摘要:
An MOS-bipolar hybrid-mode LDMOS device has a main gate input and a control gate input wherein the device operates in an MOS mode when both gate inputs are enabled, and operates in a bipolar mode when the main gate input is enabled and the control gate input is disabled. The device can drive the gate of a power MOSFET to deliver the high current required by the power MOSFET while in the bipolar mode, and provide a fully switching between supply voltage and ground to the gate of the power MOSFET while in the MOS mode.
摘要:
Embodiments disclosed herein describe an isolated switched-mode power supply with its output regulated from the primary side, by generating a sensing current using a sensing element coupled to the output of the power supply, and measuring a scaled version of the sensing current which depends on the output voltage, and calculating an estimate voltage representing the output voltage, and regulating the output of the isolated switched-mode power supply based on the estimate voltage.
摘要:
An apparatus for controlling humidity in a fuel cell is provided. The apparatus can include a housing having an interior surface defining a volume and containing at least one fuel cell disposed within the volume. The apparatus may also include a plurality of electrodes disposed within the volume. The apparatus can include an aperture defined by the housing through which at least one air gas stream can be in fluid communication with at least one of the plurality of electrodes. The apparatus can include a humidity-controlling component, wherein the humidity-controlling component is in fluid communication with the air gas stream prior to the air gas stream contacting the at least one of the plurality of electrodes, and humidity-controlling component being capable of controlling a relative humidity of the air gas stream. A method for controlling humidity in a fuel cell is provided.
摘要:
A semiconductor device, such as a LDMOS device, comprising: a semiconductor substrate; a drain region in the semiconductor substrate; a source region in the semiconductor substrate laterally spaced from the drain region; and a drift region in the semiconductor substrate between the drain region and the source region. A gate is operatively coupled to the source region and is located offset from the drain region on a side of the source region opposite from the drain region. When the device is in an on state, current tends to flow deeper into the drift region to the offset gate, rather than near the device surface. The drift region preferably includes at least first and second stacked JFETs. The first and second stacked JFETs include first, second and third layers of a first conductivity type, a fourth layer intermediate the first and second layers including alternating pillars of the first conductivity type and of a second conductivity type extending between the source and drain regions; and a fifth layer intermediate the second and third layers, including alternating pillars of the first and second conductivity types extending between the source and drain regions.
摘要:
A lateral Insulated Gate Bipolar Transistor (LIGBT) includes a semiconductor substrate and an anode region in the semiconductor substrate. A cathode region of a first conductivity type in the substrate is laterally spaced from the anode region, and a cathode region of a second conductivity type in the substrate is located proximate to and on a side of the cathode region of the first conductivity type opposite from the anode region. A drift region in the semiconductor substrate extends between the anode region and the cathode region of the first conductivity type. An insulated gate is operatively coupled to the cathode region of the first conductivity type and is located on a side of the cathode region of the first conductivity type opposite from the anode region. An insulating spacer overlies the cathode region of the second conductivity type. The lateral dimensions of the insulating spacer and the cathode region of the second conductivity type are substantially equal and substantially smaller than the lateral dimension of the cathode region of the first conductivity type.
摘要:
A semiconductor device, such as a LDMOS device, comprising: a semiconductor substrate; a drain region in the semiconductor substrate; a source region in the semiconductor substrate laterally spaced from the drain region; and a drift region in the semiconductor substrate between the drain region and the source region. A gate is operatively coupled to the source region and is located offset from the drain region on a side of the source region opposite from the drain region. When the device is in an on state, current tends to flow deeper into the drift region to the offset gate, rather than near the device surface. The drift region preferably includes at least first and second stacked JFETs. The first and second stacked JFETs include first, second and third layers of a first conductivity type, a fourth layer intermediate the first and second layers including alternating pillars of the first conductivity type and of a second conductivity type extending between the source and drain regions; and a fifth layer intermediate the second and third layers, including alternating pillars of the first and second conductivity types extending between the source and drain regions.
摘要:
A fuel cell assembly may be provided that includes a first cathodic electrode and a second cathodic electrode; an anodic electrode positioned between the first cathodic electrode and the second cathodic electrode; a first membrane positioned between the first cathodic electrode and the anodic electrode; a second membrane positioned between the second cathodic electrode and the anodic electrode; and a seal ring for sealing the fuel cell assembly, the seal ring comprising a water-refilling mechanism.
摘要:
A galvanic cell structure is provided. The galvanic cell structure includes an outer cylinder featuring air inlets, a cathode, an anode, a membrane separating the cathode from the anode, and an inner cylinder featuring fluid inlets that may provide a volume for storing and/or transferring fluid for use in the galvanic cell.
摘要:
A galvanic cell with a closed structure is provided. The cell may include a galvanic cell unit having a metal hydride anode, separators positioned on opposite sides of the metal hydride anode, oxygen electrodes positioned adjacent to the separators on sides opposite to the metal hydride anode, insulator plates positioned in contact with the oxygen electrodes, an electrolyte in contact with any one or more of the metal hydride anode, oxygen electrodes, insulator plates, or separators, and a pressure vessel enclosing the galvanic cell unit.
摘要:
An apparatus including a housing having walls is provided. The walls of the housing each have inner surfaces and outer surfaces. The walls may include apertures extending from the inner surface to the outer surface. The inner surfaces of the walls define a volume. The volume includes an electrode. The volume further includes a water-controlling separator disposed between the inner surface of the housing and the electrode. The water-controlling separator can block a flow of liquid from the electrode through the apertures to the ambient environment while allowing oxidant to flow from the ambient environment through the apertures to the electrode.