Review for Final Exam MOSFET and BJT Basis

Review for Final Exam  MOSFET and BJT Basis

Review for Final Exam

MOSFET and BJT Basis of amplifiers Obtaining linear amplification

Small-signal voltage Gain Equivalent-circuit models: model and T model Basic configurations and Biasing Analyze discrete-circuit amplifiers MOSFET

1 2 = h ) (1+ ) ( 2

( ) =

[ ] 1

hh hh = BJT

Collector current Base current Emitter current

VT : the thermal potential is common-emitter current gain Minority-Carrier Distribution

Equivalent Circuit Models 6.3 BJT Circuit at DC Use simple model: |VBE|=0.7V for a conducting transistor and |VCE|=0.2V for a saturated transistor

Accurate model will increase complexity and impede insight in design SPICE simulation in the final stage of design Basis of amplifiers

7.1.3 The voltage-transfer characteristics VTC is non-linear: For BJT: Obtaining Linear Amplification by Biasing the

Transistor A dc voltage VGS is selected to obtain operation at a point Q on the segment AB of the VTC Q: bias point or dc operation point, or quiescent point

The signal to be amplified is vgs(t) Example 7.1 Solution: VGS=0.6V, VOV=0.2V

13 Small-Signal Operation and Models 7.2.1 The MOSFET Case 14

The signal current in the drain terminal Small-signal condition: 15

Small-signal voltage gain Modeling the Body effect 17

Collector current and Transcoductance If: 18 Equivalent

circuit models 19 20

Configurations 7.4 Biasing 1. To establish in the drain (collector) a dc current that is predictable, and insensitive to

variations in temperature and to large variations in parameter values between devices of the same type; 2. To locate the dc operating point in the active region and allow required output signal swing without the transistor leaving the

active region. 22 Biasing The MOSFET case

- E.g., biasing by fixing VG and connecting a Rs Example 7.11 Solution: design the resistance by distributing VDD into 3 equal part on RD, transistor VDS and RS

(each part = 5 V) 24 7.5 Discrete-Circuit Amplifiers (self-reading) A. A common-source (CS) amplifier

25 C. A CE amplifier with an emitter resistance Re With Re must use T Model

26

Recently Viewed Presentations

  • The Presidency of William Jefferson Clinton 1993-2001 Road

    The Presidency of William Jefferson Clinton 1993-2001 Road

    During the campaign, Clinton was accused of sexual harassment by Paula Jones. Clinton was also accused of having an inappropriate relationship with Gennifer Flowers. Despite the scandals involving these women, Clinton was elected.
  • ELECTRICAL TECHNOLOGY Volume-IV B.L. THERAJA A.K. THERAJA Copyright

    ELECTRICAL TECHNOLOGY Volume-IV B.L. THERAJA A.K. THERAJA Copyright

    op-amp symbol Standard triangular symbol for an OP-AMP is shown in Fig. 68.1 (a) though the one shown in Fig. 68.1 (b) is also used often. In Fig. 68.1 (b), the common ground line has been omitted.
  • Architektur Moderner Internet Applikationen 22.-24.4.2004 TU Wien/Ausseninstitut Enterprise

    Architektur Moderner Internet Applikationen 22.-24.4.2004 TU Wien/Ausseninstitut Enterprise

    Architektur Moderner Internet Applikationen 22.-24.4.2004 TU Wien/Ausseninstitut Enterprise Computing - Java und .NET DI Christian Donner cd (at) donners.com
  • Svjetlovodi - Fer

    Svjetlovodi - Fer

    ITU-T G.655 vlakno s pomaknutom non-zero disperzijom Mogu umanjiti nelinearna izobličenja tako da izbacuju nultu disperziju izvan trećeg optičkog prozora gušenje oko 0,2dB/km i polarizacijska disperzija 0,1ps/km. Konstrukcija kabela Primjer kabela Primjer kabela Konektori Zaključak avioindustrija, kabelska televizija, podmornice, internet...
  • Big Question:

    Big Question:

    Big Question: How does technology help adventurers reach new places? Monday. Tuesday. Wednesday. ... ooze - soft mud or slime, ... parts and sensing devices controlled by a computer. Vocabulary Words. sediment - material that settles to the bottom of...
  • PCG Meeting Template - ICPE

    PCG Meeting Template - ICPE

    ICPE High Level Meeting - Ljubljana, Slovenia There are mixed demands of GLCs. Commercial role and expected to provide financial returns - they are listed companies and have private and minority shareholders On the other, they are pressured to help...
  • Persuasive 5 paragraph essay against bullying

    Persuasive 5 paragraph essay against bullying

    Step Three: Write a 3-Prong Thesis. The thesis statement is the last sentence of your introduction paragraph. These are the three points that you will be arguing in your paper that will go into one sentence.
  • University of Kansas | School of Engineering Similarities

    University of Kansas | School of Engineering Similarities

    They originally tried a MVNO type platform with Sprint called Pivot, they announced several months ago to terminate the agreement due to billing platform and customer confusion issues. This JV should allow them to require a built in billing platform...