Abstract: A bias circuit includes a first transistor and a second transistor configured as a first current mirror. A first current source is arranged between a supply node and the first transistor first terminal. A bias circuit output is coupled to the second transistor second terminal. A second current mirror is coupled to the first current mirror and the bias circuit output. A second current source is arranged between the supply node and the second current mirror. A third transistor in a diode-connected configuration is coupled between the first transistor second terminal and a ground. Alternatively or in addition, the bias circuit includes a first variable capacitor coupled between the second transistor first terminal and the second transistor second terminal. A fourth transistor has a control terminal coupled to the supply node, a first terminal coupled to the supply node and a second terminal coupled to the second transistor first terminal.

Abstract: A bias circuit for a RF amplifier is described. The bias circuit includes a first transistor and a second transistor configured as a first current mirror. A first current source is arranged between a supply node and the first transistor first terminal. An output of the bias circuit is coupled to the second transistor second terminal. A second current mirror coupled to the first current mirror and the bias circuit output. The bias circuit includes a first resistor coupled between a first transistor control terminal and a second transistor control terminal and a variable capacitor coupled between the second transistor control terminal and a ground.

Abstract: There is provided a phase shifting device and method of manufacturing the same. The device comprises an auto-transformer comprising a primary winding configured to receive an input signal; and two secondary windings, wherein a first one of the two secondary windings is in phase with the primary winding and a second one of the two secondary windings is out of phase with the primary winding. The device also comprises a first switch coupled to an output signal of the first one of the two secondary windings of the auto-transformer; and a second switch coupled to an output signal of the second one of the two secondary windings of the auto-transformer. Output signals of the first and second switches are couplable to an output of the phase shifting device.

Abstract: A Pockels cell that includes two similar electro-optical crystals oriented to achieve temperature compensation on a horizontal metal base common to the two crystals, and a carrier structure. It includes, between the base and the carrier structure, a thermally conductive element, which has a configuration that is symmetric about a vertical plane passing between the two crystals, in order to symmetrically distribute, to the base, a heat flux generated in the carrier structure asymmetrically with respect to the vertical plane.

Abstract: In an embodiment there is: negative voltage generator configured to generate an output having a negative voltage from an input having a positive voltage comprising an input node configured to receive an alternating signal, an output node for outputting an output voltage of the generator and a ground node, a switching element configured to provide a conductive and non-conductive flow path between a first terminal and a second terminal in response to a control signal; a control element adapted to control the flow of current therethrough between a first terminal and a second terminal.

Abstract: An amplifier arrangement for amplifying an alternating signal, comprising an amplifier and an adaptive biasing circuit, the amplifier configured to receive an alternating signal for amplification and a bias signal for biasing the amplifier from the adaptive biasing circuit, the adaptive biasing circuit comprising a PTAT circuit wherein the PTAT circuit is configured to receive the alternating signal and modulate the bias signal based on the alternating signal.

Abstract: In an embodiment there is: A negative voltage generator configured to generate an output having a negative voltage from an input having a positive voltage comprising an input node configured to receive an alternating signal, an output node for outputting an output voltage of the generator and a ground node, a switching element configured to provide a conductive and non-conductive flow path between a first terminal and a second terminal in response to a control signal; a control element adapted to control the flow of current therethrough between a first terminal and a second terminal.

Abstract: An amplifier arrangement for amplifying an alternating signal, comprising an amplifier and an adaptive biasing circuit, the amplifier configured to receive an alternating signal for amplification and a bias signal for biasing the amplifier from the adaptive biasing circuit, the adaptive biasing circuit comprising a PTAT circuit wherein the PTAT circuit is configured to receive the alternating signal and modulate the bias signal based on the alternating signal.

Abstract: A device fixed to a first mast cooperates with a contact area located on the outside face of a second mast sliding substantially coaxially in the first mast. The device includes guide units including a roller mounted free to rotate about an axis orthogonal to the axis of the masts, a pad with a bearing face, and a device for displacing the axis of the roller perpendicular to the contact area of the mast, as a function of forces applied by the mast on the roller. The bearing area of the unit on the mast is thus formed by the roller only, or the roller and the pad.

Abstract: The present invention relates to a plastic comprising zinc sulphide and to its use.

Abstract: A package for a die comprising a thermally conducting carrier; a dielectric frame on the carrier, the frame having a recess therein for receiving a die; an electrically insulating lid adapted to be positioned on the frame to cover the recess, the lid having dimensions such that when covering the recess a portion of the lid extends beyond the frame creating at least one overhang; the frame having at least one electrically conducting frame path; and the lid having a corresponding electrically conducting lid path arranged such that when the lid is positioned on the frame a portion of the lid path overlies the frame path, the lid path extending onto the overhang beyond the frame.

Abstract: A device fixed to a first mast cooperates with a contact area located on the outside face of a second mast sliding substantially coaxially in the first mast. The device includes guide units including a roller mounted free to rotate about an axis orthogonal to the axis of the masts, a pad with a bearing face, and a device for displacing the axis of the roller perpendicular to the contact area of the mast, as a function of forces applied by the mast on the roller. The bearing area of the unit on the mast is thus formed by the roller only, or the roller and the pad.

Abstract: The invention relates to a service module for factories producing aluminium by fusion electrolysis. The turret (9) of the inventive service module (7) is provided with a determined tool set, wherein each tool (101, 102, 103) is mounted on a telescopic arm (111, 112, 113) which is fixed to the turret (9) by a hinge support (121, 122, 123) which enables said telescopic arm to be perpendicularly movable with respect to a determined hinge point without rotating around the main axis thereof. Said telescopic arms are interconnected by a mechanical connection device (200) which maintains the relative angular deviation between the perpendicular movements thereof within a given tolerance range. Said invention makes it possible to bring the tools closer without striking each other during the use thereof.