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TECHNICAL WORKSHOP MARATHON 2012. SIMULATION OF AMPLIFIERS USING NGSPICE. VISHNU V 2 nd Year M.Tech VLSI and Embedded Systems Govt. Model Engineering College, Thrikkakara. ANALYSIS OF AMPLIFIERS USING NGSPICE. CONSIDER THE AMPLIFIER SHOWN IN FIGURE. 2. MODEL DESCRIPTION OF TRANSISTOR.

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slide1

TECHNICAL WORKSHOP MARATHON 2012

SIMULATION OF AMPLIFIERS USING NGSPICE

VISHNU V

2nd Year M.Tech VLSI and Embedded Systems

Govt. Model Engineering College, Thrikkakara

slide2

ANALYSIS OF AMPLIFIERS USING NGSPICE

CONSIDER THE AMPLIFIER SHOWN IN FIGURE

2

slide3

MODEL DESCRIPTION OF TRANSISTOR

MODEL NAME

MODEL TYPE

.MODEL GENERICNPN

Q1 C BE GENERIC

slide8

NEED OF COUPLING CAPACITORS

WAVEFORM AT BASE NODE AND COLLECTOR NODE

OUTPUT

(COLLECTOR)

INPUT

(BASE)

slide9

NEED OF COUPLING CAPACITORS

WAVEFORM AT BASE NODE AND OUTPUT NODE

INPUT

(BASE)

OUTPUT

slide19

ANALYSIS OF BJT AMPLIFIERS

ANALYSE THE FOLLOWING CIRCUIT USING NGSPICE

slide21

DESIGN A COMMON EMITTER AMPLIFIER FOR THE GIVEN SPECIFICATIONS AND PLOT ITS TRANSIENT AND AC RESPONSE USING NGSPICE ??

(Use Circuit in ELECTRONIC CIRCUITS Lab)

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DESIGN COMMON BASE AMPLIFIER AND COMMON COLLECTOR AMPLIFIERFOR THE GIVEN CONFIGURATIONS AND PLOT ITS TRANSIENT AND AC RESPONSE USING NGSPICE AND COMPARE THE OUTPUTS

(Use Circuit in ELECTRONIC CIRCUITS Lab)

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MOS AMPLIFIERS

DIFFERENT TYPES OF MOS AMPLIFIERS

COMMON SOURCE AMPLIFIER

COMMON GATE AMPLIFIER

COMMON DRAIN AMPLIFIER

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MODEL DESCRIPTION OF MOSFET

MODEL TYPE

MODEL NAME

.MODEL MOS1 NMOS

M1 DGS B MOS1 W=22.0U L=0.6U

SCALING PARAMETERS

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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

slide26

COMMON SOURCE AMPLIFIER

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

slide30

DC ANALYSIS CONTROL LINE O/P CHARACTERISTICS OF MOSFET

DC VDS 0 5 0.2 VGS 1 4 1

PLOT -vds#branch vs V(2)

slide32

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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