Abstract: A dual band mixer has a common node for at least one radio frequency input and an intermediate frequency output. The dual band mixer also has a first transistor with a gate coupled to a first local oscillator input and a drain coupled to the common node, and a second transistor with a gate coupled to a second local oscillator input and a drain coupled to the common node. Interconnection circuitry turns off the second transistor when the first local oscillator input signal is applied to the first transistor, and turns off the first transistor when the second local oscillator input signal is applied to the second transistor.

Abstract: An optical fiber system that enables direct board-to-board optical communication is described. The optical fiber system does not require data transmission through the backplane and, consequently, avoids the complexity and possible communication delays that would be required if data transmissions had to go through the backplane. The optical fiber system includes a positioner that is configured to urge opposite ends of two or more optical fibers respectively toward opposed optical devices that are coupled to facing sides of adjacent printed circuit boards coupled to a common backplane. The optical fiber system may be installed and removed quickly and easily, and may be readily retrofitted into existing computer systems.

Abstract: An integrated memory comprises a plurality of data lines and a plurality of decoders being associated to each data line. Each data line can address a single memory cell or a plurality of memory cells. Also, each data line can be either a word line or a bit line of a memory. Each decoder generates an enable signal upon receiving of its associated address signal. A plurality of multiplexers having two inputs and an output associated to each data line are provided. The enable signal of each decoder is supplied to a first input of the associated multiplexer and to a second input of the multiplexer associated to the next higher addressed data line, and a control input for controlling said multiplexers.

Abstract: An improved zero phase restart circuit (308). A lookup table technique is employed to avoid an extensive series of calculations.

Abstract: The present invention relates to a conversion circuit that converts a single-ended signal to differential signals. According to an embodiment of the present invention, crosstalk is avoided by insuring that none of the transistors in the conversion circuit are directly connected to ground. By not having a transistor directly connected to ground, ground current is avoided and crosstalk associated with ground current is eliminated.