GB1101969A – Bipolar analog to digital converter
– Google Patents
GB1101969A – Bipolar analog to digital converter
– Google Patents
Bipolar analog to digital converter
Info
Publication number
GB1101969A
GB1101969A
GB39210/66A
GB3921066A
GB1101969A
GB 1101969 A
GB1101969 A
GB 1101969A
GB 39210/66 A
GB39210/66 A
GB 39210/66A
GB 3921066 A
GB3921066 A
GB 3921066A
GB 1101969 A
GB1101969 A
GB 1101969A
Authority
GB
United Kingdom
Prior art keywords
value
input
digit
negative
positive
Prior art date
1965-07-23
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
Application number
GB39210/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date 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 date listed.)
1965-07-23
Filing date
1966-09-02
Publication date
1968-02-07
1966-09-02
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1968-02-07
Publication of GB1101969A
publication
Critical
patent/GB1101969A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
G06F7/50—Adding; Subtracting
G06F7/505—Adding; Subtracting in bit-parallel fashion, i.e. having a different digit-handling circuit for each denomination
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
G06F7/02—Comparing digital values
G06F7/026—Magnitude comparison, i.e. determining the relative order of operands based on their numerical value, e.g. window comparator
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
H01H33/02—Details
H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
H03M1/00—Analogue/digital conversion; Digital/analogue conversion
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06F—ELECTRIC DIGITAL DATA PROCESSING
G06F2207/00—Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
G06F2207/38—Indexing scheme relating to groups G06F7/38 – G06F7/575
G06F2207/3804—Details
G06F2207/3808—Details concerning the type of numbers or the way they are handled
G06F2207/3832—Less usual number representations
G06F2207/384—Octal
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
H03M1/00—Analogue/digital conversion; Digital/analogue conversion
H03M1/10—Calibration or testing
H03M1/1066—Mechanical or optical alignment
Abstract
1,101,969. A/D converters. INTERNATIONAL BUSINESS MACHINES CORPORATION. 2 Sept., 1966 [7 Oct., 1965], No. 39210/66. Heading G4H. In an analogue to digital converter of the kind in which the unknown signal is quantized to obtain the highest significant digit, and reduced by the equivalent of this digit, the remainder being multiplied by the radix and the process repeated for successive digits, the converter is adapted for inputs of either polarity by means which produce a true digital representation for the highest digit, if the input is positive, and a complementary digital representation when the input is negative so that the remainder is positive for both positive and negative inputs. The input 19, Fig. 1, is first switched by 151 to positive digitizer 300 comprising nine threshold circuits having different levels (0, 1, 2, 3, 4, 5, 6, 7 and 8 volts) and negative digitizer 400 having seven threshold circuits (with negative levels 1, 2, 3, 4, 5, 6, 7 volts). The outputs are combined in comparator Or circuits 500, are temporarily stored at 600 and are recoded at 700 into three binary scale bits, an ” M ” bit, signifying that the value is negative and a ” P ” bit indicating that the input exceeds the maximum positive range of the converter. In the case of a negative value the binary digit is the 7’s complement of the input value. These bits are stored at 251 for the highest digit and at 252, 253, 254 for subsequent digits. The value stored at 251 is converted in a digital to analogue converter 201 to a voltage which is subtracted fromthe input and the difference multiplied by the radix 8 at 181. This value is then passed by switch 152 to the digitizers 300 and 400 and the process is repeated to obtain the next digit. When a binary digit is stored in any of stores 251-254 without an M or P bit the output of the DAC 201-204 is proportional to the stored digit. If an M bit is present the output is negative and has the value of the complement to 8 of the stored value. If the input is – 0À0246 volts (expressed in radix 8) the digitizer 400 produces no output and the recorder 700 produces outputs on leads 4, 2, 1 and M. This value of 7 is the complement to 7 of the value 0. When applied to the converter 201, the output produced is the complement to 8, i.e. – 1, and, when subtracted from the input value at 181, a positive difference is obtained which when multiplied by the radix 8 gives 7À532. The following digits are determined as for the positive input by successively subtracting quantized digit values and multiplying by 8 between steps. Error correcting arrangements are provided to compensate for threshold circuits in digitizers 300 and 400 which fire when they should not, or fail to fire when they should. The values stored in the stores 251- 254 and in the recoder 700 at the end of the digitizing steps are added at 800 and gated out in parallel by gates 900. The circuits are controlled by a timing circuit 100. The circuits are described in detail.
GB39210/66A
1965-07-23
1966-09-02
Bipolar analog to digital converter
Expired
GB1101969A
(en)
Applications Claiming Priority (2)
Application Number
Priority Date
Filing Date
Title
US474255A
US3460131A
(en)
1965-07-23
1965-07-23
Sequentially gated successive approximation analog to digital converter
US493798A
US3493958A
(en)
1965-07-23
1965-10-07
Bipolar analog to digital converter
Publications (1)
Publication Number
Publication Date
GB1101969A
true
GB1101969A
(en)
1968-02-07
Family
ID=27044405
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB39210/66A
Expired
GB1101969A
(en)
1965-07-23
1966-09-02
Bipolar analog to digital converter
Country Status (10)
Country
Link
US
(2)
US3460131A
(en)
JP
(1)
JPS4921451B1
(en)
AT
(1)
AT262657B
(en)
BE
(2)
BE683607A
(en)
CH
(2)
CH441433A
(en)
DE
(2)
DE1280297B
(en)
FR
(2)
FR1486291A
(en)
GB
(1)
GB1101969A
(en)
NL
(1)
NL142848B
(en)
SE
(2)
SE306099B
(en)
Families Citing this family (16)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3665456A
(en)
*
1969-07-14
1972-05-23
Alexandr Alexandrovich Bogorod
Method of and apparatus for analog-to-digital conversion of physical values and their ratios
US3710377A
(en)
*
1971-01-11
1973-01-09
Westinghouse Electric Corp
High speed an analog-to-digital converter
JPS5112390B1
(en)
*
1971-01-29
1976-04-19
US3798637A
(en)
*
1971-06-14
1974-03-19
Krone Gmbh
Pcm coder with compression characteristic
BE791057A
(en)
*
1971-11-17
1973-05-08
Cit Alcatel
RECIRCULATION ANALOGUE-DIGITAL CONVERTER
US3735392A
(en)
*
1971-12-08
1973-05-22
Bell Telephone Labor Inc
Bipolar analog-to-digital converter with double detection of the sign bit
US3806915A
(en)
*
1972-09-05
1974-04-23
Us Navy
Multithreshold analog to digital converter
IE38230B1
(en)
*
1972-09-15
1978-01-18
Ind Des Telecommunications Com
Improvements in digital coders
US3956746A
(en)
*
1975-01-07
1976-05-11
Westinghouse Electric Corporation
Successively ranged A/D converter with error correction
JPS5494652U
(en)
*
1977-12-17
1979-07-04
US4204198A
(en)
*
1977-12-20
1980-05-20
The United States Of America As Represented By The Secretary Of The Army
Radar analog to digital converter
US4308524A
(en)
*
1979-06-05
1981-12-29
Harrison Systems, Inc.
Fast high resolution predictive analog-to-digital converter with error correction
US4620179A
(en)
*
1983-08-29
1986-10-28
Harris Corporation
Method for successive approximation A/D conversion
US4639715A
(en)
*
1984-02-13
1987-01-27
Intersil, Inc.
Flash analog to digital converter
US4804960A
(en)
*
1987-10-08
1989-02-14
Analog Deivces, Incorporated
Sub-ranging A/D converter with improved error correction
US10848166B1
(en)
2019-12-06
2020-11-24
Analog Devices International Unlimited Company
Dual mode data converter
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3119105A
(en)
*
1959-05-20
1964-01-21
Ibm
Analog to digital converter
US3221324A
(en)
*
1960-10-26
1965-11-30
Ibm
Analog to digital converter
US3157873A
(en)
*
1962-02-21
1964-11-17
Gen Precision Inc
Voltage-to-digital converter
1965
1965-07-23
US
US474255A
patent/US3460131A/en
not_active
Expired – Lifetime
1965-10-07
US
US493798A
patent/US3493958A/en
not_active
Expired – Lifetime
1966
1966-07-04
BE
BE683607D
patent/BE683607A/xx
unknown
1966-07-05
FR
FR7943A
patent/FR1486291A/en
not_active
Expired
1966-07-13
AT
AT674366A
patent/AT262657B/en
active
1966-07-13
DE
DEJ31307A
patent/DE1280297B/en
not_active
Withdrawn
1966-07-15
NL
NL666609951A
patent/NL142848B/en
unknown
1966-07-21
SE
SE10001/66A
patent/SE306099B/xx
unknown
1966-07-21
CH
CH1056066A
patent/CH441433A/en
unknown
1966-08-27
JP
JP41056120A
patent/JPS4921451B1/ja
active
Pending
1966-09-02
GB
GB39210/66A
patent/GB1101969A/en
not_active
Expired
1966-09-12
FR
FR8024A
patent/FR1492716A/en
not_active
Expired
1966-09-21
BE
BE687176D
patent/BE687176A/xx
unknown
1966-09-29
DE
DEJ31875A
patent/DE1274179B/en
not_active
Withdrawn
1966-10-07
SE
SE13588/66A
patent/SE333751B/xx
unknown
1966-10-07
CH
CH1450566A
patent/CH452595A/en
unknown
Also Published As
Publication number
Publication date
CH441433A
(en)
1967-08-15
DE1280297B
(en)
1968-10-17
US3493958A
(en)
1970-02-03
FR1486291A
(en)
1967-06-23
NL6609951A
(en)
1967-01-24
AT262657B
(en)
1968-06-25
FR1492716A
(en)
1967-08-18
SE306099B
(en)
1968-11-18
SE333751B
(en)
1971-03-29
DE1274179B
(en)
1968-08-01
CH452595A
(en)
1968-03-15
BE687176A
(en)
1967-03-01
NL142848B
(en)
1974-07-15
US3460131A
(en)
1969-08-05
JPS4921451B1
(en)
1974-06-01
BE683607A
(en)
1966-12-16
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