Abstract: A multi-band RF transmitter circuit (30) for a wireless communication device combines a plurality of RF transmission blocks into a single transceiver integrated circuit which includes a shared broadband SVGA (32), a shared tunable balun (34), and an output switching network (38) at the output of the balun to support three different frequency bands. The outputs of the multi-band RF transmitter circuit are connected to separate external power amplifier circuits (42-44), where each power amplifier circuit generates an amplified signal for one of the plurality of predetermined frequency bands.

Abstract: A multi-band RF transmitter circuit (30) for a wireless communication device combines a plurality of RF transmission blocks into a single transceiver integrated circuit which includes a shared broadband SVGA (32), a shared tunable balun (34), and an output switching network (38) at the output of the balun to support three different frequency bands. The outputs of the multi-band RF transmitter circuit are connected to separate external power amplifier circuits (42-44), where each power amplifier circuit generates an amplified signal for one of the plurality of predetermined frequency bands.

Abstract: Image sensing apparatus includes an image pickup plate disposed generally orthogonally with respect to an expected direction of movement of an object, such as a finger, multiple image drive plates in spaced relation to the image pickup plate to define sensor gaps between respective image drive plates and the image pickup plate, and a reference plate disposed substantially parallel to the image pickup plate. The reference plate is spaced from the image pickup plate to permit common mode noise and coupling to be cancelled and is spaced from the image drive plates to permit a differential image signal to develop between the image pickup plate and the reference plate. A differential amplifier coupled to the image pickup plate and the reference plate provides noise cancellation. The apparatus may further include a comb plate spaced from the reference plate and coupled to a reference potential, such as ground.

Abstract: Image sensing apparatus includes an image pickup plate disposed generally orthogonally with respect to an expected direction of movement of an object, such as a finger, multiple image drive plates in spaced relation to the image pickup plate to define sensor gaps between respective image drive plates and the image pickup plate, and a reference plate disposed substantially parallel to the image pickup plate. The reference plate is spaced from the image pickup plate to permit common mode noise and coupling to be cancelled and is spaced from the image drive plates to permit a differential image signal to develop between the image pickup plate and the reference plate. A differential amplifier coupled to the image pickup plate and the reference plate provides noise cancellation. The apparatus may further include a comb plate spaced from the reference plate and coupled to a reference potential, such as ground.

Abstract: A capacitor has a first side and an opposite second side. The capacitor also includes a first conductive member having a first planar surface and a first side edge, a first electrical connection extending from the first conductive member adjacent the first side. A second conductive member has a second planar surface. The second planar surface is spaced apart from and parallel to the first planar surface of the first conductive member. The second planar surface and the first planar surface define a space therebetween. The second conductive member also includes a third planar surface that is spaced apart from and disposed parallel to the second planar surface opposite from the first planar surface. A second electrical connection extends from the second planar surface adjacent the first side. The second conductive member also includes an electrically conductive portion, disposed adjacent the second side, electrically connecting the second planar surface and the third planar surface.

Abstract: A capacitor has a first side and an opposite second side. The capacitor also includes a first conductive member having a first planar surface and a first side edge, a first electrical connection extending from the first conductive member adjacent the first side. A second conductive member has a second planar surface. The second planar surface is spaced apart from and parallel to the first planar surface of the first conductive member. The second planar surface and the first planar surface define a space therebetween. The second conductive member also includes a third planar surface that is spaced apart from and disposed parallel to the second planar surface opposite from the first planar surface. A second electrical connection extends from the second planar surface adjacent the first side. The second conductive member also includes an electrically conductive portion, disposed adjacent the second side, electrically connecting the second planar surface and the third planar surface.

Abstract: An electronic device (220) includes a component (105), such as a microprocessor, that generates heat and an electrochemical capacitor (200) used for thermal management. The electrochemical capacitor (200) has a first region, preferably the perimeter region, including electroactive material (160) and an electrolyte (165) and also has a second region, preferably the inner region, including heat sink material (170). When the component (105) and the electrochemical capacitor (200) are mounted within the device (220), the heat sink material (170) of the capacitor (200) is aligned with the component (105).

Abstract: A capacitor (14) is disposed in, for example, a ferrite shell (12). A winding (20) is formed around the shell, thereby providing an inductive component. Additional windings may be provided to form a transformer. In combining the two components into a unitary package, a space savings is realized, and assembly efficiency is increased.

Abstract: A power source (10) , preferably in the form of a battery pack, comprises a battery (14), an electrochemical capacitor (16), and a switch bridge (18). The capacitor increases the power delivery capability of the battery for periodic power bursts, increases it's life, and is electrically connected in parallel with the battery through a number of switches. The switch bridge is used to periodically reverse the orientation of the capacitor with respect to the battery to alleviate electrical stress on the capacitor.

Abstract: Amperometric electrochemical sensors for detection of an analyte gas in air are disclosed. The sensors can be used in a gas detector to detect the analyte gas and to compensate for the relative humidity and temperature of the air. In addition, an electrochemical sensor having high surface area electrodes, and an increased sensitivity, is disclosed.

Abstract: An electrochemical capacitor chip device (10) includes a plurality of capacitor subassemblies (12, 14, 16, 18, 20, and 22) arranged in stacked configuration. Each stacked capacitor assembly shares a single common electrode (48) from which extends a contact tab. Attached to contact tabs are lead pins (26, 28, 30 and 32) for effecting electrical and mechanical communication with, for example, a printed circuit board. The capacitor subassemblies may be preferably fabricated of electrochemical capacitor subassemblies employing gelled polymeric electrolyte structures.