The Illustrated Dictionary of Electronics - Loscha

statement • statics 655statement The contents of a line in a sourcelanguagecomputer program.state of charge The amount of charge, measuredin coulombs or ampere hours, in a storage cell orbattery at a given time. A measure of the availableremaining energy in the cell or battery.statfarad The cgs electrostatic unit of capacitance;1 statfarad = 1.112650 × 10 -12 farad.stathenry The cgs electrostatic unit of inductance;1 stathenry = 8.987554 × 10 11 henry.static 1. Pertaining to that which is constant inquantity (e.g., static collector current of a transistor).2. Pertaining to that which is at rest (e.g.,static electricity). 3. The radio noise (sferics) producedby electric discharges in the atmosphere,usually lightning. 4. Pertaining to a test-andmeasurementmode for a unit or device, withoutsubjecting the unit or device to regular operation.Compare DYNAMIC.static base current See DC BASE CURRENT.static base resistance See DC BASE RESIS-TANCE.static base voltage See DC BASE VOLTAGE.static cathode current See DC CATHODE CUR-RENT.static cathode resistance See DC CATHODE RE-SISTANCE.static cathode voltage See DC CATHODE VOL-TAGE.static characteristic An operating characteristicdetermined from constant, rather than alternatingor fluctuating, values of independent and dependentvariables. Examples: the direct-current(dc) characteristics of diodes, transistors, and integratedcircuits. Compare DYNAMIC CHARAC-TERISTIC.static charge Energy stored in a stationary electricfield; electricity at rest.static collector A device that grounds the rotatingwheels of a motor vehicle, thereby removing thestatic electricity generated by the friction of thetires on the roadway.static collector current See DC COLLECTORCURRENT.static collector resistance See DC COLLECTORRESISTANCE.static collector voltage See DC COLLECTORVOLTAGE.static convergence In a color-television picturetube, the convergence of the three undeflectedelectron beams at the center of the aperturemask.static device A device with no moving parts.static discharge resistor A fixed resistor connectedbetween the earth and the high side of thepower line in a television receiver to drain off atmosphericelectric charge.static drain current See DC DRAIN CURRENT.static drain resistance See DC DRAIN RESIS-TANCE.static drain voltage See DC DRAIN VOLTAGE.static dump In computer operations, a dump occurringat a predetermined point in a programrun or at the end of the run.static electricity Energy in the form of a stationaryelectric charge, such as that stored in capacitorsor produced by friction or induction.static emitter current See DC EMITTER CUR-RENT.static emitter resistance See DC EMITTER RE-SISTANCE.static emitter voltage See DC EMITTER VOLTAGE.static flip-flop A flip-flop (see BISTABLE MULTIVI-BRATOR) using direct-current operating voltages.A single pulse switches the unit from on to off,and vice versa. Compare DYNAMIC FLIP-FLOP.static forward current transfer ratio Symbol,H FE . An expression of gain in a bipolar transistor.It can range from a factor of just a few times up tohundreds of times. Mathematically,H FE = I C /I Bwhere I C is the collector current and I B is the basecurrent. The H FE rating is important because itgives engineers an indication of the greatest currentamplification that can be obtained with aparticular transistor.static frequency multiplier A magnetic-core device,similar to a magnetic amplifier or peakingtransformer, that provides harmonics by distortinga sine-wave signal.static gate current See DC GATE CURRENT.static gate resistance See DC GATE RESISTANCE.static gate voltage See DC GATE VOLTAGE.static grid current See DC GRID CURRENT.static grid voltage See DC GRID VOLTAGE.static hysteresis The condition in which the magnetizationof a material (when it has the same intensityas the magnetizing force) is different whenthe force is increasing than when the force is decreasing,regardless of the time lag. CompareVISCOUS HYSTERESIS.static induction See ELECTROSTATIC INDUC-TION.static machine See ELECTROSTATIC GENERA-TOR.static memory Also called nonvolatile memory. Ina computer, a data memory medium (such asprogrammable read-only memory, or PROM) inwhich information is stored until it is altered orerased. It does not require a source of power tomaintain the integrity of the data. CompareVOLATILE MEMORY.static mutual conductance See STATIC TRANS-CONDUCTANCE.static plate current See DC PLATE CURRENT.static plate resistance See DC PLATE RESIS-TANCE.static plate voltage See DC PLATE VOLTAGE.statics The study of forces, bodies, poles, charges,or fields at rest or in equilibrium. CompareDYNAMICS.