Abstract:
A transistor array including a plurality of transistors. Each transistor includes an emitter. An emitter region contact overlies each emitter region. At least one base region underlies each emitter region and is common to a plurality of transistors in the array. At least one base contact overlies the at least one base region and is associated with each transistor. A plurality of the base contacts are common to at least two transistors in the array. At least one collector reach through is associated with each transistor. A collector reach through contact overlies each collector reach through. A buried layer subcollector region of electrically conducting material electrically connects the collector reach through region to the collector pedestal region of each transistor.
Abstract:
PROBLEM TO BE SOLVED: To provide a novel improved radio frequency power amplifier that is used for a battery-driven handset unit of a radio communication system. SOLUTION: This radio frequency power amplifier has a small power signal amplification path and a high power signal amplification path and is used for the battery-driven handset unit of the radio communication system. Depending on whether the handset is placed within a prescribed distance from a base station or outside the prescribed distance, a logic bias means in the handset selects the small power signal amplification path or the high power signal amplification path. Thus, a signal from the handset received by the base station reaches a required power level.
Abstract:
The invention provides a PIN diode having a laterally extended I-region (5). The invention also provides a method of fabricating the inventive PIN diode compatible with modern RF technologies such as silicon-germanium BiCMOS processes.
Abstract:
The invention provides a PIN diode having a laterally extended I-region (5). The invention also provides a method of fabricating the inventive PIN diode compatible with modern RF technologies such as silicon-germanium BiCMOS processes.
Abstract:
The invention provides a PIN diode having a laterally extended I-region (5). The invention also provides a method of fabricating the inventive PIN diode compatible with modern RF technologies such as silicon-germanium BiCMOS processes.
Abstract:
Field effect transistors are made by (a) prepg. a semiconductor substrate of first conductivity type (b) forming a masking layer with a drain window (c) introducing an opposite type impurity into the exposed region through the window, (d) diffusing the impurity into the substrate and (e) introducing an additional impurity of second type conductivity into the opening to form a concentration of second type impyrities, important to the neighbourhood of the opening so that the drain region has a gradual changing impurity profile. Design of the device permits use of or max. working voltage for a given channel length.