GB898779A - Improvements relating to function generators for digital computing engines - Google Patents
Improvements relating to function generators for digital computing enginesInfo
- Publication number
- GB898779A GB898779A GB2795358A GB2795358A GB898779A GB 898779 A GB898779 A GB 898779A GB 2795358 A GB2795358 A GB 2795358A GB 2795358 A GB2795358 A GB 2795358A GB 898779 A GB898779 A GB 898779A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gradient
- store
- value
- values
- gated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/07—Programme control other than numerical control, i.e. in sequence controllers or logic controllers where the programme is defined in the fixed connection of electrical elements, e.g. potentiometers, counters, transistors
- G05B19/075—Programme control other than numerical control, i.e. in sequence controllers or logic controllers where the programme is defined in the fixed connection of electrical elements, e.g. potentiometers, counters, transistors for delivering a step function, a slope or a continuous function
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/03—Digital function generators working, at least partly, by table look-up
- G06F1/035—Reduction of table size
- G06F1/0356—Reduction of table size by using two or more smaller tables, e.g. addressed by parts of the argument
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/17—Function evaluation by approximation methods, e.g. inter- or extrapolation, smoothing, least mean square method
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
- G06F7/64—Digital differential analysers, i.e. computing devices for differentiation, integration or solving differential or integral equations, using pulses representing increments; Other incremental computing devices for solving difference equations
- G06F7/66—Digital differential analysers, i.e. computing devices for differentiation, integration or solving differential or integral equations, using pulses representing increments; Other incremental computing devices for solving difference equations wherein pulses represent unitary increments only
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- General Engineering & Computer Science (AREA)
- Data Mining & Analysis (AREA)
- Algebra (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- Computing Systems (AREA)
- Automation & Control Theory (AREA)
- Complex Calculations (AREA)
Abstract
898,779. Function generators. ROE & CO. Ltd., A. V. Aug. 24, 1959 [Sept. 1, 1958], No. 27953/58. Class 106 (1). A digital arbitrary function generator, preferably for use with the digital integrator described in Specification 886,382 comprises a store a containing the gradients of straight lines approximating to the arbitrary function, a store b containing values of the variable at which a change from one gradient to another is required, and a control means l which causes a change of gradient at the output when the value of the variable reaches one of the values in the store b. Corresponding positions of the stores hold the gradient and the difference between the values of x between which the gradient lies. An appropriate difference value is gated to a register j. Incoming increments dx decrease this value until it reaches zero when a different gradient is selected, and a new value gated to j. If a dx decrement occurs the difference value in the currently selected section of store b is subtracted from the contents of j and subsequent decrements increase the quantity held in j.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2795358A GB898779A (en) | 1958-09-01 | 1958-09-01 | Improvements relating to function generators for digital computing engines |
FR804008A FR1235782A (en) | 1958-09-01 | 1959-09-01 | Function generator for digital calculators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2795358A GB898779A (en) | 1958-09-01 | 1958-09-01 | Improvements relating to function generators for digital computing engines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB898779A true GB898779A (en) | 1962-06-14 |
Family
ID=10267934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2795358A Expired GB898779A (en) | 1958-09-01 | 1958-09-01 | Improvements relating to function generators for digital computing engines |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1235782A (en) |
GB (1) | GB898779A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0462381A2 (en) * | 1990-04-26 | 1991-12-27 | Sanyo Electric Co., Ltd. | Method and apparatus for processing audio signal |
EP0562715A2 (en) * | 1992-03-27 | 1993-09-29 | Sony United Kingdom Limited | Video signal generator with a low clock rate |
-
1958
- 1958-09-01 GB GB2795358A patent/GB898779A/en not_active Expired
-
1959
- 1959-09-01 FR FR804008A patent/FR1235782A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0462381A2 (en) * | 1990-04-26 | 1991-12-27 | Sanyo Electric Co., Ltd. | Method and apparatus for processing audio signal |
EP0462381B1 (en) * | 1990-04-26 | 1997-06-25 | Sanyo Electric Co., Ltd. | Method and apparatus for processing audio signal |
EP0562715A2 (en) * | 1992-03-27 | 1993-09-29 | Sony United Kingdom Limited | Video signal generator with a low clock rate |
EP0562715A3 (en) * | 1992-03-27 | 1994-01-19 | Sony Uk Ltd |
Also Published As
Publication number | Publication date |
---|---|
FR1235782A (en) | 1960-07-08 |
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