Digital and Mixed-Signal Subsystems
HRL is expanding its digital and mixed-signal integrated circuit efforts to increase system and subsystem impact. While high performance
analog- to-digital (ADC) conversion continues to be our core expertise, HRL is aggressively developing analog signal processing techniques
to further enhance subsystem performance. We continue to deliver low volume production quantities of wideband sigma-delta modulators, and
are preparing to produce a modest volume of Indium Phosphide Heterojunction Bipolar Transistor (InP HBT) based integrated circuits (ICs)
for LLC Member applications. "Heterojunction" refers to a semiconductor junction that consists of layers of different materials. This produces
excellent high frequency operation and low leakage. In this focus area, HRL is also working on enhancing other capabilities, including fast
direct digital synthesis ICs and high-speed optoelectronic ICs.
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RF Analog
HRL made important advancements in 2006 in high frequency
monolithic (single crystal) millimeter-wave integrated circuits (MMICs)
based on Gallium Nitride (GaN) and Indium Phosphide (InP) materials
technologies. Their size and manufacturability makes them desirable for
a wide range of radio frequency (RF) applications, including wireless
communications, millimeter-wave imaging, radar, and electronic warfare.
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