IPC 7 English version G06G-G06G 7/80

G06G-G06G00780

SECTION G – PHYSICS

G 06

COMPUTING; CALCULATING; COUNTING (score computers for games A63B 71/06, A63D 15/20, A63F 1/18; combinations of writing implements with computing devices B43K 29/08)

G 06 G

ANALOGUE COMPUTERS (analogue optical computing devices G06E 3/00; computer systems based on specific computational models G06N)

Hand-manipulated computing devices (planimeters G01B 5/26)

Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales

characterised by construction (G06G 1/10 takes precedence)

with rectilinear scales, e.g. slide rule

with circular or helical scales

characterised by the graduation

logarithmic graduations, e.g. for multiplication

in which a straight or curved line has to be drawn from given points on one or more input scales to one or more points on a result scale

in which a straight or curved line has to be drawn through related points on one or more families of curves

Devices in which the computing operation is performed mechanically (G06G 1/00 takes precedence)

for performing additions or subtractions, e.g. differential gearing

for performing multiplications or divisions, e.g. variable-ratio gearing

for evaluating functions by using cams and cam followers

for integrating or differentiating, e.g. by wheel and disc

for simulating specific processes, systems, or devices

Devices in which the computing operation is performed by means of fluid-pressure elements (such elements in general F15C)

Devices in which the computing operation is performed by varying electric or magnetic quantities (neural networks for image data processing G06T)

Details not covered by groups G06G 7/04 to G06G 7/10

Input or output devices (graph readers G06K 11/00; using function plotters, co-ordinate plotters G06K 15/22)

Programming arrangements, e.g. plugboard for interconnecting functional units of the computer; Digital programming

Power supply arrangements

Arrangements for performing computing operations, e.g. amplifiers specially adapted therefor (amplifiers in general H03F)

122

for optimisation, e.g. least square fitting, linear programming, critical path analysis, gradient method [2]

for addition or subtraction (of vector quantities G06G 7/22)

for multiplication or division

161

with pulse modulation, e.g. modulation of amplitude, width, frequency, phase, or form [2]

162

using galvano-magnetic effects, e.g. Hall effect; using similar magnetic effects [2]

163

using a variable impedance controlled by one of the input signals, variable amplification or transfer function [2]

164

using means for evaluating powers, e.g. quarter square multiplier (evaluating powers G06G 7/20) [3]

for integration or differentiation (G06G 7/19 takes precedence) [3]

182

using magnetic elements [3]

184

using capacitive elements [3]

186

using an operational amplifier comprising a capacitor or a resistor in the feedback loop [3]

188

using electromechanical elements [3]

for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions (Fourier or spectrum analysis G01R 23/16; speech analysis or synthesis G10L) [3]

195

using electro-acoustic elements [3]

for evaluating powers, roots, polynomes, mean square values, standard deviation (G06G 7/122, G06G 7/28 take precedence; gamma correction in television systems H04N 5/202, H04N 9/69) [3]

for evaluating trigonometric functions; for conversion of co-ordinates; for computations involving vector quantities (trigonometric computations using simultaneous equations G06G 7/34)

for evaluating logarithmic or exponential functions, e.g. hyperbolic functions

for discontinuous functions, e.g. backlash, dead zone, limiting, absolute value, or peak value [2]

Arbitrary function generators (using orthogonal functions, e.g. Fourier series, G06G 7/19; using curve follower G06K 11/02)

for synthesising functions by piecewise approximation

for interpolation or extrapolation (G06G 7/122 takes precedence) [2]

for solving of equations

of simultaneous equations (G06G 7/122 takes precedence) [2]

of single equations of quadratic or higher degree (G06G 7/22, G06G 7/24 take precedence)

of differential or integral equations

of partial differential equations (simulating specific devices G06G 7/48)

using electrolytic tank

using continuous medium, current-sensitive paper

using discontinuous medium, e.g. resistance network

Analogue computers for specific processes, systems, or devices, e.g. simulators [2]

for distribution networks, e.g. for fluids (G06G 7/62 takes precedence)

for economic systems; for statistics (G06G 7/122, G06G 7/19, G06G 7/20 take precedence) [3]

for nuclear physics, e.g. nuclear reactors, radioactive fallout

for heat flow (G06G 7/58 takes precedence)

for fluid flow (G06G 7/50 takes precedence)

for chemical processes (G06G 7/75 takes precedence)

for living beings, e.g. their nervous systems

for electric systems or apparatus

625

for impedance networks, e.g. determining response, determining poles or zeros, determining the Nyquist diagram (measuring impedance G01R 27/00) [2]

for power apparatus, e.g. motors, or supply distribution networks [2]

635

for determining the most economical distribution in power systems [2]

for non-electric machines, e.g. turbine

for control systems

for civil-engineering structures, e.g. beam, strut, girder

for vehicles, e.g. to determine permissible loading of ships

Flight simulators (Link trainers G09B 9/08)

for component analysis, e.g. of mixtures, of colours (G06G 7/122 takes precedence) [2]

for traffic

for direction-finding, locating, distance or velocity measuring, or navigation systems

for gun-laying; for bomb aiming; for guiding missiles [2]