WO1999013574A1 - Low power current-to-frequency converter circuit for use in implantable sensors - Google Patents
Low power current-to-frequency converter circuit for use in implantable sensors Download PDFInfo
- Publication number
- WO1999013574A1 WO1999013574A1 PCT/US1998/018978 US9818978W WO9913574A1 WO 1999013574 A1 WO1999013574 A1 WO 1999013574A1 US 9818978 W US9818978 W US 9818978W WO 9913574 A1 WO9913574 A1 WO 9913574A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- capacitor
- signal
- charge
- frequency
- vco
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 104
- 239000000126 substance Substances 0.000 claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 21
- 239000000758 substrate Substances 0.000 description 13
- 230000002051 biphasic effect Effects 0.000 description 8
- 210000001519 tissue Anatomy 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 5
- 239000008103 glucose Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/06—Frequency or rate modulation, i.e. PFM or PRM
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/378—Electrical supply
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000511247A JP3958933B2 (en) | 1997-09-12 | 1998-09-11 | Low power current / frequency conversion circuit used for sensors that can be embedded |
EP98946040A EP1012974B1 (en) | 1997-09-12 | 1998-09-11 | Low power current-to-frequency converter circuit for use in implantable sensors |
AU93146/98A AU9314698A (en) | 1997-09-12 | 1998-09-11 | Low power current-to-frequency converter circuit for use in implantable sensors |
DE69819533T DE69819533T2 (en) | 1997-09-12 | 1998-09-11 | CURRENT FREQUENCY TRANSFORMER AND ITS USE IN IMPLANTABLE SENSORS |
CA002303022A CA2303022C (en) | 1997-09-12 | 1998-09-11 | Low power current-to-frequency converter circuit for use in implantable sensors |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/928,868 US5917346A (en) | 1997-09-12 | 1997-09-12 | Low power current to frequency converter circuit for use in implantable sensors |
US08/928,868 | 1997-09-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999013574A1 true WO1999013574A1 (en) | 1999-03-18 |
Family
ID=25456908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/018978 WO1999013574A1 (en) | 1997-09-12 | 1998-09-11 | Low power current-to-frequency converter circuit for use in implantable sensors |
Country Status (7)
Country | Link |
---|---|
US (1) | US5917346A (en) |
EP (1) | EP1012974B1 (en) |
JP (1) | JP3958933B2 (en) |
AU (1) | AU9314698A (en) |
CA (1) | CA2303022C (en) |
DE (1) | DE69819533T2 (en) |
WO (1) | WO1999013574A1 (en) |
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EP1012974B1 (en) | 2003-11-05 |
DE69819533D1 (en) | 2003-12-11 |
CA2303022C (en) | 2006-01-24 |
US5917346A (en) | 1999-06-29 |
CA2303022A1 (en) | 1999-03-18 |
JP3958933B2 (en) | 2007-08-15 |
EP1012974A1 (en) | 2000-06-28 |
AU9314698A (en) | 1999-03-29 |
JP2001516980A (en) | 2001-10-02 |
DE69819533T2 (en) | 2004-09-30 |
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