Abstract: An amplifier circuit includes a continuous-time linear equalizer, an adjustable gain circuit and a filter circuit. The continuous-time linear equalizer includes a first high-pass path, a first low-pass path, a second high-pass path, and a second low-pass path. The first high-pass path is used to increase a gain of a high-frequency part of a first signal source, and the second high-pass path is used to increase a gain of a high-frequency part of a second signal source. The filter circuit is used to amplify and filter the first signal source and the second signal source, and includes a fully-differential operational amplifier, a first filter network, and a second filter network.

Abstract: An echo estimation system includes a transceiver circuitry and a processor circuitry. The processor circuitry is coupled to the transceiver circuitry. The processor circuitry is configured to calculate linear echo power and non-linear echo power based on a signal under test in the transceiver circuitry. The linear echo power and the non-linear echo power are utilized to determine a quality of the transceiver circuitry or utilized to determine component parameters of the transceiver circuitry.

Abstract: An echo estimation system includes a transceiver circuitry and a processor circuitry. The processor circuitry is coupled to the transceiver circuitry. The processor circuitry is configured to calculate linear echo power and non-linear echo power based on a signal under test in the transceiver circuitry. The linear echo power and the non-linear echo power are utilized to determine a quality of the transceiver circuitry or utilized to determine component parameters of the transceiver circuitry.

Abstract: The present disclosure discloses a signal equalization apparatus. A channel length estimation circuit determines a transmission channel length of the input signal such that a processing circuit retrieves predetermined feed-forward equalizer coefficients. A feed-forward equalizer equalizes the input signal according to operation feed-forward equalizer coefficients. An auto gain circuit amplifies the input signal according to an offset signal. A signal adding circuit adds the amplified input signal and a feedback adjusting signal to generate an added input signal. A data slicer generates a data-slicing result and the offset signal according to reference thresholds based on the added input signal. A feedback equalizer equalizes the data-slicing result to generate the feedback adjusting signal according to operation feedback equalizer coefficients.

Abstract: The present disclosure discloses a signal equalization apparatus. A channel length estimation circuit determines a transmission channel length of the input signal such that a processing circuit retrieves predetermined feed-forward equalizer coefficients. A feed-forward equalizer equalizes the input signal according to operation feed-forward equalizer coefficients. An auto gain circuit amplifies the input signal according to an offset signal. A signal adding circuit adds the amplified input signal and a feedback adjusting signal to generate an added input signal. A data slicer generates a data-slicing result and the offset signal according to reference thresholds based on the added input signal. A feedback equalizer equalizes the data-slicing result to generate the feedback adjusting signal according to operation feedback equalizer coefficients.

Abstract: A device of promptly starting windowed applications installed on a mobile operating system (OS) provides a starting button on a mobile device running the mobile OS installed thereon to promptly start a windowed application menu. The windowed application menu can be used to add or remove applications installed on the mobile OS to be started under a windowed mode to or from the windowed application menu. When users press the starting button to open the windowed application menu and execute any application in the application menu, the selected application is displayed in the windowed mode. The windowed application menu includes, but is not limited to, default applications installed on the mobile OS. Execution of any third-party application under the windowed mode can be supported by the windowed application menu. Accordingly, the operational efficiency and convenience of the mobile OS can be enhanced.

Abstract: An electronic device and a method are adapted to identify window control commands in a multi-window system. The electronic device displays multiple windows each respectively having a title bar on a touch interface. The electronic device executes the method to identify a window control command according to a touch gesture from a movement of a touch point detected on the title bar of one of the windows. The user can easily touch the title bar to operate a certain window.

Abstract: A method and a device of starting applications installed on a mobile operating system (OS) is performed by a mobile device for the mobile OS to flag any application installed on the mobile OS as a windowed application and display the application under a multi-window mode when the application is started. When multiple applications are simultaneously started, the mobile OS sequentially determines if each application is a windowed application. If positive, the application is displayed under the multi-window mode, and the size and location of the displayed window frame with the application running thereon are adjustable, rendering higher operational efficiency and convenience of software applications installed on a mobile OS.

Abstract: An electronic device and a method are adapted to identify window control commands in a multi-window system. The electronic device displays multiple windows each respectively having a title bar on a touch interface. The electronic device executes the method to identify a window control command according to a touch gesture from a movement of a touch point detected on the title bar of one of the windows. The user can easily touch the title bar to operate a certain window.

Abstract: A method and a device of starting applications installed on a mobile operating system (OS) is performed by a mobile device for the mobile OS to flag any application installed on the mobile OS as a windowed application and display the application under a multi-window mode when the application is started. When multiple applications are simultaneously started, the mobile OS sequentially determines if each application is a windowed application. If positive, the application is displayed under the multi-window mode, and the size and location of the displayed window frame with the application running thereon are adjustable, rendering higher operational efficiency and convenience of software applications installed on a mobile OS.

Abstract: A device of promptly starting windowed applications installed on a mobile operating system (OS) provides a starting button on a mobile device running the mobile OS installed thereon to promptly start a windowed application menu. The windowed application menu can be used to add or remove applications installed on the mobile OS to be started under a windowed mode thereto or therefrom. When users press the starting button to open the windowed application menu and execute any application in the application menu, the selected application is displayed in the windowed mode. The windowed application menu includes, but is not limited to, default applications installed on the mobile OS. Execution of any third-party application under the windowed mode can be supported by the windowed application menu. Accordingly, the operational efficiency and convenience of the mobile OS can be enhanced.