A (en) 1989-02-28 1990-07-10 Oneac Corporation Line noise signal measurement system using analog signal compression with digital linearity correction
US5023490A (en) 1989-06-21 1991-06-11 General Electric Company Analog signal compression circuit
US5760730A (en) 1997-04-03 1998-06-02 Advanced Micro Devices, Inc. Method and system for analog-to-digital signal conversion with simultaneous analog signal compression
US6072282A (en) * 1997-12-02 2000-06-06 Power Circuit Innovations, Inc. Frequency controlled quick and soft start gas discharge lamp ballast and method therefor
US6137240A (en) * 1998-12-31 2000-10-24 Lumion Corporation Universal ballast control circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06164390A (en) * 1992-11-24 1994-06-10 Roland Corp Compander
DE4409063C1 (en) * 1994-03-11 1995-08-10 Imc Messysteme Gmbh Analogue=to=digital conversion appts.

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CANTARANO S ET AL: "LOGARITHMIC ANALOG-TO-DIGITAL CONVERTERS: A SURVEY", IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT,US,IEEE INC. NEW YORK, vol. IM-22, no. 3, 1 September 1973 (1973-09-01), pages 201 - 213, XP000676103, ISSN: 0018-9456 *
KARI KALLIOJARVI ET AL: "NOVEL FLOATING-POINT A/D- AND D/A-CONVERSION METHODS", INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS. (ISCAS),US,NEW YORK, IEEE, 30 May 1994 (1994-05-30), pages 1 - 4, XP000593000, ISBN: 0-7803-1916-8 *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 486 (E - 1604) 9 September 1994 (1994-09-09) *

Also Published As

Publication number Publication date
JP2003518669A (en) 2003-06-10
US6577262B1 (en) 2003-06-10
CN1378767A (en) 2002-11-06
EP1228671A2 (en) 2002-08-07
WO2001047323A2 (en) 2001-06-28

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