Almost no test lab is complete without a spectrum or signal analyzer. Manufacturers are now offering these instruments in smaller sizes, as well as offering advanced capabilities like higher-frequency performance. These articles investigate some of the developments around the industry.
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Design and fabrication techniques for lumped-element circuits at microwave frequencies. A1.0-Gc, two-stage transistor amplifier illustrates the design procedure. Thin films and bonded transistor chips are used.
For a specific transistor process and family, a very strong relationship exists between the dc beta, hFE, and the high-frequency common-emitter current transfer ratio, hfe. This is primarily because of a basic difference between a...