Recently Issued Patents

Point-Wise Phase Matching for Nonlinear Frequency Generation in Dielectric Resonators

  • Patent Number: 9,285,652

  • Issued: 3/15/2016

  • Inventors: Nan Yu, Dmitry Strekalov, Guoping Lin, Josef Furst

An optical resonator fabricated from a uniaxial birefringent crystal, such as beta barium borate. The crystal is cut with the optical axis not perpendicular to a face of the cut crystal. In some cases the optical axis lies in the plane of the cut crystal face. An incident (input) electromagnetic signal (which can range from the infrared through the visible to the ultraviolet) is applied to the resonator. An output signal is recovered which has a frequency that is an integer multiple of the frequency of the input signal. In some cases a prism is used to evanescently couple the input and the output signals to the resonator.

Point Wise Phase Matching Diagram

Method and Circuit for Injecting a Precise Amount of Charge Onto a Circuit Node

  • Patent Number: 9,294,077

  • Issued: 3/22/2016

  • Inventors: Bruce Hancock

A method and circuit for injecting charge into a circuit node, comprising (a) resetting a capacitor's voltage through a first transistor; (b) after the resetting, pre-charging the capacitor through the first transistor; and (c) after the pre-charging, further charging the capacitor through a second transistor, wherein the second transistor is connected between the capacitor and a circuit node, and the further charging draws charge through the second transistor from the circuit node, thereby injecting charge into the circuit node.

A method and circuit for injecting charge into a circuit node

Electrolytes for Wide Operating Temperature Lithium-Ion Cells

  • Patent Number: 9,293,773

  • Issued: 3/22/2016

  • Inventors: Marshall Smart and Ratnakumar Bugga

Provided herein are electrolytes for lithium-ion electrochemical cells, electrochemical cells employing the electrolytes, methods of making the electrochemical cells and methods of using the electrochemical cells over a wide temperature range. Included are electrolyte compositions comprising a lithium salt, a cyclic carbonate, a non-cyclic carbonate, and a linear ester and optionally comprising one or more additives.

Electrolytes for Lithium-ion Electrochemical cells


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