Using the MAR-x series of very wideband monolithic integrated circuits (MMICs):
BUILDING YOUR OWN VLF TO MICROWAVE BROADBAND AMPLIFIER
Very wideband amplifiers have a bandpass (frequency
response) of several hundred megahertz, or more, typically
ranging from sub-VLF to the low end of the microwave
spectrum. An example might be a range of 100 kHz to
1,000 MHz (i.e., 1 GHz), although somewhat narrower ranges
are more common. These circuits have a variety of practical
uses: receiver preamplifiers, signal generator output
amplifiers, buffer amplifiers in RF instrument circuits, cable
television line amplifiers, and many others in communications
and instrumentation. Unfortunately, as valuable as they are,
they were not found in many electronics hobbyist situations
until recently. One of the reasons that very wideband
amplifiers are rarer than narrower band amplifier circuits is
that they are difficult to design and build. A daunting technical
task indeed.
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