Integrated Device Technology, Inc.

Jiahua Chemicals (shanghai) Ltd.

Jiahua Chemistry (binzhou) Co., Ltd.

Jiahua Chemicals Inc.

Yumin Zhang

Wei Wang

Jeffrey G Barrow

Yi Xie

Yue Yu

Zhijun Li

HaiQi Liu

Cheng Wu

Shawn Wang

Disclosed in the present invention is a polyether polyol refining method, comprising (1) neutralising or diluting crude polyether polyol to obtain a mixed solution; (2) flowing the mixed solution through a hydrophilic medium to aggregate same into a first density phase liquid and a second density phase liquid, the first density phase liquid being an aqueous solution containing alkaline metal ions and/or alkaline earth metal ions, and the second density phase liquid being polyether polyol; and (3) allowing the first density phase liquid to settle and separating same from the second density phase liquid to obtain refined polyether polyol. In the present refining method, using the hydrophilic medium for one-step removal of the alkaline ions and water in the polyether polyol simplifies the treatment steps, increases treatment efficiency, and can prevent polyether polyol loss; the obtained polyether polyol has low alkaline ion content and little odour. Also disclosed in the present invention is a polyether polyol refining apparatus, comprising a mixing unit and a separating unit, and being capable of refining polyether polyol with low alkaline ion content and little odour.

Polyether polyol refining method and refining apparatus

An apparatus having a first circuit and a second circuit. The first circuit may be configured to buffer an input signal received as a single-ended signal from a data bus connected between a memory channel and a memory controller. The second circuit may be configured to condition the input signal relative to a reference voltage to generate a differential signal. The reference voltage may be isolated from the second circuit in response to a transition from a power down condition to a power on condition.

Single-ended memory signal equalization at power up

A voltage regulator includes an amplifier to generate a difference voltage responsive to a comparison of a reference voltage and a feedback voltage. An output driver is coupled to the amplifier and drives a regulated output voltage responsive to the difference voltage. An impedance circuit is coupled between the output driver and a low power source and establishes the feedback voltage responsive to a current through the impedance circuit. A variation detector is operably coupled between the regulated output voltage and the difference voltage and is configured to modify the difference voltage. In some embodiments, the difference voltage is modified responsive to a rapid change of the regulated output voltage capacitively coupled to the variation detector. In other embodiments, the difference voltage is modified responsive to a rapid change of the feedback voltage capacitively coupled to the variation detector.

Apparatuses and methods responsive to output variations in voltage regulators

An integrated circuit device includes a reference voltage generator, which is configured to generate an adaptive reference voltage (Vref) that varies inversely relative to changes in magnitude of a data signal (DATA) received at an input thereof. This reference voltage generator includes a totem pole arrangement of at least two variable impedance elements having control terminals capacitively coupled (by respective capacitors) to the input. A current mirror is electrically coupled to the totem pole arrangement of at least two variable impedance elements. A comparator is also included. The comparator has a first input terminal that receives the adaptive reference voltage and a second input terminal that receives the data signal.

Adaptive reference voltage generators that support high speed signal detection

An output driver that includes a pull-up network comprising a first plurality of resistive branches forming a first R-2R resistive ladder structure, wherein the resistive branches of the pull-up network are coupled to a high voltage supply through pull-up switching transistors. The output driver may further include a pull-down network comprising a second plurality of resistive branches forming a second R-2R resistive ladder structure, wherein the resistive branches of the pull-down network are coupled to a low voltage supply through pull-down switching transistors. The output driver includes a control circuit to selectively activate or deactivate each of the first plurality of resistive branches and to selectively activate or deactivate each of the second plurality of resistive branches.

Growing community of inventors

Shanghai, China

Yumin Zhang