Since it has been recognized that this can only be achieved by eliminating reactive components (it is curious to recognize that, despite the fact that only transistors can contribute to the desired power gain, they occupy incomparably smaller chip area than capacitors or inductors), the tuned amplifier
design paradigm has been fast changing towards a more low frequency broadband design orientation, which has created a renewed interest in [A.sub.v], [A.sub.i], [Z.sub.m] and [G.sub.m], and thus in the old z-, y- and h-parameters.
On the basis of the preceding discussion and by making use of the special features of DMRs, a tuned amplifier and two types of oscillating circuits were designed and fabricated.
Figure 4 shows a basic configuration of a tuned amplifier using the DMR.
Experimental tuned amplifiers and oscillating circuits such as oscillator/multipliers and low phase noise VCOs using DMRs are expected to be of practical use for various kinds of radio equipment in the RF and microwave regions.
Design examples and performances of microwave devices such as tuned amplifiers, low phase noise VCOs and oscillator/multipliers (oscillators having a multiplier function) are demonstrated for verification.
This feature can be applied to tuned amplifiers and VCOs with wide frequency ranges.
The package contains the CDMA/AMPS 840 MHz harmonically tuned amplifier
that produces 1.5 W output power with typically 55 percent PAE.
A one-stage tuned amplifier
circuit was modeled in both SPICE and Libra as a test.
Karris covers basic electronic concepts and signals, semiconductor electronics, diodes, bipolar junction transistors, field effect transistors and PNPN devices, operational amplifiers, integrated circuits, pulse circuits and waveforms generators, frequency characteristics of single-stage and cascaded amplifiers, tuned amplifiers
, sinusoidal oscillators, compensated attenuators, and more.