GB1395635A - Electrical capacitance meter arrangement - Google Patents
Electrical capacitance meter arrangementInfo
- Publication number
- GB1395635A GB1395635A GB2978272A GB2978272A GB1395635A GB 1395635 A GB1395635 A GB 1395635A GB 2978272 A GB2978272 A GB 2978272A GB 2978272 A GB2978272 A GB 2978272A GB 1395635 A GB1395635 A GB 1395635A
- Authority
- GB
- United Kingdom
- Prior art keywords
- capacitor
- switch
- voltage
- capacitance
- integrator
- 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
- G01R27/2605—Measuring capacitance
Abstract
1395635 Measuring capacitance WIGGINS TEAPE RESEARCH & DEVELOPMENT Ltd 25 June 1973 [26 June 1972] 29782/72 Heading G1U The capacitance of a capacitor 6, Fig.1, under test is measured by the following steps:- (a) first, a switch 2 is closed to charge the capacitor 6 to a reference potential V, (b) second, the switch 2 is opened and a switch 3 is closed so that the charge on the capacitor 6 flows into an integrator 4, and (c) third, the output voltage from the integrator, which voltage varies directly with the capacitance of the capacitor 6, is sampled, held, and displayed 5. A suitable control circuit Fig.4 (not shown) is described in which during the charging phase the charged state of the capacitor 6 is detected by monitoring the voltage across a resistor (14) in series with the switch 2, and during the discharge phase the discharged state of the capacitor 6 is detected by monitoring the voltage across a resistor (16) in series with the switch 3. The arrangement is said to be particularly useful when testing paper carrying a dielectric layer for electrostatic printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2978272A GB1395635A (en) | 1972-06-26 | 1972-06-26 | Electrical capacitance meter arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2978272A GB1395635A (en) | 1972-06-26 | 1972-06-26 | Electrical capacitance meter arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1395635A true GB1395635A (en) | 1975-05-29 |
Family
ID=10297079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2978272A Expired GB1395635A (en) | 1972-06-26 | 1972-06-26 | Electrical capacitance meter arrangement |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1395635A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3413849A1 (en) * | 1984-02-21 | 1985-08-22 | Dietrich 8891 Obergriesbach Lüderitz | Capacitance measuring instrument |
| EP0222161A2 (en) * | 1985-10-10 | 1987-05-20 | CKD Praha oborovy podnik | Process, circuit and apparatus for capacitance measurements for very low frequencies |
| DE19681725B4 (en) * | 1995-12-26 | 2007-04-26 | Harald Southampton Philipp | Charge transfer capacitance sensor - charges sensing electrode for discharge to charge detection circuit with selectable time intervals set by microprocessor program, and transistor type discharging switch |
-
1972
- 1972-06-26 GB GB2978272A patent/GB1395635A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3413849A1 (en) * | 1984-02-21 | 1985-08-22 | Dietrich 8891 Obergriesbach Lüderitz | Capacitance measuring instrument |
| EP0222161A2 (en) * | 1985-10-10 | 1987-05-20 | CKD Praha oborovy podnik | Process, circuit and apparatus for capacitance measurements for very low frequencies |
| EP0222161A3 (en) * | 1985-10-10 | 1988-08-10 | CKD Praha oborovy podnik | Process, circuit and apparatus for capacitance measurements for very low frequencies |
| DE19681725B4 (en) * | 1995-12-26 | 2007-04-26 | Harald Southampton Philipp | Charge transfer capacitance sensor - charges sensing electrode for discharge to charge detection circuit with selectable time intervals set by microprocessor program, and transistor type discharging switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |