Electronic Circuit Analysis

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UNIT - 6 Tuned Amplifiers - II In this Unit, • Single stage amplifiers in the three configurations of C.E, C.B, C.C, with design aspects are given. • Using the design formulae for Avo AI' R " Ro etc, the design of single stage amplifier circuits is to be studied. • Single stage JFET amplifiers in C.D, C.S and C.G configurations are also given. • The Hybrid - 1t equivalent circuit of BJT, expressions for Transistor conductances and capacitances are derived. • Miller's theorem, definitions forlp and!,. are also given. • Numerical examples, with design emphasis are given.
214 Electronic Circuit Analysis 6.1 Stagger Tuning Tuned amplifiers have large gain, since at resonance, Z is maximum. So Av is maximum. To get this large Av over a wide range of frequencies, stagger tuned amplifiers are employed. This is done by taking two single tuned circuits of a certain Bandwidth, and displacing or staggering their resonance peaks by an amount equal to their Bandwidth. The resultant staggered pair will have a Bandwidth, ..fi times as great as that of each of individual pairs. ~f Fig. 6.1 Variation of Av with f 6.2 Single Tuned Transistor Amplifier Va.; 6.3 Stability Considerations Fig. 6.2 Single tuned amplifier An electronic amplifier circuit or oscillator circuit becomes unstable, i.e;, will not perform the desired function, due to various reasons associated with circuit design aspects like Thermal stability, Bias considerations, output circuit, feedback, circuit etc. Let us consider th~se aspects. Thermal Effects: Any electronic circuit, when used continously, various components will get heated, due to power dissipation in each of the components. When the active..device in the circuit (BJT) also gets heated, due to the dependance of its characteristics on temperature, the operating point changes. So the device will not function as desired and the output from the eiectronic circuit will not be obtained as per specifications. Heat sinks are to be used, to dissipate the excess thermal energy and to keep the operating temperature of the active device within the limits. Heat sinks are good themal conductors designed suitably, to keep the temperature of the device within limits.
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Electronic Circuit Analysis Second
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Copyright © 2008, by Publisher All
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PREFACE TO SECOND EDITION Since pub
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x Many Textbooks are referred while
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xii 2.5 Frequency Effects .........
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xiv Unit - 7 Voltage Regulators ...
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xvi C x rx AVI All B.W Ie A=J; IH=
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Brief History of Electronics In sci
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xxi 1975: MSI (Multiplenum, Address
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UNIT - 1 Single Stage Amplifiers In
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Single Stage Amplifzers 3 (d) Type
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Single Stage Amplifiers Ie is in rn
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Single Stage Amplifiers 7 1.3.3 Cur
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Single Stage Amplifiers 9 1.4 Commo
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Single Stage Amplifiers 11 ~ The va
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Single Stage Amplifiers 13 The h-pa
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Single Stage Amplifiers 15 1.5.1 In
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Single Stage Amplifiers 17 Example
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Single Stage Amplifiers 19 ~ is the
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Single Stage Amplifiers 21 1.6 JFET
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Single Stage Amplifiers 23 The pric
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Single Stage Amplifiers 25 But rd»
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Single Stage Amplifiers 27 1. 7 Com
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Single Stage Amplifiers 29 1.9 Gain
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Single Stage Amplifiers 31 1. Write
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UNIT - 2 Multistage Amplifiers In t
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Multistage Amplifiers 35 2.1.5 Band
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Multistage Amplifiers 37 I stage: F
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Multistage Amplifrers 39 The equiva
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Multistage Amplifiers 41 Solution:
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Multistage Amplifiers 43 Example :
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Multistage Amplifiers 45 But Output
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Multistage Amplifiers 47 or ! If;;
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Multistage Amplifiers 49 2.2.5 Midb
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Multistage Amplifiers 51 2.2.8 Phas
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Multistage Amplifiers 53 R in = Rl
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Multistage Amplifiers 55 If for a g
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Multistage Amplifiers 57 2.5 Freque
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Multistage Amplifiers 59 2.6 Amplif
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Multistage Amplifiers 61 Ordinary G
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Multistage A'mpiifzers 63 !c = 1 e
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Multistage Amplifiers 65 When,f cha
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Multistage Amplifiers 67 Substituti
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Multistage Amplifiers 69 2.7.4 Outp
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Multistage Amplifiers 71 I' can be
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Multistage Amplifiers 73 The circui
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Multistage Amplifiers 75 Therefore,
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Multistage Amplifiers 77 2.9 CE - C
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Multistage Amplifiers 79 where Ad i
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Multistage Amplifiers 81 + vee BI B
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Multistage Amplifiers 83 8 pins. In
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Multistage Amplifiers 85 23. Compar
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Multistage Amplifiers 87 1. (a) R-C
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UNIT - 3 High Frequency Transistor
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High Frequency Transistor Circuits
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High Frequency Transistor (:ircuits
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High Frequency ·Transistor Circuit
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High Frequency Transistor CIraIIts
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High Fri/quency Transistor Circuits
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UNIT - 4 Power Amplifiers In this U
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Power Amplifiers 147 4.1.3 Class B
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Power Amplifiers 149 4.2.2 Transfor
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Power AmpUfiers 151 The assumption
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Power Amplifiers 153 VCC-::::,VCE=V
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Power Amplifiers 155 power. Moreove
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Power Amplifiers 157 In the low fre
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Power Amplifiers v f = Effective in
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Page 206 and 207: Power Amplifzers 183 I. Amplifiers
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Page 213 and 214: 190 Electronic Circuit Analysis 5.1
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Page 238 and 239: Tuned Amplifiers - II 21S Let P J =
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Page 254 and 255: Tuned Amplifiers - II 231 Solving f
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Page 260 and 261: UNIT - 7 Voltage Regulators In this
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262 Electronic Circuit Analysis The
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264 Electronic Circuit Analysis I m
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266 Electronic Circuit Analysis 8.5
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270 Electronic Circuit Analysis Xc
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272 Electronic Circuit Analysis Exa
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274 Electronic Circuit Analysis ,.2
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276 Electronic Circuit Analysis Not
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278 Electronic Circuit Analysjs The
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280 Electronic Circuit Analysis Exa
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282 Electronic Circuit Analysis Rec
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284 - Electronic Circuit Analysis S
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288 Electronic Circuit Analysis 50
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292 Eleetronic Circuit Analysis 2.
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294 Electronic Circuit Analysis The
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296 Electronic Circuit Analysis 1.
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APPENDIX-l Colour Codes for Electro
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APPENDIX 301 --=>- ~ / x W --9JE)-
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APPENDIX 303 Typical Standard Resis
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APPENDIX-3 Capacitors Capacitance T
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APPENDIX 30', Paper capacitors are
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APPENDIX 309 Foil Electrolyte soake
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APPENDIX-4 Inductors Magnetic Flux
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APPENDIX 313 J\ II II 1/ II II II (
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APPENOIX-5 Miscellaneous Ionic Bond
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APPENDIX 317 Porcelain coating wire
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APPENDIX 319 More Resistors 14 pin
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APPENDIX 321 The right-hand rule fo
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APPENDIX 323 -- Flux N (a) Single-t
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APPENDIX-6 Circuit Symbols 1 1 - 1
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APPENDIX-7 Unit Conversion Factors
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APPENDIX 329 Velocity Units mileslh
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APPENDIX 331 19 0.912 26.3 35.9 8.0
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Index Amplifiers 2, 21, 31 A common
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Electronic Circuit Analysis

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