Appunti Elettronica analogica sui Feedback - Parte I

Appunti: Microelectronics (B. Razavi,

12 Feedback

Wiley 2014) Capitolo

Parte I

FEEDBACK

iii in a WEU THE

DESIGNEDNECATIVE FEEDBACK

FEEDBACKSYSTEM

iii repairofTHE

core input

a Good SIGNAL

is

Siena

iiii.it

iiiiiii

iiiiiii.ie man

ÑÉÉÉ Aka

E maximize

A K 0 can

easednor

Gaina open

coop Gain

ELITE j.IE

Efa Eca ffsenooBuTREnce

TEETEER X 0

SET ZERO

TO

INPUT

0 BreakTHE anewEre

Loop

me VEST

AN

USE THE

BREAK

POINT

AT

INPUT KA

LOOP

GAIN Yes

ii Effi

FEEL

Iff A A

LoopGain Rita GAIN

LOOP

EEEIE.ge

HI 9

Effing

Toto

iii

ftp.II.fi t.tn

RPFR ID

K

Vin

Vinz

iD

zunloxE Vin

Wine

gue

gueUgs t.EE EE EEaEFIE

Esv

Fyffe

ÉÉfÉ É

ÉÉ

no

are way feedback

neatwe

s 1

P2 as a1st

example

Pa HIGHER LINEARITY EE

E.

I

I

E E a

BW AT costof LESS

THE

INCREASES coop

GAININ CLOSED

I P.a

D3 O IMPEDANCES HIGHER

LINEARITY

ÉÉE

If as

E ROOT

Rare

PREREQUISITES TYPES of Amplifiers

for are.is

analysis

of FEEDBACK

A vs REAL

IDEAL sources IE

EEII.fi

iiE.EE.nanseonna

as nceut

FII

Fi III

Current

I O 4

FOR

THE AMPLIFIER

TOPOLOGIES

Root

VIN Rin 0

00 war

III.fi

iEEEEEEIEEewar

Root

Rin

IN o

0

VII Root

Rin 00

III Rin 0 Root 00 AMP

FOUR

OF

OF MODELS

EXAMPLE TOPOLOGIES

AMPUFIER IMPLEMENTATION

VIV t.IE

hepatitis n

Ii i AMP

TRANSIMPED

III EEEEE

GE

it AMP

tRAnscond

ftp.fft

ntgRo

Find hÑÉ amp

current

IE

SENSE MECHANISM

RETURN to two

ADD vatsoes

i i

i BE in

Must

THE

iii IEEIIIESE.INT's

i

ii I

RE

EXAMPLE IIIEiIII

EE EIEE.fi

f

F EQ

VENN

THE

NORTON

RD iiiiE

LE

iÉg

gyftiii .EE

5

I É

WE WANT A FEEBACK

NEGATIVE ff

e

wopan

of caution

SAMESTEPS of gf

EIIIEE.fi

FOUR FEEDBACK

TOPOWGIES

Y U IEE.PT L

EunN mean

IIII

V I I

I current

connent INPUT

IMPEDANCE EI

EE

QEEE

ewsEDwop output IMPEDANCE iEEE

FEE.EE

EXAMPLE iii

HIE

FR cnn. q

fI

IEfEII g