SIMULATION OF AMPLIFIERS USING NGSPICE VISHNU V 2 nd Year M.Tech VLSI and Embedded Systems Govt. Model Engineering College, Thrikkakara TECHNICAL WORKSHOP.

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Presentation transcript:

SIMULATION OF AMPLIFIERS USING NGSPICE VISHNU V 2 nd Year M.Tech VLSI and Embedded Systems Govt. Model Engineering College, Thrikkakara TECHNICAL WORKSHOP MARATHON 2012

ANALYSIS OF AMPLIFIERS USING NGSPICE 2 CONSIDER THE AMPLIFIER SHOWN IN FIGURE

MODEL DESCRIPTION OF TRANSISTOR.MODEL GENERIC NPN Q1 C B E GENERIC MODEL TYPEMODEL NAME

WHAT IS THE NEED OF COUPLING CAPACITORS IN AN AMPLIFIER ???

NEED OF COUPLING CAPACITORS B C E OUTPUT NODE

NEED OF COUPLING CAPACITORS B C E OUTPUT NODE

WHAT ARE THE WAVEFORMS AT BASE NODE AND COLLECTOR NODE ???

NEED OF COUPLING CAPACITORS WAVEFORM AT BASE NODE AND COLLECTOR NODE OUTPUT (COLLECTOR) INPUT (BASE)

NEED OF COUPLING CAPACITORS WAVEFORM AT BASE NODE AND OUTPUT NODE OUTPUT INPUT (BASE)

AFTER ADDING INPUT COUPLING CAPACITOR B C E OUTPUT NODE

INPUT VOLTAGE

VOLTAGE AT BASE NODE

VOLTAGE AT COLLECTOR NODE

OUTPUT NODE VOLTAGE

EFFECT OF BYPASS CAPACITOR BYPASS CAPACITOR

FREQUENCY RESPONSE PLOT WITH BYPASS CAPACITOR

FREQUENCY RESPONSE PLOT WITHOUT BYPASS CAPACITOR

ANALYSE BOTH FREQUENCY RESPONSE PLOTS AND MAKE CONCLUSIONS

ANALYSIS OF BJT AMPLIFIERS ANALYSE THE FOLLOWING CIRCUIT USING NGSPICE

PLOT THE FREQUENCY RESPONSE PLOTS FOR THE CIRCUIT WITH AND WITHOUT Rce RESISTANCE

DESIGN A COMMON EMITTER AMPLIFIER FOR THE GIVEN SPECIFICATIONS AND PLOT ITS TRANSIENT AND AC RESPONSE USING NGSPICE ?? (Use Circuit in ELECTRONIC CIRCUITS Lab)

DESIGN COMMON BASE AMPLIFIER AND COMMON COLLECTOR AMPLIFIER FOR THE GIVEN CONFIGURATIONS AND PLOT ITS TRANSIENT AND AC RESPONSE USING NGSPICE AND COMPARE THE OUTPUTS (Use Circuit in ELECTRONIC CIRCUITS Lab)

MOS AMPLIFIERS DIFFERENT TYPES OF MOS AMPLIFIERS COMMON SOURCE AMPLIFIER COMMON GATE AMPLIFIER COMMON DRAIN AMPLIFIER

MODEL DESCRIPTION OF MOSFET.MODEL MOS1 NMOS M1 D G S B MOS1 W=22.0U L=0.6U MODEL NAME MODEL TYPE SCALING PARAMETERS

MODEL DESCRIPTION OF MOSFET CONSIDERING ALL THE PARAMETERS.MODEL MOS1 NMOS VTO=0.7 GAMMA=0.5 LAMBDA=0.1 PHI=0.8 CGBO=0.38E-9 CGDO=0.4E-9 CGSO=0.4E-9 CJ=0.57E-3 CJSW=0.12E-9 TOX=9.5E-9 UO=460 LD=0.08E-6 JS=10E-9 MJ=0.5 MJSW=0.4 PB = 0.9

COMMON SOURCE AMPLIFIER PLOT THE TRANSIENT RESPONSE AND FREQUENCY RESPONSE OF THE FOLLOWING AMPLIFIER USING NGSPICE

OUTPUT WAVEFORMS – TRANSIENT RESPONSE

FREQUENCY RESPONSE

FREQUENCY RESPONSE WITHOUT BYPASS(CS) CAPACITOR

DC ANALYSIS CONTROL LINE O/P CHARACTERISTICS OF MOSFET DC VDS VGS PLOT -vds#branch vs V(2)

TRANSFER CHARACTERISTICS

LAB SESSION EXPERIMENTS LOW PASS AND HIGH PASS FREQUENCY RESPONSE DC ANALYSIS OF CE, CB and CC CONFIGURATIONS PLOT TRANSIENT AND FREQUENCY RESPONE OF - CE, CB and CC AMPLIFIERS - CS, CG and CD AMPLIFIERS EXPERIMENTS IN ELECTRONIC CIRCUITS LAB RECORD

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