TW439027B - Power-saving device of audio-frequency processing circuit and its control method - Google Patents

Power-saving device of audio-frequency processing circuit and its control method Download PDF

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Publication number
TW439027B
TW439027B TW87112180A TW87112180A TW439027B TW 439027 B TW439027 B TW 439027B TW 87112180 A TW87112180 A TW 87112180A TW 87112180 A TW87112180 A TW 87112180A TW 439027 B TW439027 B TW 439027B
Authority
TW
Taiwan
Prior art keywords
audio
frequency
power
input signal
amplifying circuit
Prior art date
Application number
TW87112180A
Inventor
Min-Tian Shr
Original Assignee
Mitac Technology Corp
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 Mitac Technology Corp filed Critical Mitac Technology Corp
Priority to TW87112180A priority Critical patent/TW439027B/en
Application granted granted Critical
Publication of TW439027B publication Critical patent/TW439027B/en

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Abstract

There are provided a power-saving device of audio-frequency processing circuit and its control method. The device includes an audio-frequency sensing circuit for generating an indication signal based on the audio-frequency input signal to indicate whether the audio-frequency input signal has audio-frequency message, and a power control circuit for controlling the voltage source to supply power to the audio-frequency amplifying circuit based on the indication signal. When the audio-frequency input signal has no audio-frequency message, the indication signal controls the audio-frequency amplifying circuit to stop operating. When the audio-frequency input signal has audio-frequency messages, the indication signal controls the audio-frequency amplifying circuit to continue to operate. As such, the operation of the audio-frequency amplifying circuit depends on whether the audio-frequency input signal has effective audio-frequency messages. Therefore, the audio-frequency amplifying circuit is turned off when power consumption is not required, thereby achieving the purpose of power saving.
TW87112180A 1998-07-24 1998-07-24 Power-saving device of audio-frequency processing circuit and its control method TW439027B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW87112180A TW439027B (en) 1998-07-24 1998-07-24 Power-saving device of audio-frequency processing circuit and its control method

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Application Number Priority Date Filing Date Title
TW87112180A TW439027B (en) 1998-07-24 1998-07-24 Power-saving device of audio-frequency processing circuit and its control method

Publications (1)

Publication Number Publication Date
TW439027B true TW439027B (en) 2001-06-07

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TW87112180A TW439027B (en) 1998-07-24 1998-07-24 Power-saving device of audio-frequency processing circuit and its control method

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TWI487883B (en) * 2012-07-19 2015-06-11 Ind Tech Res Inst Readout apparatus and driving method for sensor
US9544707B2 (en) 2014-02-06 2017-01-10 Sonos, Inc. Audio output balancing
US9549258B2 (en) 2014-02-06 2017-01-17 Sonos, Inc. Audio output balancing
US9658820B2 (en) 2003-07-28 2017-05-23 Sonos, Inc. Resuming synchronous playback of content
US9681223B2 (en) 2011-04-18 2017-06-13 Sonos, Inc. Smart line-in processing in a group
US9729115B2 (en) 2012-04-27 2017-08-08 Sonos, Inc. Intelligently increasing the sound level of player
US9734242B2 (en) 2003-07-28 2017-08-15 Sonos, Inc. Systems and methods for synchronizing operations among a plurality of independently clocked digital data processing devices that independently source digital data
US9748647B2 (en) 2011-07-19 2017-08-29 Sonos, Inc. Frequency routing based on orientation
US9749760B2 (en) 2006-09-12 2017-08-29 Sonos, Inc. Updating zone configuration in a multi-zone media system
US9756424B2 (en) 2006-09-12 2017-09-05 Sonos, Inc. Multi-channel pairing in a media system
US9766853B2 (en) 2006-09-12 2017-09-19 Sonos, Inc. Pair volume control
US9787550B2 (en) 2004-06-05 2017-10-10 Sonos, Inc. Establishing a secure wireless network with a minimum human intervention
US9977561B2 (en) 2004-04-01 2018-05-22 Sonos, Inc. Systems, methods, apparatus, and articles of manufacture to provide guest access
US10031716B2 (en) 2013-09-30 2018-07-24 Sonos, Inc. Enabling components of a playback device
US10061379B2 (en) 2004-05-15 2018-08-28 Sonos, Inc. Power increase based on packet type
US10306364B2 (en) 2012-09-28 2019-05-28 Sonos, Inc. Audio processing adjustments for playback devices based on determined characteristics of audio content
US10324684B2 (en) 2018-05-07 2019-06-18 Sonos, Inc. Playback device synchrony group states

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US10303431B2 (en) 2003-07-28 2019-05-28 Sonos, Inc. Synchronizing operations among a plurality of independently clocked digital data processing devices
US10175932B2 (en) 2003-07-28 2019-01-08 Sonos, Inc. Obtaining content from direct source and remote source
US9658820B2 (en) 2003-07-28 2017-05-23 Sonos, Inc. Resuming synchronous playback of content
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US9727303B2 (en) 2003-07-28 2017-08-08 Sonos, Inc. Resuming synchronous playback of content
US9733892B2 (en) 2003-07-28 2017-08-15 Sonos, Inc. Obtaining content based on control by multiple controllers
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US9734242B2 (en) 2003-07-28 2017-08-15 Sonos, Inc. Systems and methods for synchronizing operations among a plurality of independently clocked digital data processing devices that independently source digital data
US9740453B2 (en) 2003-07-28 2017-08-22 Sonos, Inc. Obtaining content from multiple remote sources for playback
US10282164B2 (en) 2003-07-28 2019-05-07 Sonos, Inc. Synchronizing operations among a plurality of independently clocked digital data processing devices
US10157033B2 (en) 2003-07-28 2018-12-18 Sonos, Inc. Method and apparatus for switching between a directly connected and a networked audio source
US10157034B2 (en) 2003-07-28 2018-12-18 Sonos, Inc. Clock rate adjustment in a multi-zone system
US10146498B2 (en) 2003-07-28 2018-12-04 Sonos, Inc. Disengaging and engaging zone players
US10140085B2 (en) 2003-07-28 2018-11-27 Sonos, Inc. Playback device operating states
US10228902B2 (en) 2003-07-28 2019-03-12 Sonos, Inc. Playback device
US9778898B2 (en) 2003-07-28 2017-10-03 Sonos, Inc. Resynchronization of playback devices
US9778900B2 (en) 2003-07-28 2017-10-03 Sonos, Inc. Causing a device to join a synchrony group
US9778897B2 (en) 2003-07-28 2017-10-03 Sonos, Inc. Ceasing playback among a plurality of playback devices
US10185540B2 (en) 2003-07-28 2019-01-22 Sonos, Inc. Playback device
US10031715B2 (en) 2003-07-28 2018-07-24 Sonos, Inc. Method and apparatus for dynamic master device switching in a synchrony group
US10209953B2 (en) 2003-07-28 2019-02-19 Sonos, Inc. Playback device
US10133536B2 (en) 2003-07-28 2018-11-20 Sonos, Inc. Method and apparatus for adjusting volume in a synchrony group
US10120638B2 (en) 2003-07-28 2018-11-06 Sonos, Inc. Synchronizing operations among a plurality of independently clocked digital data processing devices
US10216473B2 (en) 2003-07-28 2019-02-26 Sonos, Inc. Playback device synchrony group states
US10175930B2 (en) 2003-07-28 2019-01-08 Sonos, Inc. Method and apparatus for playback by a synchrony group
US9977561B2 (en) 2004-04-01 2018-05-22 Sonos, Inc. Systems, methods, apparatus, and articles of manufacture to provide guest access
US10228754B2 (en) 2004-05-15 2019-03-12 Sonos, Inc. Power decrease based on packet type
US10303240B2 (en) 2004-05-15 2019-05-28 Sonos, Inc. Power decrease based on packet type
US10061379B2 (en) 2004-05-15 2018-08-28 Sonos, Inc. Power increase based on packet type
US10254822B2 (en) 2004-05-15 2019-04-09 Sonos, Inc. Power decrease and increase based on packet type
US10126811B2 (en) 2004-05-15 2018-11-13 Sonos, Inc. Power increase based on packet type
US10097423B2 (en) 2004-06-05 2018-10-09 Sonos, Inc. Establishing a secure wireless network with minimum human intervention
US9787550B2 (en) 2004-06-05 2017-10-10 Sonos, Inc. Establishing a secure wireless network with a minimum human intervention
US9866447B2 (en) 2004-06-05 2018-01-09 Sonos, Inc. Indicator on a network device
US9860657B2 (en) 2006-09-12 2018-01-02 Sonos, Inc. Zone configurations maintained by playback device
US9813827B2 (en) 2006-09-12 2017-11-07 Sonos, Inc. Zone configuration based on playback selections
US9766853B2 (en) 2006-09-12 2017-09-19 Sonos, Inc. Pair volume control
US9928026B2 (en) 2006-09-12 2018-03-27 Sonos, Inc. Making and indicating a stereo pair
US9749760B2 (en) 2006-09-12 2017-08-29 Sonos, Inc. Updating zone configuration in a multi-zone media system
US10228898B2 (en) 2006-09-12 2019-03-12 Sonos, Inc. Identification of playback device and stereo pair names
US10306365B2 (en) 2006-09-12 2019-05-28 Sonos, Inc. Playback device pairing
US9756424B2 (en) 2006-09-12 2017-09-05 Sonos, Inc. Multi-channel pairing in a media system
US10028056B2 (en) 2006-09-12 2018-07-17 Sonos, Inc. Multi-channel pairing in a media system
US10136218B2 (en) 2006-09-12 2018-11-20 Sonos, Inc. Playback device pairing
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US9681223B2 (en) 2011-04-18 2017-06-13 Sonos, Inc. Smart line-in processing in a group
US9686606B2 (en) 2011-04-18 2017-06-20 Sonos, Inc. Smart-line in processing
US9748647B2 (en) 2011-07-19 2017-08-29 Sonos, Inc. Frequency routing based on orientation
US10256536B2 (en) 2011-07-19 2019-04-09 Sonos, Inc. Frequency routing based on orientation
US9748646B2 (en) 2011-07-19 2017-08-29 Sonos, Inc. Configuration based on speaker orientation
US10063202B2 (en) 2012-04-27 2018-08-28 Sonos, Inc. Intelligently modifying the gain parameter of a playback device
US9729115B2 (en) 2012-04-27 2017-08-08 Sonos, Inc. Intelligently increasing the sound level of player
US9074954B2 (en) 2012-07-19 2015-07-07 Industrial Technology Research Institute Readout apparatus and driving method for sensor
TWI487883B (en) * 2012-07-19 2015-06-11 Ind Tech Res Inst Readout apparatus and driving method for sensor
US10306364B2 (en) 2012-09-28 2019-05-28 Sonos, Inc. Audio processing adjustments for playback devices based on determined characteristics of audio content
US10031716B2 (en) 2013-09-30 2018-07-24 Sonos, Inc. Enabling components of a playback device
US9781513B2 (en) 2014-02-06 2017-10-03 Sonos, Inc. Audio output balancing
US9549258B2 (en) 2014-02-06 2017-01-17 Sonos, Inc. Audio output balancing
US9544707B2 (en) 2014-02-06 2017-01-10 Sonos, Inc. Audio output balancing
US9794707B2 (en) 2014-02-06 2017-10-17 Sonos, Inc. Audio output balancing
US10324684B2 (en) 2018-05-07 2019-06-18 Sonos, Inc. Playback device synchrony group states

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