GB724769A - Improvements in or relating to devices for measuring very weak currents - Google Patents
Improvements in or relating to devices for measuring very weak currentsInfo
- Publication number
- GB724769A GB724769A GB155/53A GB15553A GB724769A GB 724769 A GB724769 A GB 724769A GB 155/53 A GB155/53 A GB 155/53A GB 15553 A GB15553 A GB 15553A GB 724769 A GB724769 A GB 724769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- capacitor
- relating
- measuring
- devices
- jan
- 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
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
724,769. Electric tests. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Jan. 2, 1953 [Jan. 7, 1952], No. 155/53. Class 37. [Also in Group XL (b)] The weak current from, e.g., an ionization chamber 1 (Fig. 2) is measured by means of a capacitor 5 which is intermittently charged by the ionization current by the movement of a contact 3 driven by known vibration apparatus, and then discharged. The A.C. component of the voltage across capacitor 5 may be amplified and measured on a rectifier meter, or the D.C. component of the voltage across a capacitor 12 in series with the ionization chamber 1 and in parallel with the capacitor 5 and vibrating contact 3 may be modulated by a capacitor 13 having one vibrating electrode, and amplified at 8 for indication on a meter 10 after rectification at 9. The amplifier 8 is connected to the vibrator 3 in negative feedback relationship.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL724769X | 1952-01-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB724769A true GB724769A (en) | 1955-02-23 |
Family
ID=19817759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB155/53A Expired GB724769A (en) | 1952-01-07 | 1953-01-02 | Improvements in or relating to devices for measuring very weak currents |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB724769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208845A (en) * | 2019-06-06 | 2019-09-06 | 中国工程物理研究院核物理与化学研究所 | A kind of modulation module of Current detector output electric current |
-
1953
- 1953-01-02 GB GB155/53A patent/GB724769A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208845A (en) * | 2019-06-06 | 2019-09-06 | 中国工程物理研究院核物理与化学研究所 | A kind of modulation module of Current detector output electric current |
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