GB1453450A - Low power electronic calculator system - Google Patents
Low power electronic calculator systemInfo
- Publication number
- GB1453450A GB1453450A GB5804473A GB5804473A GB1453450A GB 1453450 A GB1453450 A GB 1453450A GB 5804473 A GB5804473 A GB 5804473A GB 5804473 A GB5804473 A GB 5804473A GB 1453450 A GB1453450 A GB 1453450A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lines
- line
- bits
- register
- address
- 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
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
- G11C17/08—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using semiconductor devices, e.g. bipolar elements
- G11C17/10—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using semiconductor devices, e.g. bipolar elements in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM
- G11C17/12—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using semiconductor devices, e.g. bipolar elements in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM using field-effect devices
- G11C17/126—Virtual ground arrays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/31721—Power aspects, e.g. power supplies for test circuits, power saving during test
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/3181—Functional testing
- G01R31/319—Tester hardware, i.e. output processing circuits
- G01R31/31917—Stimuli generation or application of test patterns to the device under test [DUT]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
- G06F15/0216—Constructional details or arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computing Systems (AREA)
- Computer Hardware Design (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Digital Computer Display Output (AREA)
- Calculators And Similar Devices (AREA)
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
1453450 An integrated circuit electronic calculator TEXAS INSTRUMENTS Inc 14 Dec 1973 [24 Sept 1973 (6)] 58044/73 Heading G4A An integrated circuit electronic calculator includes a read-only memory, the cells of which are arranged in rows (defined by X lines in the form of conductive strips) and columns (defined by Y lines in the form of elongated regions) on a semi-conductor chip, groups of the Y lines each having a group output line and a single ground line. In response to an address, a X select decoder energizes one of the X lines and a Y select decoder connects one of the Y lines in each group to the ground line and an adjacent Y line to the output line of the group. As described the calculator is pocket size and battery powered having a moulded plastic casing with decimal keys, function keys for the rules of arithmetic and a segmented light emitter diode, discharge panel or fluorescent type of display, the main electronic system being implemented on a single MOS/LSI chip containing about 5,000 transistors in a standard 28 pin package. It incorporates an on-chip oscillator and clock generator and test circuitry. Semi-conductor chip (Fig. 2).-This includes 3 working registers A, B, C (contents of register A being displayed) and two 11 bit flag registers 26, 27 in a memory 20 sequentially addressed by a state counter 21, an arithmetic unit 22 including a bit parallel digit serial adder, carry/ borrow circuit and BCD corrector and the readonly memory unit 30 containing 320 11 bit instruction words read into a register 31. System timing.-Each instruction time (D time) is divided into 11 state times S 0 -S 10 in each of which 4 phase displaced signals # 1 -# 4 are derived from a basic clock. The state times which correspond to the number of digits in a word are derived from the # 1 -# 4 clock in counter 21. Data is always read from memory 20 at #1 and written at #3. The digit times are used for keyboard and display span, there being 10 digit times D 1 -D 10 . Display.-Data from register A is coded into segment signals on 7 lines (SA-SG, Fig. 4A, not shown) with decimal point information on a further line (SP), the segment signal being fed to cathodes (A-G) in a light emitter diode unit or a gas discharge panel. The scanning signals (D1-D9) are connected to anodes (50) which comprise transparent metal film covering the cathodes in the discharge panel or anodes common to all digit segments in a light emitter diode display. Instruction set.-If class bits I 10 , I 9 of instruction word I 0 -I 10 are 00 or 01, the remaining 8 bits represent an address. For register instructions the class bits are 1, 1, bits I 4 -I 8 represent an OP code and bits I 0 -I 3 represent a mask field. If bits I 10 -I 7 are 1000 or 1001 bits I 0 -I 8 represent a jump address. If bits I 8 -I 10 are 101 a flag instruction is represented by bits I 4 -I 7 and a mask by bits I 0 -I 4 . Read only memory (Figs. 6R, 6S, 6T, 6U).- The memory comprises 3,520 memory cells 300 defined by the presence or absence of a gate or thin oxide at a X, Y intersection, X lines 301 being metallization strips and Y lines being P diffusions. One ground line 303 and one group line 304 are provided for each group of five Y lines 302, there being 11 such groups. Each 3 bit Y address is decoded by decoder 39 to select one of the five Y lines in each of the groups. Each 6 bit X address is used to select one of 64 X lines. At each digit time just prior to S3# 4 all lines 314 from the X decoder 36 are charged to "0" or V GG , all lines 312 from the X address register 36 are at "1" or V SS , all the X lines 301 are at "1" or V SS and all the Y lines 302 are at 0 or V DD . At S3# 4 line 316 goes to 1 or V SS to isolate lines 314 from V GG , lines 312 are from V SS , and lines 302 from V DD . At S4# 1 the X and Y addresses are applied to lines 312, 307 so that all except one line 304 are connected to V SS , the selected one remaining charged to V GG so that the gate of the associated selected device is at 0 or V GG and in each group of Y lines 302 all except one discharges, the remaining one being at V DD . At S4# 2 line 320 goes to V GG so that the line 302 associated with the selected device 321 goes to V GG or zero. This turns on the gates 300 in each of the 11 sections for the selected X line to provide an 11 bit output signal on line 304 for loading into the instruction register 31, which comprises an 11 stage shift register, I 0 -I 10 , stages I 1 -I 5 providing the next X address to input A1-A5 of the X register 36 and stages I 6 -I 8 providing inputs A6-A8 of the Y address register 37 when a JUMP signal occurs on line 335.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US400299A US3921142A (en) | 1973-09-24 | 1973-09-24 | Electronic calculator chip having test input and output |
US05/400,472 US3946216A (en) | 1973-09-24 | 1973-09-24 | Electronic calculator system having serial transfer of instruction word fields to decode arrays |
US400473A US3892957A (en) | 1973-09-24 | 1973-09-24 | Digit mask logic combined with sequentially addressed memory in electronic calculator chip |
US05/400,438 US3932846A (en) | 1973-09-24 | 1973-09-24 | Electronic calculator having internal means for turning off display |
US05/400,437 US3987416A (en) | 1973-09-24 | 1973-09-24 | Electronic calculator with display and keyboard scanning signal generator in data memory |
US05/400,471 US3934233A (en) | 1973-09-24 | 1973-09-24 | Read-only-memory for electronic calculator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1453450A true GB1453450A (en) | 1976-10-20 |
Family
ID=27559929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5804473A Expired GB1453450A (en) | 1973-09-24 | 1973-12-14 | Low power electronic calculator system |
Country Status (15)
Country | Link |
---|---|
JP (1) | JPS5642014B2 (en) |
AU (1) | AU6352673A (en) |
BE (1) | BE809261A (en) |
DD (1) | DD113273A5 (en) |
DE (1) | DE2362237A1 (en) |
DK (1) | DK664473A (en) |
FR (1) | FR2271751A5 (en) |
GB (1) | GB1453450A (en) |
HU (1) | HU171690B (en) |
IL (1) | IL43894A0 (en) |
IN (1) | IN140464B (en) |
IT (1) | IT1008634B (en) |
NL (1) | NL7317478A (en) |
NO (1) | NO480473L (en) |
SE (1) | SE7317582L (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5173856A (en) * | 1974-11-19 | 1976-06-26 | Texas Instruments Inc | Hyojisochito kiiboodo no sosashutsuryokunikanshi tasunokoodokumiawaseojusuru denshikeisanki aruiha deijitarushorikichitsupu |
JPS5824216Y2 (en) * | 1979-01-05 | 1983-05-24 | カルソニックカンセイ株式会社 | Fingertip adjustment device for crossed coil type instruments |
JPS5890258A (en) * | 1981-11-24 | 1983-05-28 | Seiko Epson Corp | Integrated circuit for electronic calculator |
JPS58147207A (en) * | 1982-02-26 | 1983-09-02 | Pioneer Electronic Corp | Power supply circuit of amplifier |
JPS59183015U (en) * | 1983-05-24 | 1984-12-06 | 東亜特殊電機株式会社 | amplifier |
JPS61180331A (en) * | 1985-10-04 | 1986-08-13 | Nec Corp | Integrated circuit device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1131085A (en) * | 1966-03-25 | 1968-10-23 | Secr Defence | Improvements in or relating to the testing and repair of electronic digital computers |
DE2206110A1 (en) * | 1972-02-09 | 1973-08-16 | Heberlein & Co Ag | PROCEDURE FOR THE POWER-SAVING OPERATION OF PORTABLE DIGITAL MEASURING DEVICES |
US3922526A (en) * | 1973-02-02 | 1975-11-25 | Texas Instruments Inc | Driver means for lsi calculator to reduce power consumption |
US3938138A (en) * | 1973-06-19 | 1976-02-10 | Sony Corporation | Time switching power saver system for electronic indicators |
-
1973
- 1973-12-07 DK DK664473A patent/DK664473A/da unknown
- 1973-12-12 AU AU63526/73A patent/AU6352673A/en not_active Expired
- 1973-12-14 GB GB5804473A patent/GB1453450A/en not_active Expired
- 1973-12-14 FR FR7344951A patent/FR2271751A5/fr not_active Expired
- 1973-12-14 DE DE2362237A patent/DE2362237A1/en active Pending
- 1973-12-17 NO NO4804/73A patent/NO480473L/no unknown
- 1973-12-19 IN IN2759/CAL/73A patent/IN140464B/en unknown
- 1973-12-20 JP JP14296973A patent/JPS5642014B2/ja not_active Expired
- 1973-12-20 NL NL7317478A patent/NL7317478A/en not_active Application Discontinuation
- 1973-12-21 DD DD175608A patent/DD113273A5/xx unknown
- 1973-12-23 IL IL43894A patent/IL43894A0/en unknown
- 1973-12-27 HU HU73TE00000766A patent/HU171690B/en unknown
- 1973-12-28 BE BE139402A patent/BE809261A/en unknown
- 1973-12-28 IT IT54666/73A patent/IT1008634B/en active
- 1973-12-28 SE SE7317582A patent/SE7317582L/en unknown
Also Published As
Publication number | Publication date |
---|---|
NL7317478A (en) | 1975-03-26 |
IL43894A0 (en) | 1974-03-14 |
JPS5061161A (en) | 1975-05-26 |
HU171690B (en) | 1978-02-28 |
IN140464B (en) | 1976-11-13 |
DK664473A (en) | 1975-05-12 |
JPS5642014B2 (en) | 1981-10-01 |
SE7317582L (en) | 1975-03-25 |
BE809261A (en) | 1974-04-16 |
IT1008634B (en) | 1976-11-30 |
FR2271751A5 (en) | 1975-12-12 |
DD113273A5 (en) | 1975-05-20 |
AU6352673A (en) | 1975-06-12 |
DE2362237A1 (en) | 1975-03-27 |
NO480473L (en) | 1975-04-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19931213 |