Fi xe d- val ue
r e s i s t or
Var i abl e
r e s i s t or
Vol t age -
s e ns i t i ve
r e s i s t or
( var i s t or )
Re s i s t or
s
Sour c e s
Cons t ant -
vol t age
s our c e
Cons t ant -
c ur r e nt
s our c e
+
−
AC os c i l l at or
s our c e
Bat t e r i e
s
Si ngl e - c e l l
bat t e r y
+
−
Mul t i pl e - c e l l
bat t e r y
−
+
Ci r c ui t
pr ot e c t or s
Fus
e
Ci r c ui t
br e ake r
Capac i t or s
Fi xe d- val ue
c apac i t or
El e c t r ol yt i c
c apac i t or
Var i abl e
c apac i t or
Gr ound
Cr ys t al s
Pi e z oe l e c t r i c
c r ys t al
Ear t h
gr ound
Chas s i s or
f r ame
c onne c t i on
I s ol a t e d
Lamps
I nc ande s c e nt
l amp
Si gnal l a mp
Fl as hi ng s i gnal l a mp
Ne o n l a mp, DC
t ype
Ne o n l a mp, AC
t ype
Fl uor e s c e nt
l amp
Two- t e r mi nal
I nduc t or s
Fi xe d- val ue
i nduc t or s
Fi xe d- val ue
i nduc t or s
Wi t h ma g ne t i c
c or e
var i abl e
i nduc t or s
Audi o de vi c e s
Louds pe ake
r
Mi c r ophone
Ampl i f i e r
s
Si ngl e - e nde d
ampl i f i e r
Di f f e r e nt i al
ampl i f i e r
( or c ompar at or )
Nor t on
( c ur r e nt )
ampl i f i e r
−
+
Wave gui de
Ci r c ul ar
wave gui de
Re c t angul ar
wave gui de
Fl e xi bl e
wave gui de
Twi s t e d
wave gui de
Tr ans f or me r s
Tr ans f or me r ( ai r
core)
Tr ans f or me r ( i r on
core)
Tr ans f or me r
( f e r r i t e c or e )
Shi e l de d
t r ans f or me r
+
−
Cabl e
Two- c onduc t or
c abl e wi t h
gr ounde d s hi e l d
Coaxi al c abl e
wi t h gr ounde d
s hi e l d
Twi s t e d
pai r
St r i pl i ne
Unbal anc e d
s t r i pl i ne
Unbal anc e d
s t r i pl i ne
Cont ac t s
Fi xe d r e l ay
c ont ac t
Fi xe d s wi t c h
c ont ac t
Movi ng c ont ac t ,
l oc ki ng
Movi ng c ont ac t ,
nonl oc ki ng
Cl os e d
c ont ac t
Ope n c ont ac t
Make - be f or e -
br e ak c ont ac t
as s e mbl y
Br e ak- be f or e -
ma ke c ont ac t
as s e mbl y
Monos t abl e
mul t i vi br at
or
Monos t abl e ( s i ng l e - s ho t , one -
s hot )
1
Phas e
s hi f t e r s
Mat c he d phas e
s hi f t e r
φ
Sc hmi t t
t r i gge r
Ge ne r al
Swi t c he s
Si ngl e - pol e
s i ngl e - t hr ow
( s ps t )
Si ngl e - pol e
doubl e - t hr ow
( s pdt )
Doubl e - pol e
doubl e - t hr ow
( dpdt )
Pus h- but t on
s wi t c h, nor ma l l y
ope n
Pus h- but t on
s wi t c h, nor ma l l y
c l os e d
Mul t i po s i t i on
s wi t c h
P
SS
Re l ays
Fr om A, s ps t
nor ma l l y ope n
( ma ke )
Fr om B, s ps t
nor ma l l y c l os e d
( ma ke )
Fr om C, s ps t
( br e ak,
ma ke )
Fr om D, s ps t
( br e ak,
ma ke )
Fi l t e r s
Mode
f i l t e r
Bandpas s
f i l t e r
Low- pas s
f i l t e r
Hi gh- pas s
f i l t e r
Band- r e j e c t
f i l t e r
Mi c r owave
c i r c ui t s
Wave gui de
hybr i d
j unc t i on
St r i pl i ne
hybr i d
j unc t i on
Coupl i ng by
l oop t o s pac e
Coupl i ng by l oop t o
gui de d t r ans mi s s i on
pat h
Coupl i ng by l oop f r o m
c oaxi al t o c i r c ul ar
wave gui de , wi t h DC
gr ounds c o nne c t e d
Dual di r e c t i o na l
c oupl e r
Fi xe d- di r e c t i on
c i r c ul at or
Re ve r s i bl e -
di r e c t i on
c i r c ul at or
Mode s uppr e s s o r f or
bot h c oaxi al and
wave gui de
t r ans mi s s i on
H
E
4
λ
4
λ
4
λ
4
λ
3 4
λ
Di ode s
Re c t i f i e r
( j unc t i on) di ode
AK
Ze ne r
( undi r e c t i onal
br e akdown)
di ode
Bi di r e c t i o na l
br e akdown di ode
Cons t ant -
c ur r e nt ( f i e l d-
e f f e c t ) di ode
Tunne l di o de
Tunne l r e c t i f i e r
( bac kwar d)
di ode
Sc hot t ky ( hot -
c ar r i e r ) di ode
P- i - n di ode
Gunn di ode ,
al s o i mpat t
di ode
St e p-
r e c ove r y( s nap,
c har ge - s t or age )
di ode
Var ac t or
( var i abl e -
c apac i t anc e )
di ode
Tr ans i s t or
s
NPN
t r ans i s t or
Mul t i pl e -
e mi t t e r npn
t r ans i s t or
PNP
t r ans i s t or
E E E E
C
B
npn
Dar l i ng t on
t r ans i s t or
C
E
B
C
E
B
C
E
B
C
E
B
C
E
B
npn Sc hot t ky
t r ans i s t or C
E
B
Uni j unc t i on
t r ans i s t or ( UJT)
wi t h n- t y pe bas e
B2
E
B1
AK
AK
AK
AK
AK
AK
AK
AK
AK
AK
AK
AK
A K
AK
AK
AK