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F-Term-List

2G035 Measurement of current or voltage
G01R19/00 -19/32
G01R19/00-19/32 AA AA00
PURPOSE OF CURRENT OR VOLTAGE MEASURING DEVICES 		AA01 AA02 AA03 AA04 AA05 AA06 AA07 AA08 AA09 AA10
. Reduction of errors in measurement . . Compensation for variation in characteristic values of semiconductor elements (e.g., threshold voltage) . . Temperature compensation . Signal correction . . Zero-point correction or base-line compensation . . Drift removal . Signal separation . . Noise elimination . . Detection of direct-current components of signals . . Detection of alternating current components of signals
AA11 AA12 AA13 AA14 AA15 AA16 AA17 AA18 AA19 AA20
. . Detection of specific signal components . Insulation . High-speed or wide-band measurement . . Overshooting or undershooting . Circuit protection . . Prevention of over-scaling, limiters, or voltage or current limitation . Large dynamic ranges . Improvement of input and output impedance . Multipoint input . Reduced power consumption
AA21 AA22 AA23 AA24 AA25 AA26 AA27 AA28
. Indication or recording of measured results . . Digital displays . . Indication using lights or switching off of lights . . . Indication by multiple light-emitting elements . . Flashing indication . Removal of the influence of variations in the power supply . Removal of static or electromagnetic induction . Modification or conversion of characteristics, linearization, or functional conversion
AB AB00
MEASUREMENT OF INPUT SIGNALS 		AB01 AB02 AB03 AB04 AB05 AB06 AB07 AB08 AB09 AB10
. Direct-current signals . . Direct-current power supplies . . . Batteries . Alternating-current signals or periodic signals . . Sinusoidal waves . . Sawtooth or triangular waves . . Alternating-current power supplies . . . Commercial power supplies . Noise signals . Digital or binary signals
AB11 AB12 AB13
. Single-shot pulse or impulse signals . Voice signals . Random signals
AC AC00
MEASUREMENT OF OUTPUT SIGNALS 		AC01 AC02 AC03 AC04 AC05 AC06 AC07 AC08 AC09 AC10
. Direct-current or instantaneous voltage . Direct-current or instantaneous current . Actual operational values . Mean or square mean values . Peak values . Peak location detection . Valid or invalid signal components . Sums or differences . Ratios . . Vector ratios, vector voltage, or vector current
AC11 AC12 AC13 AC14 AC15 AC16 AC17 AC18 AC19 AC20
. Rate of change . Direction or polarity . Presence of current or voltage . Comparison of two input signals . Detection of whether signals are above the required level or below the required level . . Comparison to reference signals . . . Detection of two kinds of levels . . . . Indication that signals are within a required range or are out-of-range . . . Detection of multiple levels . Selection from multiple signals
AC21 AC22 AC23 AC24 AC25
. . Selection of a maximum-value signal . . Selection of a minimum-value signal . Generated frequencies . Required amount of time to pass a given value or zero-point . Current density
AD AD00
STRUCTURAL ELEMENTS OR CIRCUITS 		AD01 AD02 AD03 AD04 AD05 AD06 AD07 AD08 AD09 AD10
. Semiconductor elements . . Transistors . . Field effect transistors (FET) . . Rectifiers or diodes (for light-emitting diodes, AD39) . . . Constant voltage . . . Protection . . . Temperature compensation . . . Zener diodes . . Programmable unijunction transistors (PUT), thyristors, or lambda elements . Resistance elements
AD11 AD12 AD13 AD14 AD15 AD16 AD17 AD18 AD19 AD20
. . Partial pressure elements . . Variable resistance elements (e.g., potentiometers) . Capacitors . . Capacitors for smoothing, filtering, and by-passing . . Capacitors for cutting of direct current (i.e., coupling capacitors) . . Capacitors for differentiation or integration . . Holding capacitors . Coils . Current transformers or transformers in general . Operational amplifiers
AD21 AD22 AD23 AD24 AD25 AD26 AD27 AD28 AD29 AD30
. Analog computing elements and non-linear transducers . . Computation of arithmetic operations, exponents, logarithms, and square roots . Comparators . Logic elements . . Latch or flip-flop elements . . Memory (e.g., read-only memory (ROM) or random access memory (RAM)) . . AND, OR, EXOR, or NOT logic elements . . Microprocessors and digital computing elements . . Counters . . Serial-parallel or parallel-serial converters and shift registers
AD31 AD32 AD33 AD34 AD35 AD36 AD37 AD38 AD39 AD40
. Differentiators . Integrators . Optical elements . . Light modulation elements . . . Magneto-optical elements . . . Electro-optical elements . . Polarizers, analyzers, and optical fibers . . Light-emitting elements and display elements . . . Light-emitting diodes (LED) . . . . Multiple light-emitting diodes (LED)
AD41 AD42 AD43 AD44 AD45 AD46 AD47 AD48 AD49 AD50
. . . Liquid crystals (i.e., electroluminescence) . . . Alphanumeric character indicators . . Light-receiving elements . Switches . . Switches for control, range switching, or signal switching . . Switches for sample holding or discharging . . Electronic switches . Sample-holding circuits . Timer circuits . Multi-vibrator circuits
AD51 AD52 AD53 AD54 AD55 AD56 AD57 AD58 AD59 AD60
. Oscillation circuits, synchronization oscillation, or crystalline elements . Timing generators . Frequency-conversion circuits . Voltage-to-current or current-to-voltage conversion circuits . Filter circuits . Constant voltage or constant-current circuits, and reference-voltage generator circuits . Direct-to-alternating current-conversion circuits . Alternating-to-direct current-conversion circuits, rectifier circuits, and absolute-value circuits . . Detector circuits . . . Phase-detection circuits or synchronizing rectifier circuits
AD61 AD62 AD63 AD64 AD65 AD66 AD67
. Delay circuits . Phase circuits . Schmidt trigger circuits or hysteresis circuits . Alarm circuits, buzzers, or speakers . Analog-to-digital conversion circuits . Magnetic circuit . Vacuum-tube circuits
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