Electronic symbols _Ký hiệu điện tử

Resistors Fixed-value resistor Variable resistor Sources Constantvoltage source Batteries Single-cell battery + − + − Constantcurrent source Multiple-cell battery + − Circuit protectors Fus e Circuit breaker Voltagesensitive resistor (varistor) Capacitors Fixed-value capacitor Electrolytic capacitor Variable capacitor Ground Earth ground Chassis or frame connection AC oscillator source Crystals Piezoelectric crystal Isolated Lamps Incandescent lamp Signal lamp Inductors Fixed-value inductors Fixed-value inductors With magnetic core variable inductors Differential amplifier (or comparator) + Transformer (air core) − Norton (current) amplifier − + Waveguide Flashing signal lamp Transformers Circular Transformer (iron core) Audio devices waveguide Neon lamp, DC type Loudspeak er Rectangular waveguide Transformer (ferrite core) Microphone Neon lamp, AC type Fluorescent lamp Two-terminal Amplifiers Single-ended amplifier Flexible waveguide Twisted waveguide Shielded transformer Cable Two-conductor cable with grounded shield Contacts Fixed relay contact Fixed switch contact Coaxial cable with grounded shield P Closed contact Monostable multivibrat Monostable(single-shot,oneor shot) Open contact Unbalanced stripline Unbalanced stripline Make-beforebreak contact assembly Single-pole double-throw (spdt) Double-pole double-throw (dpdt) SS Phase shifters Matched phase shifter φ Stripline Switche s Single-pole single-throw (spst) Moving contact, locking Moving contact, nonlocking Twisted pair Break-beforemake contact assembly Schmitt trigger General Push-button switch, normally open Push-button switch, normally closed Multiposition switch Relays Bandpass filter Stripline hybrid junction From A, spst normally open (make) From B, spst normally closed (make) From C, spst (break, make) λ λ Dual directional coupler λ 3λ Low-pass filter Coupling by λ loop to space High-pass filter Band-reject filter Coupling by loop to guided transmission path From D, spst (break, make) Filters Mode filter Microwav e circuits Waveguide hybrid junction H E Fixed-direction circulator Reversibledirection circulator Coupling by loop from coaxial to circular waveguide, with DC grounds connected Mode suppressor for both coaxial and waveguide transmission Diodes Rectifier (junction) diode K A A K A B K Zener (undirectional breakdown) K A diode A K A K Bidirectional breakdown diode A Tunnelrectifier (backward) diode K A Multipleemitter E E E npn E transistor C Varactor (variablecapacitance) A diode Schottky (hotcarrier) diode A B K E K A A K A K npn Schottky C transistor Transistors Constantcurrent (fieldeffect) diode K A Tunnel diode A K C K P-i-n diode K npn Darlington transistor Gunn diode, also impatt diode K A Steprecovery(snap, charge-storage) diode A K NPN transistor E C B B C Unijunction transistor (UJT) with n-type base E B2 B E E PNP transistor C C B B E E B1 Unijunction transistor (UJT) with p-type base E Siliconcontrolled rectifier(SCR) B2 A B1 Programable unijunction transistor (PUT), also SCR with n-type base A K G T K Siliconcontrolled switch(SCS) A G Triac(grated bidirectional switch) G D G G S D S Four-layer (pnpn, Shockley) diode Diac(bidirectional switch) A T T T K T S D G S Four-terminal depletion-type IGFET G T S (JFET) Thyristors K G D NPchannel Junction-gate channel K S Three-terminal depletion-type IGFET, substrate tied to source G G D D G T Field-effect Transistors(FETs) G A Three-terminal depletion-type insulated-gate (IGFET) T D G S D G S D B G S Four-terminal enhancement-type IGFET G D B G S D B S D B S Five-terminal dualgate depletion-type IGFET D G2 G1 G2 G1 B S Npn bidirectional photodiode(photo-duodiode) D B S T T Pnp bidirectional photodiode(photo-duodiode) Five-terminal dualgate enhancementtype IGFET G2 G1 D B S G2 G1 D B S Optoelectronic diodes Light-emitting diode(LED) A Photodiode A Pnp two-segment photodiode, with common cathode Pnp four-quadrant photodiode, with common cathode A A B E Optically coupled isolators With photodiode output With phototransistor output, no base connection A A Phototransistor Npn s phototransistor, no base C connection K C A A K K T T Npn phototransistor, with base connection E With phototransistor output, and base connection With photoDarlington output, no base Dual-input input AND gate multiple- & & With photoDarlington output, and base NAND gate, negated output & With photoDarlington output, and base & ≥1 D-type flipflop D C ≥1 Exclusive-OR gate =1 Inverter gate Transcomductan ce amplifier + − ≥1 R-S (set-reset) flipflop R OR gate S ≥1 NOR gate, negated output Toggle-flipflop T R FF FF S − FF Q Q Current amplifier + − R S FF Ai Q Q + − Kvi Gate ≥1 J C FF K VCV S KVIN J-K flip-flop ≥1 Ag Transresistance amplifier + Ar FLIP-FLOPS & Q FF CL Q D FF Voltage amplifier NAND gate, negated input & With NAND-gatephoto detector output NOR gate, negated input J Q C FF K Q KI i CCC S ... photodiode(photo-duodiode) Five-terminal dualgate enhancementtype IGFET G2 G1 D B S G2 G1 D B S Optoelectronic diodes Light-emitting diode(LED) A Photodiode A Pnp two-segment photodiode, with common