公开(公告)号：EP0843252A2

公开(公告)日：1998-05-20

申请号：EP97309013.7

申请日：1997-11-10

Applicant: Compaq Computer Corporation

Inventor： Tran, Thanh T. ,  Landry, John A. ,  Watts, Robert F.

IPC: G06F3/16

CPC classification number: G10H1/0058 ,  G10H2240/071

Abstract: An audio circuit for a computer includes a bidirectional modem connection, a microphone input, first and second audio output channels, and an audio synthesizing circuit arranged to produce first and second synthesized audio channels. In a first mode of operation the first synthesized audio channel is applied to the first audio output channel and the second synthesized audio channel is applied to the second audio output channel. In a second mode of operation the first and second synthesized audio channels are combined into a monotonic signal and applied to the second audio output channel, and audio signals from the bidirectional modem connection are applied to the first audio output channel.

Abstract translation: 一种用于计算机的音频电路包括双向调制解调器连接，麦克风输入，第一和第二音频输出通道以及被配置为产生第一和第二合成音频通道的音频合成电路。 在第一操作模式中，将第一合成音频通道应用于第一音频输出通道，并将第二合成音频通道应用于第二音频输出通道。 在第二操作模式中，第一和第二合成音频通道被组合成单调信号并被施加到第二音频输出通道，并且来自双向调制解调器连接的音频信号被施加到第一音频输出通道。

公开(公告)号：EP0757437A3

公开(公告)日：1997-10-22

申请号：EP96305595.9

申请日：1996-07-30

Applicant: Compaq Computer Corporation

Inventor： Tran, Thanh T.

IPC: H03G3/34

CPC classification number: H03G3/348

Abstract: An apparatus is described for providing power management of a computer. The apparatus includes circuitry configured to assert a power down signal when a low power mode is to be entered and to de-assert the power down signal when the low power mode is to be exited. An audio amplifier has a power input and a mute input, and a switch is connected to the power input and configured to selectively supply power to the power input. A power down circuit is provided responsive to the power down signal and connected to the mute input and the switch such that when the power down signal is asserted, the power down circuit activates the mute input and subsequently closes the switch, and when the power down signal is de-asserted, the power down circuit opens the switch and subsequently deactivates the mute input.

公开(公告)号：EP0757437B1

公开(公告)日：2002-06-12

申请号：EP96305595.9

申请日：1996-07-30

Applicant: Compaq Computer Corporation

Inventor： Tran, Thanh T.

IPC: H03G3/34

CPC classification number: H03G3/348

公开(公告)号：EP0785501A2

公开(公告)日：1997-07-23

申请号：EP97300274.4

申请日：1997-01-17

Applicant: Compaq Computer Corporation

Inventor： Tran, Thanh T.

IPC: G06F3/16 ,  G06F1/30

CPC classification number: H03F1/305 ,  H03F3/181 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/03 ,  H03F2200/321 ,  H03F2203/7227 ,  H03G3/348 ,  H04R3/007

Abstract: An audio power management system for a computer eliminates audible noise associated with the cycling of power to an audio amplifier for a computer. A diode is connected between the power supply rail and the power input to the audio amplifier. One or more decoupling capacitors is provided at the power input to the audio amplifier to insulate the audio amplifier from fluctuations at the power supply. The apparatus mutes the amplifier for a brief period shortly after power becomes available and mutes the amplifier immediately when power is removed to eliminate transient noises. In one embodiment, the muting of the audio amplifier is accomplished by FET switches. In a second embodiment, the muting of the audio amplifier is accomplished by analog switches. Additionally, the audio power management system eliminates audible noise associated with the waking-up or putting the computer to sleep. The audio system asserts a speaker mute signal before power is removed from the amplifier to reduce transient conditions. During power up, the speaker mute signal is applied to the amplifier for a period after power has been applied to the amplifier. This control is economically accomplished using a minimal number of digital outputs.

Abstract translation: 一种用于计算机的音频功率管理系统消除了与功率的循环，在音频放大器用于在计算机相关联的可听噪声。 二极管连接在电源轨和输入到音频放大器的功率之间。 一个或多个在所述功率输入端提供去耦电容到音频放大器在电源绝缘的波动音频放大器。 该装置用于静音的信期间的放大器功率变得可用和静音立即当电力被去除以消除瞬时噪声放大器之后。 在一个，实施例的音频放大器的静噪是由FET开关来完成的。 在第二实施例中，音频放大器的静噪是由模拟开关来实现的。 此外，音频电源管理系统消除了与清醒时或把电脑进入睡眠状态相关的噪音。 之前从放大器移除功率，以减少瞬态条件的音频系统断言的扬声器静音信号。 在加电期间，电源已被施加到放大器后的扬声器静音信号被施加到放大器的期间。 这种控制在经济上是使用数字输出的最小数目来实现的。

公开(公告)号：EP0757437A2

公开(公告)日：1997-02-05

申请号：EP96305595.9

申请日：1996-07-30

Applicant: Compaq Computer Corporation

Inventor： Tran, Thanh T.

IPC: H03G3/34

CPC classification number: H03G3/348

Abstract: An apparatus is described for providing power management of a computer. The apparatus includes circuitry configured to assert a power down signal when a low power mode is to be entered and to de-assert the power down signal when the low power mode is to be exited. An audio amplifier has a power input and a mute input, and a switch is connected to the power input and configured to selectively supply power to the power input. A power down circuit is provided responsive to the power down signal and connected to the mute input and the switch such that when the power down signal is asserted, the power down circuit activates the mute input and subsequently closes the switch, and when the power down signal is de-asserted, the power down circuit opens the switch and subsequently deactivates the mute input.

Abstract translation: 描述了一种用于提供计算机的电源管理的装置。 所述装置包括被配置为当要输入低功率模式时断言掉电信号并且当要退出低功率模式时解除断电信号的电路。 音频放大器具有电源输入和静音输入，并且开关连接到电源输入并被配置为选择性地向电源输入供电。 断电电路响应于掉电信号被提供并连接到静音输入和开关，使得当断电信号被断言时，掉电电路激活静音输入并随后闭合开关，并且当掉电 信号被取消断言，掉电电路打开开关，然后停用静音输入。

公开(公告)号：EP0785501B1

公开(公告)日：2006-07-19

申请号：EP97300274.4

申请日：1997-01-17

Applicant: Compaq Computer Corporation

Inventor： Tran, Thanh T.

IPC: G06F3/16 ,  G06F1/30 ,  H03G3/34

CPC classification number: H03F1/305 ,  H03F3/181 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/03 ,  H03F2200/321 ,  H03F2203/7227 ,  H03G3/348 ,  H04R3/007

公开(公告)号：EP0843252A3

公开(公告)日：1999-06-30

申请号：EP97309013.7

申请日：1997-11-10

Applicant: Compaq Computer Corporation

Inventor： Tran, Thanh T. ,  Landry, John A. ,  Watts, Robert F.

IPC: G06F3/16

CPC classification number: G10H1/0058 ,  G10H2240/071

Abstract: An audio circuit for a computer includes a bidirectional modem connection, a microphone input, first and second audio output channels, and an audio synthesizing circuit arranged to produce first and second synthesized audio channels. In a first mode of operation the first synthesized audio channel is applied to the first audio output channel and the second synthesized audio channel is applied to the second audio output channel. In a second mode of operation the first and second synthesized audio channels are combined into a monotonic signal and applied to the second audio output channel, and audio signals from the bidirectional modem connection are applied to the first audio output channel.

公开(公告)号：EP0785501A3

公开(公告)日：1998-03-11

申请号：EP97300274.4

申请日：1997-01-17

Applicant: Compaq Computer Corporation

Inventor： Tran, Thanh T.

IPC: G06F3/16 ,  G06F1/30

CPC classification number: H03F1/305 ,  H03F3/181 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/03 ,  H03F2200/321 ,  H03F2203/7227 ,  H03G3/348 ,  H04R3/007

Abstract: An audio power management system for a computer eliminates audible noise associated with the cycling of power to an audio amplifier for a computer. A diode is connected between the power supply rail and the power input to the audio amplifier. One or more decoupling capacitors is provided at the power input to the audio amplifier to insulate the audio amplifier from fluctuations at the power supply. The apparatus mutes the amplifier for a brief period shortly after power becomes available and mutes the amplifier immediately when power is removed to eliminate transient noises. In one embodiment, the muting of the audio amplifier is accomplished by FET switches. In a second embodiment, the muting of the audio amplifier is accomplished by analog switches. Additionally, the audio power management system eliminates audible noise associated with the waking-up or putting the computer to sleep. The audio system asserts a speaker mute signal before power is removed from the amplifier to reduce transient conditions. During power up, the speaker mute signal is applied to the amplifier for a period after power has been applied to the amplifier. This control is economically accomplished using a minimal number of digital outputs.