Abstract: Described herein is an adapter that can facilitate communications between a bi-polar serial communications port of a network device and a mobile device that communicates wirelessly. The adapter can include circuitry configured to communicate and receive wireless signals to and from the mobile device over air at least at 1 Mbit/s. Such circuitry can also be configured to consume at most 0.5 W and convert a wireless signal into a unipolar signal, and vice versa. The adapter can also include an energy storage component configured to store energy from a bi-polar serial signal received from the port. The adapter can also include circuitry, configured to receive the stored electrical energy and convert a unipolar signal to a bi-polar serial signal compatible with the port using the received energy. The adapter can also include circuitry configured to convert a bipolar signal to a unipolar signal.

Abstract: Described herein are techniques for monitoring signal paths of a media converter and finding faults within those signal paths. For instance, techniques may include monitoring signal paths associated with a media converter to discover a path failure, wherein each of the paths can include a RX portion associated with a different physical transmission media, and a path failure is discovered when a signal expected to be received by one of the RX portions is absent. The techniques may also include, upon discovery of a path failure, providing an emulated signal over a signal path associated with the path failure and/or providing an emulated signal over a remainder of the paths, such that all the signal paths continue to communicate signals, and such that at least one of the RX portions of the paths is identified as associated with the path failure.

Abstract: Described herein is an adapter that can facilitate communications between a bi-polar serial communications port of a network device and a mobile device that communicates wirelessly. The adapter can include circuitry configured to communicate and receive wireless signals to and from the mobile device over air at least at 1 Mbit/s. Such circuitry can also be configured to consume at most 0.5 W and convert a wireless signal into a unipolar signal, and vice versa. The adapter can also include an energy storage component configured to store energy from a bi-polar serial signal received from the port. The adapter can also include circuitry, configured to receive the stored electrical energy and convert a unipolar signal to a bi-polar serial signal compatible with the port using the received energy. The adapter can also include circuitry configured to convert a bipolar signal to a unipolar signal.

Abstract: Remote devices are classified or identified as devices configured to be powered by power injected onto a transmission medium such as a coaxial cable. From a local position, local classification circuitry applies a first low voltage DC signal to the transmission medium. Energy from the first DC signal is received by remote classification circuitry at the remote position of a remote device, and stored within an energy storage component. Using the stored energy, the remote classification circuitry generates a digital classification signal on the coax cable or transmission medium. Upon receipt of the digital classification signal at the local end, the local classification circuitry responsively applies a second higher voltage DC signal to the transmission medium. The second DC signal is received at the remote end and used in providing power to the remote device.

Abstract: A circuit for EL panel DC offset correction is provided. The circuit includes components such as an EL panel driver, an error circuit, a pulse width modulation circuit, and a low-pass filter. The low-pass filter performs low-pass filtering on the voltage across the EL panel to provide a low-pass filter output signal. Further, the error circuit receives the low-pass filter output signal and a reference signal, and provides an error signal. The DC bias across the EL panel is adjusted based, at least in part, on the error signal. In this way, DC offset correction is provided based on the negative feedback.

Abstract: A driver circuit for an electroluminescent (EL) lamp that consumes less power and reduces electromagnetic interference (EMI). Electrical charge is stored during a discharge cycle of an AC signal employed to illuminate an EL lamp, and subsequently reused during the AC signal's charging cycle. The reuse of electrical charge enables the driver circuitry to illuminate the EL lamp while drawing the least amount of power from a power supply, such as a battery. Also, multiple charge pumps can be sequentially/serially turned off during the discharge cycles of the AC signal driving the EL Lamp. By sequentially discharging the EL lamp, a waveform for the AC signal can be synthesized that more closely resembles a relatively symmetrical sinusoidal shape. The relatively symmetrical shape of the synthesized AC waveform serves at least in part to reduce spurious emissions of electromagnetic interference (EMI), audio noise, and improve the efficiency of the driver circuitry.