GB1068322A - Impedance bridges - Google Patents
Impedance bridgesInfo
- Publication number
- GB1068322A GB1068322A GB1206263A GB1206263A GB1068322A GB 1068322 A GB1068322 A GB 1068322A GB 1206263 A GB1206263 A GB 1206263A GB 1206263 A GB1206263 A GB 1206263A GB 1068322 A GB1068322 A GB 1068322A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- impedance
- setting
- amplifier
- standard
- 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
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
1,068,322. Impedance measuring bridges. JOSEPH LUCAS (INDUSTRIES) Ltd. Feb. 27, 1964 (March 27, 1963], No. 12062/63. Heading G1U. An impedance bridge comprises an oscillator 19, the output from which is connected by parallel paths to a detector 16, one path including the unknown impedance 21, and the other including a resistor chain 22, an amplifier 23 having a high input impedance and a low output impedance, and a standard impedance 24. The amplifier 23 prevents the standard impedance 24 shunting the resistance chain 22. For capacitance measurement, the setting of resistor 22 gives the value of the unknown capacitance, and the setting of resistor 26 gives the Q factor. Where Q is low <SP>1</SP>/Q, or tan d, is measured by replacing resistor 26 by a fixed resistor (27) and a potentiometer (28), Fig. 2 (not shown). Loss in the standard capacitor 24 may be compensated by bridging it with two series connected capacitors, and, earthing the junction of the two capacitors through a further resistor. Fig. 4 (not shown) illustrates measurement of inductance, the setting of a resistor (34) indicating Q. For measuring very high Q inductors, the modified amplifier output circuit of Fig. 5 is employed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1206263A GB1068322A (en) | 1963-03-27 | 1963-03-27 | Impedance bridges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1206263A GB1068322A (en) | 1963-03-27 | 1963-03-27 | Impedance bridges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1068322A true GB1068322A (en) | 1967-05-10 |
Family
ID=9997732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1206263A Expired GB1068322A (en) | 1963-03-27 | 1963-03-27 | Impedance bridges |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1068322A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110772232A (en) * | 2019-12-31 | 2020-02-11 | 成都怡康科技有限公司 | Electrode falling detection circuit and detection method |
-
1963
- 1963-03-27 GB GB1206263A patent/GB1068322A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110772232A (en) * | 2019-12-31 | 2020-02-11 | 成都怡康科技有限公司 | Electrode falling detection circuit and detection method |
| CN110772232B (en) * | 2019-12-31 | 2020-04-28 | 成都怡康科技有限公司 | Electrode falling detection circuit and detection method |
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