GB1279700A - Improvements in or relating to analogue-to-digital converters - Google Patents
Improvements in or relating to analogue-to-digital convertersInfo
- Publication number
- GB1279700A GB1279700A GB6015669A GB6015669A GB1279700A GB 1279700 A GB1279700 A GB 1279700A GB 6015669 A GB6015669 A GB 6015669A GB 6015669 A GB6015669 A GB 6015669A GB 1279700 A GB1279700 A GB 1279700A
- Authority
- GB
- United Kingdom
- Prior art keywords
- datum
- input
- store
- counter
- different
- 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
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/028—Means for indicating or recording specially adapted for thermometers arrangements for numerical indication
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/50—Analogue/digital converters with intermediate conversion to time interval
- H03M1/52—Input signal integrated with linear return to datum
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
1279700 A/D converters ROSEMOUNT ENG CO Ltd 9 Dec 1970 [9 Dec 1969] 60156/69 Heading G4H In a dual ramp digital voltmeter, e.g. for measuring an analogue input 14 representing temperature, a capacitor 13 is charged by input 14 for a period determined by logic 29 and the frequency of clock pulse source 23, counter 24 is then reset to a non-zero datum by store 32, the datum corresponding to the zero level of input 14, and counter 24 is then counted up from the datum until capacitor 13 has been discharged by a reference input 10 to a reference level 21 supplied as the second input to comparator 20. Logic 29 and store 32 may comprise an AND gate and store as shown or may be pre-wired circuit boards, manually set switches or a circuit which is set to different values in sequence corresponding to different inputs being measured by data logging equipment so that different scale ranges and datum levels may be selected. Switch 36 when closed at the end of a digitizing operation holds the amplifier 12 output at a datum which is preferably different from the comparator datum 21. Store 32 may enter a negative number in counter 24 which is bidirectional.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6015669A GB1279700A (en) | 1969-12-09 | 1969-12-09 | Improvements in or relating to analogue-to-digital converters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6015669A GB1279700A (en) | 1969-12-09 | 1969-12-09 | Improvements in or relating to analogue-to-digital converters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1279700A true GB1279700A (en) | 1972-06-28 |
Family
ID=10485123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6015669A Expired GB1279700A (en) | 1969-12-09 | 1969-12-09 | Improvements in or relating to analogue-to-digital converters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1279700A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2168458A1 (en) * | 1972-01-19 | 1973-08-31 | Diatek Inc | |
GB2157515A (en) * | 1984-02-01 | 1985-10-23 | Suwa Seikosha Kk | Electronic thermometer |
EP0434824A1 (en) * | 1989-07-18 | 1991-07-03 | Horst Seperant | Integrated digital standardized precision thermometer. |
-
1969
- 1969-12-09 GB GB6015669A patent/GB1279700A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2168458A1 (en) * | 1972-01-19 | 1973-08-31 | Diatek Inc | |
GB2157515A (en) * | 1984-02-01 | 1985-10-23 | Suwa Seikosha Kk | Electronic thermometer |
EP0434824A1 (en) * | 1989-07-18 | 1991-07-03 | Horst Seperant | Integrated digital standardized precision thermometer. |
EP0434824A4 (en) * | 1989-07-18 | 1993-06-09 | Horst Seperant | Integrated digital standardized precision thermometer |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |