GB873630A - Improvements in and relating to direct current amplifiers - Google Patents
Improvements in and relating to direct current amplifiersInfo
- Publication number
- GB873630A GB873630A GB36827/60A GB3682760A GB873630A GB 873630 A GB873630 A GB 873630A GB 36827/60 A GB36827/60 A GB 36827/60A GB 3682760 A GB3682760 A GB 3682760A GB 873630 A GB873630 A GB 873630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- tap
- impedance
- amplifier
- potentiometer
- 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
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000003381 stabilizer Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/185—Measuring radiation intensity with ionisation chamber arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/34—DC amplifiers in which all stages are DC-coupled
- H03F3/36—DC amplifiers in which all stages are DC-coupled with tubes only
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
873,630. Valve amplifying circuits. INDUSTRIAL NUCLEONICS CORPORATION. Nov. 22, 1957 [Dec. 18, 1956], No. 36827/60. Divided out of 873,629. Class 40(6) A direct current amplifier comprises first and second electronic devices 24, 25 each having electron emitter and electron collector discharge electrodes and a control electrode; a bridge circuit having two arms in parallel across a DC supply, the first arm comprising a voltage divider impedance having two potentiometer taps separated by a portion of the impedance, the first tap being connected to one of the discharge electrodes 50 of the first electronic device and one of the two taps being a variable potentiometer tap 27, the second arm comprising the discharge electrodes of the second electronic device 25 and an impedance 31, 32 having an intermediate tap 33; and a load impedance 35 connecting the second potentiometer tap to the intermediate tap. The input is applied to the control electrode 51 of the electron device 24 and the output is taken between the second potentiometer tap and the intermediate tap. The amplifier described forms part of a measuring system (Specification 873,629) used as a transmission type of thickness gauge. The output from the detector 10 is fed through a high resistance 15 to provide the input voltage for the amplifier, and the load impedance 35 of the amplifier includes a meter 34 in series with it and a sensitivity control 36 for the meter 34. A biasing circuit 16 is also included in the input circuit to oppose the input voltage to give a zero reading on the meter 34. The anode 52 of the valve 24 is connected to the control grid 54 of the valve 25, and the anode of the valve is connected back via resistor 38 to the screen of the valve 24 thus providing positive feed back to increase the amplifier gain. The anode load resistor 29 of the valve 24 is shunted by a capacitor 30 so that the time constant of this RC combination forms a stabilizer in the feed back loop to prevent large changes on the grid of valve 25.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US873630XA | 1956-12-18 | 1956-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB873630A true GB873630A (en) | 1961-07-26 |
Family
ID=22204733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36827/60A Expired GB873630A (en) | 1956-12-18 | 1957-11-22 | Improvements in and relating to direct current amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB873630A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1915088B1 (en) * | 1969-03-25 | 1970-12-23 | Frieseke & Hoepfner Gmbh | Area weight or thickness measuring system for the serial measurement of fast moving objects by means of radioactive radiation |
-
1957
- 1957-11-22 GB GB36827/60A patent/GB873630A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1915088B1 (en) * | 1969-03-25 | 1970-12-23 | Frieseke & Hoepfner Gmbh | Area weight or thickness measuring system for the serial measurement of fast moving objects by means of radioactive radiation |
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