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Radio Frequency Circuit Design, 2nd Edition
book

Radio Frequency Circuit Design, 2nd Edition

by W. Alan Davis
December 2010
Intermediate to advanced
424 pages
11h
English
Wiley-IEEE Press
Content preview from Radio Frequency Circuit Design, 2nd Edition

APPENDIX FTransistor and Amplifier Formulas

The following formulas are meant as a reminder of the fundamentals given in most standard electronics textbooks. Notation for the formulas have the traditional meanings. Depletion capacitances are all given with a negative sign in the denominator as in C = C0/(1 V/ϕ)γ. Consequently, when the junction is reverse biased, the minus sign turns into a positive sign. Figure F.1 presents the basic FET features and symbols. The transistor body terminal typically is connected to the source or to ground. When the source is not grounded, the body effect modifies the transistor properties. The equations using the Early voltage, VA, should conform with the sign convention used by SPICE (VA > 0).

FIGURE F.1 FET symbols.

bapp06f001

BIPOLAR TRANSISTOR PARAMETERS (BJT)

Description Formula
Collector current bapp06ue001
Transconductance bapp06ue002
Input resistance bapp06ue003
Output resistance bapp06ue004
Base charging capacitance CD = τFgm
Emitter–base junction
Input capacitance ...
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Publisher Resources

ISBN: 9781118099476