CA1123225A - Compensated capacitive transducer demodulator circuit - Google Patents
Compensated capacitive transducer demodulator circuitInfo
- Publication number
- CA1123225A CA1123225A CA319,755A CA319755A CA1123225A CA 1123225 A CA1123225 A CA 1123225A CA 319755 A CA319755 A CA 319755A CA 1123225 A CA1123225 A CA 1123225A
- Authority
- CA
- Canada
- Prior art keywords
- demodulator
- voltage
- transducer
- capacitive transducer
- carrier
- 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
- 229940000425 combination drug Drugs 0.000 claims abstract description 20
- 239000010453 quartz Substances 0.000 claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 30
- 230000008859 change Effects 0.000 claims description 26
- 238000012546 transfer Methods 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 9
- 230000001419 dependent effect Effects 0.000 description 8
- 239000000306 component Substances 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000003455 independent Effects 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000008542 thermal sensitivity Effects 0.000 description 1
- 238000002849 thermal shift Methods 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
- G01D5/241—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes
- G01D5/2417—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying separation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0072—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance
- G01L9/0075—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance using a ceramic diaphragm, e.g. alumina, fused quartz, glass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0082—Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means
- G01L9/0086—Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means using variations in capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor
- G01L9/125—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor with temperature compensating means
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US87805678A | 1978-02-15 | 1978-02-15 | |
| US878,056 | 1978-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1123225A true CA1123225A (en) | 1982-05-11 |
Family
ID=25371286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA319,755A Expired CA1123225A (en) | 1978-02-15 | 1979-01-16 | Compensated capacitive transducer demodulator circuit |
Country Status (8)
| Country | Link |
|---|---|
| JP (2) | JPS54115175A (ja) |
| AU (1) | AU521105B2 (ja) |
| CA (1) | CA1123225A (ja) |
| DE (1) | DE2905463A1 (ja) |
| ES (1) | ES477752A1 (ja) |
| FR (1) | FR2417887B1 (ja) |
| GB (1) | GB2015162B (ja) |
| IT (1) | IT1111910B (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4295376A (en) * | 1978-12-01 | 1981-10-20 | Besco Industries, Inc. | Force responsive transducer |
| US4288835A (en) * | 1979-04-16 | 1981-09-08 | The Bendix Corporation | Pressure sensor |
| US4322977A (en) * | 1980-05-27 | 1982-04-06 | The Bendix Corporation | Pressure measuring system |
| US4509007A (en) * | 1982-09-30 | 1985-04-02 | Ibm Corporation | Differential sensor measuring apparatus and method including sensor compensator circuitry |
| FR2632069B1 (fr) * | 1988-05-30 | 1990-12-14 | Garcia Manuel | Capteur de detection par vitesse de variation d'impedance ou par variation d'impedance |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3318153A (en) * | 1962-12-04 | 1967-05-09 | Rosemount Eng Co Ltd | Diode loop capacitor comparative circuit including a pair of transformer windings coupled in phase |
| US3271669A (en) * | 1962-12-04 | 1966-09-06 | Rosemount Eng Co Ltd | Alternating current diode loop capacitance measurement circuits |
| GB1110943A (en) * | 1963-10-01 | 1968-04-24 | Sangamo Weston | Improvements in or relating to electrical bridge networks |
| US3646538A (en) * | 1969-10-27 | 1972-02-29 | Rosemount Eng Co Ltd | Transducer circuitry for converting a capacitance signal to a dc current signal |
| US3648165A (en) * | 1970-09-24 | 1972-03-07 | Sun Oil Co | Capacitance-measuring apparatus including means maintaining the voltage across the unknown capacitance constant |
| US3883812A (en) * | 1971-12-20 | 1975-05-13 | Nasa | Diode-quad bridge circuit means |
| US3869672A (en) * | 1972-05-13 | 1975-03-04 | Int Standard Electric Corp | Method and arrangements for the digital control of operating functions, radio and television receivers |
| DE2314754C2 (de) * | 1973-03-24 | 1979-02-08 | Hottinger Baldwin Messtechnik Gmbh, 6100 Darmstadt | Elektrische Vielstellen-Meßeinrichtung |
| JPS5144662A (ja) * | 1974-10-08 | 1976-04-16 | Masakichi Kawahara | |
| JPS5252676A (en) * | 1975-10-24 | 1977-04-27 | Yokogawa Hokushin Electric Corp | Capacity-to-electricity converter |
-
1979
- 1979-01-16 CA CA319,755A patent/CA1123225A/en not_active Expired
- 1979-01-25 AU AU43655/79A patent/AU521105B2/en not_active Ceased
- 1979-01-26 GB GB7902832A patent/GB2015162B/en not_active Expired
- 1979-02-13 DE DE19792905463 patent/DE2905463A1/de active Granted
- 1979-02-14 IT IT20175/79A patent/IT1111910B/it active
- 1979-02-15 ES ES477752A patent/ES477752A1/es not_active Expired
- 1979-02-15 FR FR7903843A patent/FR2417887B1/fr not_active Expired
- 1979-02-15 JP JP1555279A patent/JPS54115175A/ja active Pending
-
1987
- 1987-11-12 JP JP1987172089U patent/JPS6344731Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2015162B (en) | 1982-08-18 |
| DE2905463A1 (de) | 1979-08-16 |
| AU521105B2 (en) | 1982-03-18 |
| JPS6344731Y2 (ja) | 1988-11-21 |
| FR2417887A1 (fr) | 1979-09-14 |
| DE2905463C2 (ja) | 1989-12-28 |
| ES477752A1 (es) | 1979-10-16 |
| IT1111910B (it) | 1986-01-13 |
| AU4365579A (en) | 1979-08-23 |
| JPS54115175A (en) | 1979-09-07 |
| FR2417887B1 (fr) | 1985-06-07 |
| IT7920175A0 (it) | 1979-02-14 |
| JPS6396415U (ja) | 1988-06-22 |
| GB2015162A (en) | 1979-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4289035A (en) | Compensated capacitive transducer demodulator circuit | |
| EP2002213B1 (en) | Capacitance sensing circuit | |
| US4392382A (en) | Linearized electronic capacitive pressure transducer | |
| US4550611A (en) | Electronic pressure transducer | |
| JPH0440105A (ja) | 線形化増幅回路 | |
| EP0872713A3 (en) | Sensor with improved capacitive to voltage converter integrated circuit | |
| US5148126A (en) | Capacitance sensor circuit and method for measuring capacitance and small changes in capacitance | |
| US5134885A (en) | Circuit arrangement for measuring a mechanical deformation, in particular under the influence of a pressure | |
| US5132609A (en) | Circuit for measuring the level of an electrical signal and including offset correction means, and application thereof to amplifiers having automatic gain control | |
| GB2307749A (en) | Compensation for temperature influence in sensing means | |
| JP3085209B2 (ja) | 表面電位センサ | |
| JP3664041B2 (ja) | 電荷型センサ用増幅回路 | |
| CA1123225A (en) | Compensated capacitive transducer demodulator circuit | |
| US4006430A (en) | Circuit arrangement for converting a bridge unbalance into a frequency variation | |
| EP0879483A1 (en) | Temperature compensated logarithmic detector | |
| US5136262A (en) | Oscillator circuit and method for measuring capacitance and small changes in capacitance | |
| GB1592020A (en) | Circuit for the linearization of the output signal of a probe signal having a temperature dependant characteristic | |
| US4793187A (en) | Circuit arrangement for the compensation of temperature-dependent and temperature-independent drift and for the compensation of the sensitivity of a capacitive sensor | |
| JP3620998B2 (ja) | 導電性物体の端部検出装置 | |
| US3328569A (en) | Square root extracting network | |
| TW591235B (en) | Electrical potential fixing apparatus and potential fixing method | |
| US5131281A (en) | Strain sensing apparatus | |
| US4395642A (en) | Sine-shaping circuit | |
| JPS61137012A (ja) | 回転情報出力装置 | |
| EP0618452B1 (en) | An average power detector circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |