TW370741B - Improved slope analog-to-digital converter - Google Patents
Improved slope analog-to-digital converterInfo
- Publication number
- TW370741B TW370741B TW086117320A TW86117320A TW370741B TW 370741 B TW370741 B TW 370741B TW 086117320 A TW086117320 A TW 086117320A TW 86117320 A TW86117320 A TW 86117320A TW 370741 B TW370741 B TW 370741B
- Authority
- TW
- Taiwan
- Prior art keywords
- level
- voltage
- stored
- capacitor
- analog
- Prior art date
Links
Classifications
-
- 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
- H03M1/56—Input signal compared with linear ramp
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
Aslope analog-to-digital (A/D) converter performs a conversion of the instantaneous value of a variable analog input voltage to a digital value representative thereof by first discharging a capacitor until the level of the voltage stored therein is at least slightly below the level of analog ground, then charging the capacitor at a substantially constant rate toward a level of stored voltage that exceeds the magnitude of the anticipated highest value of the analog input voltage, and finally counting increments of time starting with the time at which the level of the voltage stored on the capacitor as a result of the charging reaches the analog ground level and ending with the time at which the level of the voltage stored on capacitor as a the result of the charging reaches the then-current level of the analog input voltage. The cumulative count constitutes a digital value that corresponds to the value of the analog input voltage at the time the count ended. After the cumulative count is obtained, the capacitor is again discharged until its stored level is at least slightly below analog ground, in preparation for the next A/D conversion. The precise level of the stored voltage remaining after discharge is not critical, but only that the former is at least slightly less than the level of analog ground.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75856896A | 1996-12-03 | 1996-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW370741B true TW370741B (en) | 1999-09-21 |
Family
ID=25052212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW086117320A TW370741B (en) | 1996-12-03 | 1997-11-20 | Improved slope analog-to-digital converter |
Country Status (2)
| Country | Link |
|---|---|
| TW (1) | TW370741B (en) |
| WO (1) | WO1998025349A1 (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6111256A (en) * | 1997-04-10 | 2000-08-29 | Shmuel Hershkovitz & Pinhas Shpater | Infrared motion detection signal sampler |
| US20020035381A1 (en) | 2000-09-18 | 2002-03-21 | Cameron Health, Inc. | Subcutaneous electrode with improved contact shape for transthoracic conduction |
| US6778860B2 (en) | 2001-11-05 | 2004-08-17 | Cameron Health, Inc. | Switched capacitor defibrillation circuit |
| US6954670B2 (en) | 2001-11-05 | 2005-10-11 | Cameron Health, Inc. | Simplified defibrillator output circuit |
| US6927721B2 (en) | 2001-11-05 | 2005-08-09 | Cameron Health, Inc. | Low power A/D converter |
| US6952610B2 (en) | 2000-09-18 | 2005-10-04 | Cameron Health, Inc. | Current waveforms for anti-tachycardia pacing for a subcutaneous implantable cardioverter- defibrillator |
| US7146212B2 (en) | 2000-09-18 | 2006-12-05 | Cameron Health, Inc. | Anti-bradycardia pacing for a subcutaneous implantable cardioverter-defibrillator |
| US6856835B2 (en) | 2000-09-18 | 2005-02-15 | Cameron Health, Inc. | Biphasic waveform for anti-tachycardia pacing for a subcutaneous implantable cardioverter-defibrillator |
| US6754528B2 (en) | 2001-11-21 | 2004-06-22 | Cameraon Health, Inc. | Apparatus and method of arrhythmia detection in a subcutaneous implantable cardioverter/defibrillator |
| US7069080B2 (en) | 2000-09-18 | 2006-06-27 | Cameron Health, Inc. | Active housing and subcutaneous electrode cardioversion/defibrillating system |
| US6865417B2 (en) | 2001-11-05 | 2005-03-08 | Cameron Health, Inc. | H-bridge with sensing circuit |
| US7751885B2 (en) | 2000-09-18 | 2010-07-06 | Cameron Health, Inc. | Bradycardia pacing in a subcutaneous device |
| US7076296B2 (en) | 2000-09-18 | 2006-07-11 | Cameron Health, Inc. | Method of supplying energy to subcutaneous cardioverter-defibrillator and pacer |
| US6721597B1 (en) | 2000-09-18 | 2004-04-13 | Cameron Health, Inc. | Subcutaneous only implantable cardioverter defibrillator and optional pacer |
| US6952608B2 (en) | 2001-11-05 | 2005-10-04 | Cameron Health, Inc. | Defibrillation pacing circuitry |
| US6834204B2 (en) | 2001-11-05 | 2004-12-21 | Cameron Health, Inc. | Method and apparatus for inducing defibrillation in a patient using a T-shock waveform |
| US7330757B2 (en) | 2001-11-21 | 2008-02-12 | Cameron Health, Inc. | Method for discriminating between ventricular and supraventricular arrhythmias |
| US7376458B2 (en) | 2004-11-29 | 2008-05-20 | Cameron Health, Inc. | Method for defining signal templates in implantable cardiac devices |
| US7655014B2 (en) | 2004-12-06 | 2010-02-02 | Cameron Health, Inc. | Apparatus and method for subcutaneous electrode insertion |
| US8160697B2 (en) | 2005-01-25 | 2012-04-17 | Cameron Health, Inc. | Method for adapting charge initiation for an implantable cardioverter-defibrillator |
| US8229563B2 (en) | 2005-01-25 | 2012-07-24 | Cameron Health, Inc. | Devices for adapting charge initiation for an implantable cardioverter-defibrillator |
| US8200341B2 (en) | 2007-02-07 | 2012-06-12 | Cameron Health, Inc. | Sensing vector selection in a cardiac stimulus device with postural assessment |
| US8788023B2 (en) | 2006-05-26 | 2014-07-22 | Cameron Health, Inc. | Systems and methods for sensing vector selection in an implantable medical device |
| US8718793B2 (en) | 2006-08-01 | 2014-05-06 | Cameron Health, Inc. | Electrode insertion tools, lead assemblies, kits and methods for placement of cardiac device electrodes |
| US7877139B2 (en) | 2006-09-22 | 2011-01-25 | Cameron Health, Inc. | Method and device for implantable cardiac stimulus device lead impedance measurement |
| US8014851B2 (en) | 2006-09-26 | 2011-09-06 | Cameron Health, Inc. | Signal analysis in implantable cardiac treatment devices |
| US7760124B2 (en) * | 2008-12-02 | 2010-07-20 | Infineon Technologies Ag | System and method for A/D conversion |
| CN105208928B (en) | 2013-03-11 | 2018-10-19 | 卡梅伦保健公司 | Implement the equipment of arrhythmia detection double standards |
| US9579065B2 (en) | 2013-03-12 | 2017-02-28 | Cameron Health Inc. | Cardiac signal vector selection with monophasic and biphasic shape consideration |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3613112A (en) * | 1969-12-11 | 1971-10-12 | Ragen Precision Ind Inc | Analog-to-digital conversion and associated circuitry |
| US4127810A (en) * | 1977-03-21 | 1978-11-28 | Ideal Industries, Inc. | Digital voltmeter |
-
1997
- 1997-11-19 WO PCT/US1997/021326 patent/WO1998025349A1/en active Application Filing
- 1997-11-20 TW TW086117320A patent/TW370741B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| WO1998025349A1 (en) | 1998-06-11 |
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