SANTA CLARA, Calif.-Hewlett-Packard Co. announced a new addition to its series of general-purpose Schottky-barrier diodes at the Wireless Symposium and Exhibition.
The crossover quad configuration, targeted for use in double-balanced mixer applications in cellular, personal communications services, TV distribution and radio local loop markets, provides four diodes in a single package, with the diodes bonded to diagonally opposed leads. This configuration is well-suited for use as a planar mixer, without requiring through-holes or backside traces on a printed circuit board, said the company.
HP also said it has developed a silicon self-biased transistor that operates at voltages as low as 1.5V and frequencies as high as 1.5 GHz. The unit, like a discrete transistor, requires input and output matching but incorporates internal bias circuitry. Because of these characteristics, this amplifier may shorten the design time of low-noise, low-current radio frequency amplifiers and provide more repeatable performance than the conventional method of using discrete transistors, the company said.
