What is impedance and what does impedance mean?

In a circuit with resistors, inductors and capacitors, the resistance to alternating current is called impedance. Impedance is usually represented by Z. Impedance consists of resistance, inductance and capacitance, but it is not a simple addition of the three. If the three are connected in series, and the frequency f of the alternating current, the resistor R, the inductor L and the capacitor C are known, then the impedance of the series circuit The unit of impedance is ohm. For a specific circuit, the impedance is not constant, but changes with the frequency. In a circuit with resistors, inductors and capacitors in series, the impedance of the circuit is generally greater than the resistance. That is, the impedance is reduced to the minimum value. In a circuit with inductors and capacitors in parallel, the impedance increases to the maximum value when resonating, which is the opposite of the series circuit. impedance information: acoustic(al) impedance acoustic driving-point impedance acoustic input impedance acoustic wave impedance aerial impedance alternating current impedance anode - load impedance antenna characteristic impedance antenna feed impedance antenna input impedance antenna load impedance antenna mutual impedance antenna output impedance antenna self-radiation impedance backward impedance balance-to-ground input impedance balanced impedance base impedance beam loading impedance biasing impedance bilateral impedance blocked impedance breakdown impedance bridged impedance capacitive impedance cathode coating impedance cathode interface impedance cathode interlayer impedance cavity impedance characteristic wave impedance characteristic wave impedancecircuit impedancecoil impedancecollector - base impedancecombined impedancecommon impedancecomplex impedancecomputing impedanceconcentrated impedancecondenser impedanceconjugate impedancecontrol impedancecontrollable impedancecoupled impedancecrystal impedance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​




























































































current limiting impedance
cyclic impedance
damped
impedance
diaphragm impedance
diode forward impedance direct - axis subtransient impedance dissymmetrical impedance distribution impedance down lead impedance driving point impedance dynamic plate impedance earth impedance effective impedance electric impedance electrode impedance equivalent impedance excitation impedance external impedance external plate impedance feedback impedance feedpoint impedance free motional impedance free-space impedance gate impedance generalized impedance generator impedance grid input impedance guide characteristic wave impedance guide wave impedance helix impedance

high input impedancehybrid
equivalent
impedanceimage impedanceimage - frequency impedanceimpulsive impedanceinductive impedanceinput acoustic impedanceiterative impedanceinternal output impedanceintrinsic impedanceinverse impedancelayer impedancelead impedanceleakage impedanceline characteristic impedancelinear impedanceload impedanceloop impedancelumped impedancematched impedancemechanical impedancemechanical rotational impedancemedium impedancemesh impedancemicrophone impedancemid - series
image impedancemotional impedancemutual radiation impedancenatural impedancenatural acoustic impedancenegative sequence impedancenetwork input impedanceneuromuscular impedanceno - load ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ impedance no-load impedance nominal characteristic impedance nominal earphone impedance non -linear impedance non - reactive impedance normal impedance open circuit driving-point impedance open -circuit impedance open-circuit transfer impedance open-loop output impedance optimal impedance output impedance parallel resonance impedance passive impedance phase -shifting impedance plate impedance





























































































plate - load
impedancepositive
impedancepositive
-
phase sequence
impedancequadrature
-
axis synchronous
impedanceradiation
impedancerated
impedancereaction
impedancereceiving - end
impedancereciprocal impedancereciprocating impedancereduced impedancereflected impedanceregenerative impedanceresonance impedanceresonant circuit impedanceresultant impedancereverse transfer impedancerotational impedanceself - biasing impedanceself - radiation impedancesending - end impedanceseries impedanceshielding
impedanceshort - circuit input impedanceshunt negative impedancesingle - ended input impedancesource impedance impedancespeaker impedancespecific impedancespecific acoustic ( al ) impedancespecific normal acoustic impedancespeech impedance spurious impedance static impedance stator impedance surface impedance surge impedance symmetric impedance synchronous impedance terminal impedance time -variable impedance total impedance transfer impedance transistor input impedance transistor transfer impedance

Transistor transfer impedance
transmission-line impedance
transmission-line impedance
tuned
impedance
unilateral impedance
unit
area impedance
unit
area acoustic impedance unit area acoustic
impedance vacuum
tube impedance valve input impedance variable load impedance vector impedance vector impedance, complex impedance virtual impedance effective impedance wall impedance wave impedance waveguide impedance zero -phase sequence impedance Other language introductions