electronics symbols.pdf

7/25/2019 electronics symbols.pdf

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Fixed-value resistor

Variable resistor

Voltage-sensitive

resistor varistor)

Resistors

Sources

Constant-voltage

source

Constant-current

source

AC oscillator source

Batteries

Single-cell battery

Multiple-cell battery

Circuit

protectors

Fuse

Circuit breaker

Capacitors

Fixed-value capacitor

Electrolytic capacitor

Variable capacitor

Ground

Crystals

Piezoelectric crystal

Earth ground

Chassis or frame

connection

Isolated


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Lamps

Incandescent lamp

Signal lamp

Flashing signal lamp

Neon lamp, DC type

Neon lamp, AC type

Fluorescent lamp

Two-terminal

Inductors

Fixed-value inductors

Fixed-value inductors

With magnetic core

variable inductors

Audio devices

Loudspeaker

Microphone

Amplifiers

Single-ended amplifier

Differential amplifier

or comparator)

Norton current)

amplifier

Waveguide

Circular waveguide

Rectangular waveguide

Flexible waveguide

Twisted waveguide

Transformers

Transformer air core)

Transformer iron core)

Transformer ferrite core)

Shielded transformer


3/8

Cable

Two-conductor cable

with grounded shield

Coaxial cable with

grounded shield

Twisted pair

Stripline

Unbalanced stripline

Unbalanced stripline

Contacts

Fixed relay contact

Fixed switch contact

Moving contact, locking

Moving contact, nonlocking

Closed contact

Open contact

Make-before-break

contact assembly

Break-before-make

contact assembly

Monostable

multivibrator

Monostable single-shot,one-shot)

1

Phase shifters

Matched phase shifter

Schmitt trigger

General

Switches

Single-pole single-

throw spst)

Single-pole double-

throw spdt)

Double-pole double-

throw dpdt)

Push-button switch,

normally open

Push-button switch,

normally closed

Multiposition switch

P

SS


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Relays

From A, spst normally

open make)

From B, spst normally

closed make)

From C, spst

break, make)

From D, spst

break, make)

Filters

Mode filter

Bandpass filter

Low-pass filter

High-pass filter

Band-reject filter

Microwave

circuits

Waveguide hybrid

junction

Stripline hybrid

junction

Coupling by loop

to space

Coupling by loop to guided

transmission path

Coupling by loop from coaxial to

circular waveguide, with DC

grounds connected

Dual directional coupler

Fixed-direction circulator

Reversible-direction

circulator

Mode suppressor for both

coaxial and waveguide

transmission

H

E

4

4

4

4

3 4


5/8

Diodes

Rectifier junction) diode

A

K

Zener undirectional

breakdown) diode

Bidirectional

breakdown diode

Constant-current

field-effect) diode

Tunnel diode

Tunnelrectifier

backward) diode

Schottky hot-carrier)

diode

P-i-n diode

Gunn diode, also

impatt diode

Step-recovery snap,

charge-storage) diode

Varactor variable-

capacitance) diode

Transistors

NPN transistor

Multiple-emitter

npn transistor

PNP transistor

E E E E C

B

npn Darlington

transistor

C

E

B

C

E

B

C

E

B

C

E

B

C

E

B

npn Schottky

transistor

C

E

B

Unijunction transistor

UJT) with n-type base

B2

E

B1

A

K

A

K

A

K

A

K

A

K

A

K

A

K

A

K

A

K

A

K

A

K

A

K

A K

A

K

A

K

A

K


6/8

E

B2

B1

Unijunction transistor

UJT) with p-type base

Programable unijunction transistor

PUT), also SCR with n-type base

Thyristors

Four-layer pnpn, Shockley) diode

A

K

Silicon-controlled

rectifier SCR)

Silicon-controlled

switch SCS)

Diac bidirectional switch)

T

T

Triac grated bidirectional switch)

T T

G

Field-effect

Transistors FETs)

N-channel P-channel

Junction-gate JFET)

D

S

G

D

S

G

D

S

Three-terminal depletion-type

insulated-gate IGFET)

D

S

D

S

D

S

Three-terminal depletion-

type IGFET, substrate tied

to source

S

D

S

D

Four-terminal depletion-

type IGFET

S

D

B

S

D

B

Four-terminal

enhancement-type IGFET

A

K

G

A

K

A K

G

A

K

G1

G2

S

D

B

S

G

D

B

T

T

T


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Five-terminal dual-gate

depletion-type IGFET

S

G1

D

B

2

S

G1

D

B

2

Five-terminal dual-gate

enhancement-type IGFET

Optoelectronic

diodes

Light-emitting diode LED)

Photodiode

Npn bidirectional

photodiode photo-duo-diode)

Pnp bidirectional

photodiode photo-duo-diode)

Pnp two-segment photodiode,

with common cathode

Pnp four-quadrant photodiode,

with common cathode

A

A

A

A

K

Phototransistors

Npn phototransistor,

no base connection

C

E

Npn phototransistor, with base connection

C

E

B

Optically coupled

isolators

With photodiode output

With phototransistor output,

no base connection

With phototransistor output,

and base connection

B

S

1

D

G2

D

S

1

B

2

A

K

A

K

A

A

T

T

T

T


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With photo-Darlington

output, no base


output, and base


output, and base

With NAND-gate-photo

detector output

Gate

Dual-input multiple-input

AND gate

NAND gate, negated output

NAND gate, negated input

OR gate

1

NOR gate, negated output

NOR gate, negated input

Exclusive-OR gate

1

Inverter gate

1

FLIP-FLOPS

R-S set-reset) flip-flop

Toggle-flip-flop

J-K flip-flop

D-type flip-flop

Voltage amplifier

Transcomductance

amplifier

Transresistance amplifier

VCVS

Current amplifier

Kvi

CCC

S

KIi

Ag

Ar

Ai

KIN

V

& &

&&

& &

1

1

1

1 1

R

SFF

R

SFF

Q

Q

TFF

C FFK

J

R

SFF

Q

Q

C FF

Q

Q

J

K

D

CFF

D

CLFF

Q

Q

Documents

electronics symbols.pdf