Abstract: An interface is disclosed. The interface can include a single node that can be configured to receive a state signal and a serial communication signal. The interface can also include a switch circuit and a switch control circuit, where the switch control circuit is capable of being influenced by the receipt of the state signal or the serial communication signal at the single node and can set the state of the switch circuit based on the receipt of the state signal. Additionally, a switch buffer circuit is coupled between the switch and the switch control circuit, where the switch buffer circuit is configured to prevent the serial communication signal from activating the switch circuit. As such, both the state signal and the serial communication signal can be transmitted over a single node without adversely affecting the operation of pre-existing components.

Abstract: System and methods are provided for monitoring a state of a switch element connecting a DC power supply to a load. A system includes a transformer having first and second windings, where a first end of the second winding electrically coupled to a first switch node of the switch element. The system also includes a transmit circuit configured for providing a waveform at the first winding and a sensor element having galvanically isolated input and output nodes for inducing a monitor signal at the output nodes in response to a signal at the input nodes. The system further includes a receive circuit coupled to the output nodes and configured for generating one or more output signals in response to the monitor signal. The system also includes capacitor elements for providing DC isolation for the second winding with respect to the first switch node and the sensor element.

Abstract: System and methods are provided for monitoring a state of a switch element connecting a DC power supply to a load. A system includes a transformer having first and second windings, where a first end of the second winding electrically coupled to a first switch node of the switch element. The system also includes a transmit circuit configured for providing a waveform at the first winding and a sensor element having galvanically isolated input and output nodes for inducing a monitor signal at the output nodes in response to a signal at the input nodes. The system further includes a receive circuit coupled to the output nodes and configured for generating one or more output signals in response to the monitor signal. The system also includes capacitor elements for providing DC isolation for the second winding with respect to the first switch node and the sensor element.

Abstract: A low noise current source includes first and second voltage input terminals. The current source further includes an amplifying device having an input terminal and an output terminal, where the output terminal is coupled to the second voltage input terminal via a load. The current source also includes a bias circuit coupled between the first voltage input terminal, the second voltage input terminal, and the input terminal. The current source additionally includes a first bypass circuit coupled between the first voltage input terminal and the input terminal, where the first bypass circuit configured to provide a substantially high electrical resistance and substantially no electrical impedance between the first voltage input terminal and the input terminal.

Abstract: A low noise current source includes first and second voltage input terminals. The current source further includes an amplifying device having an input terminal and an output terminal, where the output terminal is coupled to the second voltage input terminal via a load. The current source also includes a bias circuit coupled between the first voltage input terminal, the second voltage input terminal, and the input terminal. The current source additionally includes a first bypass circuit coupled between the first voltage input terminal and the input terminal, where the first bypass circuit configured to provide a substantially high electrical resistance and substantially no electrical impedance between the first voltage input terminal and the input terminal.

Abstract: Interfaces for coupling an electronic device to a power source control element and devices therefrom are provided. An interface includes a single node that is configured to receive a state signal and a serial communication signal from the electronic device. The interface also includes a switch circuit that is configured for providing a control signal for the power source control element based on the state signal, the switch signal capable of being influenced by the receipt of the state signal and the serial communication signal at the single node. The interface further includes a switch buffer circuit coupling the single node to the switch circuit, the switch buffer circuit comprising an impedance network configured to prevent the serial communication signal from activating the switch circuit.

Abstract: An apparatus for OFDM communications includes an equalizer filter configured to receive input data and to apply a tap setting to the input data to generate output data. The input data includes a first real component and a first imaginary component. The tap setting includes a second real component and a second imaginary component. The output data includes a third real component and a third imaginary component, and the third real component is time-multiplexed with the third imaginary component. A method for OFDM communications includes applying a tap setting to input data to generate output data.