Abstract: Activation systems and methods initiate High-Definition Multimedia Interface (HDMI) communication between an HDMI source and an HDMI sink through an HDMI receptacle of the source. These systems and methods are especially suited for use with mobile sources that generally operate from a battery that cannot provide the +5V signal which the HDMI protocol requires sources to place on the +5V pin of their HDMI receptacles. These systems and methods automatically detect the insertion of an HDMI cable into the source's HDMI receptacle and subsequently generate and apply the required +5V signal to the +5V pin of the source's HDMI receptacle to initiate HDMI communication. Because they are directed to use in mobile sources, the embodiments are configured to minimize current drain.

Abstract: Activation systems and methods initiate High-Definition Multimedia Interface (HDMI) communication between an HDMI source and an HDMI sink through an HDMI receptacle of the source. These systems and methods are especially suited for use with mobile sources that generally operate from a battery that cannot provide the +5V signal which the HDMI protocol requires sources to place on the +5V pin of their HDMI receptacles. These systems and methods automatically detect the insertion of an HDMI cable into the source's HDMI receptacle and subsequently generate and apply the required +5V signal to the +5V pin of the source's HDMI receptacle to initiate HDMI communication. Because they are directed to use in mobile sources, the embodiments are configured to minimize current drain.

Abstract: Phase-locked loop structures are provided that facilitate enhanced stability of loop-generated signals. They include an oscillator network, a feedback loop and a controller. The oscillator network generates a loop output signal with a frequency that varies in response to a control voltage and to a frequency-determining parameter, the feedback loop generates the control voltage in response to the loop output signal and a reference signal and the controller increments the frequency-determining parameter to maintain the control voltage within a predetermined control-voltage range. These structures enhance signal stability by facilitating the use of low-gain oscillator structures and they simplify and shorten loop operations because the structures operate in a closed-loop condition at all times.