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GB2420458B - Envelope detector circuit - Google Patents

Envelope detector circuit

Info

Publication number
GB2420458B
GB2420458B GB0425566A GB0425566A GB2420458B GB 2420458 B GB2420458 B GB 2420458B GB 0425566 A GB0425566 A GB 0425566A GB 0425566 A GB0425566 A GB 0425566A GB 2420458 B GB2420458 B GB 2420458B
Authority
GB
United Kingdom
Prior art keywords
detector circuit
envelope detector
envelope
circuit
detector
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
Application number
GB0425566A
Other versions
GB2420458A (en
GB0425566D0 (en
Inventor
David Murdoch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to GB0425566A priority Critical patent/GB2420458B/en
Publication of GB0425566D0 publication Critical patent/GB0425566D0/en
Publication of GB2420458A publication Critical patent/GB2420458A/en
Application granted granted Critical
Publication of GB2420458B publication Critical patent/GB2420458B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Networks Using Active Elements (AREA)
GB0425566A 2004-11-19 2004-11-19 Envelope detector circuit Expired - Lifetime GB2420458B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0425566A GB2420458B (en) 2004-11-19 2004-11-19 Envelope detector circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0425566A GB2420458B (en) 2004-11-19 2004-11-19 Envelope detector circuit

Publications (3)

Publication Number Publication Date
GB0425566D0 GB0425566D0 (en) 2004-12-22
GB2420458A GB2420458A (en) 2006-05-24
GB2420458B true GB2420458B (en) 2008-09-17

Family

ID=33548588

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0425566A Expired - Lifetime GB2420458B (en) 2004-11-19 2004-11-19 Envelope detector circuit

Country Status (1)

Country Link
GB (1) GB2420458B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852619A (en) * 1973-07-09 1974-12-03 Bell Telephone Labor Inc Signal shaping circuit
SU949663A1 (en) * 1981-01-20 1982-08-07 Львовский Ордена Ленина Политехнический Институт Им.Ленинского Комсомола Logarithm determining device
US4373139A (en) * 1979-04-30 1983-02-08 Motorola, Inc. Detectors
JPH05145360A (en) * 1991-11-19 1993-06-11 Canon Inc Optical receiver circuit and optical transmitter circuit
JPH10322131A (en) * 1997-05-21 1998-12-04 Maruyasu Kogyo Kk Envelope detecting circuit
US6365914B1 (en) * 2000-09-18 2002-04-02 Sharp Kabushiki Kaisha Semiconductor device provided with a built-in minute charge detecting circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852619A (en) * 1973-07-09 1974-12-03 Bell Telephone Labor Inc Signal shaping circuit
US4373139A (en) * 1979-04-30 1983-02-08 Motorola, Inc. Detectors
SU949663A1 (en) * 1981-01-20 1982-08-07 Львовский Ордена Ленина Политехнический Институт Им.Ленинского Комсомола Logarithm determining device
JPH05145360A (en) * 1991-11-19 1993-06-11 Canon Inc Optical receiver circuit and optical transmitter circuit
JPH10322131A (en) * 1997-05-21 1998-12-04 Maruyasu Kogyo Kk Envelope detecting circuit
US6365914B1 (en) * 2000-09-18 2002-04-02 Sharp Kabushiki Kaisha Semiconductor device provided with a built-in minute charge detecting circuit

Also Published As

Publication number Publication date
GB2420458A (en) 2006-05-24
GB0425566D0 (en) 2004-12-22

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