A theft preventative apparatus is used to detect an attempted theft of an object and produce an audible alarm when an antenna (22) in the apparatus receives a radio wave signal from a transmitter (0). The apparatus can be deactivated using a bar-like releasing tool (K) inserted into the housing. Attempted theft can also be detected using a length of electrically conductive wire (3) securable to the object to be protected. The ends (30) of the wire are mounted to the housing. Disruption of the el...

A disposable audio processor for use with implanted hearing devices is provided. The audio processor may include a microphone, application specific integrated circuit performing both signal processing and signal modulation, a battery, and a coil. The audio processor is designed for specific types of hearing loss. Electronic signals are transmitted to an implanted receiver through the use of electromagnetic fields generated by the coil of the audio processor. The audio processor is a low power an...

A low power digital to analog converter (DAC) circuit is presented that is particularly suited for liquid-crystal display driver systems. The DAC according to one embodiment of the present invention uses a dedicated resistive divider chain that is selectively switched between adjacent pairs of coarse analog reference signals to generate finer analog reference signals. In a preferred embodiment, the resistance of the switches are used in combination with the resistive divider chain to form a volt...

Method and circuitry for reliably controlling the state of a transistor switch under high voltage conditions are disclosed. The present invention monitors the level of an external signal applied to one terminal of the switch. If the level of the external signal is lower than a reference voltage such as the power supply voltage of the integrated circuit that comprises the switch, the control of the switch is passed to a digital signal internal to the integrated circuit. If the level of the extern...

The invention concerns apparatus for processing signals induced by a stylus applied to a digitizing tablet. The tablet produces four signals, A, B, C, and D, indicative of four currents, induced at four different points on the tablet, by the stylus. The four signals indicate the position of the stylus. The invention derives stylus position based solely on two difference pairs (A-D) and (B-C). Further, the computation of the difference-pairs suppresses common-mode noise, which otherwise interfere...

A single, standard general purpose register address accesses not only the general purpose register, but, pursuant to user programming, FIFO counter status. In one embodiment, either the receive or transmit FIFO counter status can be accessed. The use of the general purpose register address for this purpose is preferably programmed using a bit from the control register on the chip.

A modular system that includes a plurality of modular elements that can be coupled together in a hidden manner with respect to the visible side. The modules are formed as areal, frame-like or three-dimensional shaped parts and are freely combinable with one another. At least substantially flat modular elements or flat modular element regions have a plurality of mutually spaced apart coupling and fixing members that project beyond a boundary edge of the module. Insert grooves are provided at a re...

Oligosaccharides are prepared using glycosyl transferase and activated glycosyl derivatives as donor sugars without the use of sugar nucleotides as donor sugars. A reaction mixture composition containing an activated glycoside derivative such as glycosyl fluoride or glycosyl mesylate, an acceptor substrate such as lactose or other oligosaccharide, a glycosyl transferase and a catalytic amount of a nucleotide phosphate or nucleotide phosphate analog is reacted to produce a glycosylated acceptor. ...

A scanner powered by the limited power available on a peripheral bus. In particular, the scanner can operate within the 2.2 watts provided over a USB connector. The scanner of the present invention uses a contact image sensor (CIS) which uses optics to distribute light from each light emitter to multiple pixel positions, preferably using a single LED for each color. An electric motor for driving the platen uses rare earth magnets to limit the power required. Instead of the traditional method of ...

Non-bonded ceramic protection is provided for metal surfaces in a plasma processing chamber, particularly heated metal electrode surfaces, in a plasma processing chamber, to prevent or inhibit attack of the heated metal surfaces by chemically aggressive species generated in the plasma during processing of materials, without bonding the ceramic material to the metal surface. In accordance with the invention the ceramic protection material comprises a thin cover material which is fitted closely, b...