GB1052412A - - Google Patents
Info
- Publication number
- GB1052412A GB1052412A GB1052412DA GB1052412A GB 1052412 A GB1052412 A GB 1052412A GB 1052412D A GB1052412D A GB 1052412DA GB 1052412 A GB1052412 A GB 1052412A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistors
- flowmeter
- base electrodes
- supplied
- circuit
- 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
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/60—Circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
1,052,412. Electro-physical measurement. MAWDSLEY'S Ltd. Sept. 10, 1963 [Aug. 28, 1962], No.32939/62. Heading G1N. [Also in Division H3 ] A differential amplifier for use in conjunction with an electromagnetic induction flowmeter comprises a pair of transistors whose emitter electrodes are connected together through at least one resistor and whose base electrodes are each supplied with a standing bias voltage, the output terminals of the flowmeter being connected to respective ones of the base electrodes, so that the output voltage developed across a load connected in the collecter circuit of one transistor is proportional to the difference between the signal voltages applied to the base electrodes and hence to the output of the flowmeter. Fig. 2 shows a circuit comprising series-connected transistors of opposite-conductivity types. In a second embodiment, Fig. 3 (not shown) two emittercoupled transistors of the same conductivity type are supplied through a third transistor connected as a constant-current source.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1052412A true GB1052412A (en) | 1900-01-01 |
Family
ID=1756993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1052412D Expired GB1052412A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1052412A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2118092A1 (en) * | 1970-04-14 | 1971-10-28 | Philips Nv | Magnetic flow meter |
| US6693486B1 (en) | 1999-02-15 | 2004-02-17 | Krohne Messtechnik Gmbh & Co. | Signal-processing circuit for a differential voltage, especially for a magnetoinductive flowmeter |
-
0
- GB GB1052412D patent/GB1052412A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2118092A1 (en) * | 1970-04-14 | 1971-10-28 | Philips Nv | Magnetic flow meter |
| US6693486B1 (en) | 1999-02-15 | 2004-02-17 | Krohne Messtechnik Gmbh & Co. | Signal-processing circuit for a differential voltage, especially for a magnetoinductive flowmeter |
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