Avago Technologies International Sales Pte. Limited

Yongjie Jiang

John S Walley

Mark David Rutherford

Jay Edward Ackerman

Kevin Vannorsdel

John Lynn McNitt

A converter includes a first circuit. The first circuit includes a first input that receives a power supply signal, a second input that receives a first signal, and a first output that outputs a second signal having an amplitude that is based on a frequency of the first signal. The first signal is based on an error value and a third signal, and the third signal is independent of feedback of the first circuit. The converter also includes a second circuit having a second output coupled to the second input and that outputs the third signal. The second circuit nonlinearly adapts the third signal based on the power supply signal and a reference signal.

Methods and devices for operating converters

Systems and methods for object detection are provided. The system includes at least a coil, a small signal generator, a small signal receiver, and a processor. The small signal generator includes a digital-to-analog converter circuit with programmable impedance. The small signal generator is configured to select an output impedance for the digital-to-analog circuit for capacitive sensing or radio-frequency identification (RFID) tag detection; generate a small signal according to the output impedance; and provide the small signal to the coil. The small signal receiver receives the small signal and a response signal associated with the small signal and measures the response signal to generate a measured signal. The processor compares the measured signal with one or more reference signals and performs capacitive sensing and/or detect a RFID tag according to the comparison.

Systems and methods for object detection

Systems and methods for object detection are provided. The system includes at least a coil, a main transmit inverter circuit, and one or more circuits. The one or more circuits are configured to generate a small signal, provide the small signal to the coil, receive a response signal, compare the response signal with one or more reference signals, and detect an object according to the comparison. The object is detected without providing a signal from the main transmit/receive inverter circuit to the coil.

A multi-loop voltage regulator with load tracking compensation includes a first closed-loop feedback network configured to receive a supply voltage from a power supply and drive an output voltage that is smaller than the supply voltage to a load. The multi-loop voltage regulator includes a second closed-loop feedback network connected to the first closed-loop feedback network and configured to regulate the output voltage between a first supply voltage rail and a second supply voltage rail for a given load current, in which the second closed-loop feedback network produces a gain that is greater than that of the first closed-loop feedback network. The multi-loop voltage regulator also includes a load tracking compensation circuit configured to detect a load current, and to increase the gain of the second closed-loop feedback network based on a dominant pole in the second closed-loop feedback network being a function of the detected load current.

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Fort Collins, CO, United States of America

Yongjie Jiang