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Class Information
Number: 324/608
Name: Electricity: measuring and testing > Impedance, admittance or other quantities representative of electrical stimulus/response relationships > With auxiliary means to condition stimulus/response signals > For response signal evaluation or processing > Including a ratiometric function
Description: Subject matter wherein the evaluation or process includes a value which represents the ratio of a first signal to a second signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7453268 |
Input power protected ratiometric output sensor circuit |
Nov. 18, 2008 |
| 7403816 |
Method and apparatus for analyzing bioelectrical response waveform information, and diagnostic apparatus thereof |
Jul. 22, 2008 |
| 6906532 |
Method for digitally measuring electrical impedance |
Jun. 14, 2005 |
| 6861852 |
Method for measuring a gap between a proximity probe and a conductive target material |
Mar. 1, 2005 |
| 6826490 |
Transducer calibration system: apparatus and method |
Nov. 30, 2004 |
| 6756794 |
Apparatus for determining a gap between a proximity probe component and a conductive target material |
Jun. 29, 2004 |
| 6703843 |
Device for digitally measuring electrical impedance |
Mar. 9, 2004 |
| 6580277 |
Device for the ratiometric measurement of sensor signals |
Jun. 17, 2003 |
| 6417674 |
Two port self-calibration for an N-port network analyzer |
Jul. 9, 2002 |
| 6147501 |
Automatic calibration of a network analyzer |
Nov. 14, 2000 |
| 5744968 |
Ratiometric circuit |
Apr. 28, 1998 |
| 5610847 |
Ratiometric fourier analyzer |
Mar. 11, 1997 |
| 5579247 |
Method and apparatus for decreasing the interference and noise sensitivity of a ratiometric converter type of circuit |
Nov. 26, 1996 |
| 5229726 |
Portable device for use in the measurement of a component content of a material |
Jul. 20, 1993 |
| 5113140 |
Microprocessor-controlled high-voltage capacitance bridge |
May. 12, 1992 |
| 5103184 |
Capacitive fuel composition sensor with ground isolation |
Apr. 7, 1992 |
| 5077527 |
Encoding system and method for differential capacitive transducer |
Dec. 31, 1991 |
| 5075631 |
Encoding system and method for differential capacitive transducer |
Dec. 24, 1991 |
| 5028874 |
Ratiometric measurement circuit with improved noise rejection |
Jul. 2, 1991 |
| 5019781 |
Source level control for impedance meter |
May. 28, 1991 |
| 5007283 |
Method and device for processing measured values |
Apr. 16, 1991 |
| 4841227 |
Apparatus for the ratiometric measurement of a quantity of liquid in a tank |
Jun. 20, 1989 |
| 4816745 |
Method and arrangement for measuring the resistance ratio in a resistance half-bridge |
Mar. 28, 1989 |
| 4797603 |
Device for measuring the ratio of two low value capacities |
Jan. 10, 1989 |
| 4794320 |
Multi-frequency capacitance sensor |
Dec. 27, 1988 |
| 4772844 |
High precision capacitance bridge |
Sep. 20, 1988 |
| 4766369 |
Ice detector |
Aug. 23, 1988 |
| 4716361 |
Capacitance measuring method and apparatus |
Dec. 29, 1987 |
| 4555661 |
Method and apparatus for determining dielectric constant |
Nov. 26, 1985 |
| 4490671 |
Apparatus and method for determining the number of turns on a sample coil |
Dec. 25, 1984 |
| 4485284 |
Apparatus and process for microwave moisture analysis |
Nov. 27, 1984 |
| 4475080 |
Microwave moisture measurement of moving particulate layer after thickness leveling |
Oct. 2, 1984 |
| 4368421 |
Frequency modulated microwave in combination with a voltage detector and comparator device for measuring a varying moisture content of sheet-like samples |
Jan. 11, 1983 |
| 4345203 |
Device for measuring the lubrication of surfaces rolling or sliding relative to each other and lubricated with a lubricant |
Aug. 17, 1982 |
| 4342089 |
Method of and apparatus for automatic measurement of circuit parameters with microprocessor calculation techniques |
Jul. 27, 1982 |
| 4327573 |
Method and apparatus for determining the low temperature characteristics of materials |
May. 4, 1982 |
| 4290009 |
Standing wave ratio detecting apparatus |
Sep. 15, 1981 |
| 4249127 |
Standing wave ratio measuring system |
Feb. 3, 1981 |
| 4242631 |
Front-end circuit apparatus for impedance measurements and the like |
Dec. 30, 1980 |
| 4228392 |
Second order correction in linearized proximity probe |
Oct. 14, 1980 |
| 4156181 |
Ratio circuit |
May. 22, 1979 |
| 4117398 |
Method and apparatus for measuring the filling effectiveness of a cable during filling |
Sep. 26, 1978 |
| 4080562 |
Apparatus for measuring capacitance or resistance and for testing a capacitance responsive gaging system |
Mar. 21, 1978 |
| 4021733 |
Moisture meters |
May. 3, 1977 |
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