GB636214A - Improvements in apparatus for measuring small steady or slowly varying signals - Google Patents
Improvements in apparatus for measuring small steady or slowly varying signalsInfo
- Publication number
- GB636214A GB636214A GB1129647A GB1129647A GB636214A GB 636214 A GB636214 A GB 636214A GB 1129647 A GB1129647 A GB 1129647A GB 1129647 A GB1129647 A GB 1129647A GB 636214 A GB636214 A GB 636214A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- signals
- slowly varying
- measuring small
- input
- 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)
- Measurement Of Current Or Voltage (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Amplifiers (AREA)
Abstract
636,214. Current and voltage measurements. SHORT BROS. (ROCHESTER & BEDFORD), Ltd., and LEWIS, G. A. April 28, 1947, No. 11296. Drawings to Specification. [Class 37] [Also in Group XL (c)] Apparatus for measuring small steady or slowly varying signals of the type in which the signals are " chopped " and then amplified by a thermionic amplifier having a narrow band pass for increasing the discrimination against unwanted signals, is characterized in that the amplifier comprises a number of balanced stages coupled in cascade, the first two such stages being coupled through a tuned secondary transformer, and the rate of make and break of the signal input circuit being adjusted so that the fundamental frequency of the rectangular wave impressed on the input of the amplifier is the same as the frequency to which the transformer coupling is tuned. A pushpull amplifier having a voltage stabilized power supply is described in which the input to the amplifier is provided by a strain gauge and is interrupted by a motor driven make-and-break switch, the output being rectified and measured by a meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1129647A GB636214A (en) | 1947-04-28 | 1947-04-28 | Improvements in apparatus for measuring small steady or slowly varying signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1129647A GB636214A (en) | 1947-04-28 | 1947-04-28 | Improvements in apparatus for measuring small steady or slowly varying signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB636214A true GB636214A (en) | 1950-04-26 |
Family
ID=9983614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1129647A Expired GB636214A (en) | 1947-04-28 | 1947-04-28 | Improvements in apparatus for measuring small steady or slowly varying signals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB636214A (en) |
-
1947
- 1947-04-28 GB GB1129647A patent/GB636214A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB604939A (en) | Improvements in and relating to electric wave generating systems | |
| GB987235A (en) | Radio altimeters | |
| GB1187333A (en) | Eddy Current Testing System | |
| GB636214A (en) | Improvements in apparatus for measuring small steady or slowly varying signals | |
| ES470229A1 (en) | Common amplification system for video and audio frequency signals | |
| GB1109434A (en) | Improvements in or relating to electrical measuring apparatus | |
| FR2439505A1 (en) | Stereophonic signal phase detector - has two amplifier and integrating channels which provide power to LED display for in-phase and in-opposition conditions | |
| GB581982A (en) | Improvements relating to electrical apparatus for the measurement of distances by the reflection of electromagnetic waves | |
| GB914998A (en) | Electronic indicator system | |
| GB710378A (en) | Improvements relating to measurement of r.f. power | |
| GB742948A (en) | Improvements in or relating to apparatus for measuring the magnitude and position ofa standing wave in a waveguide section | |
| GB908387A (en) | Improvements in or relating to apparatus for measuring reflection coefficient | |
| GB642344A (en) | Improvements in or relating to radio receiving apparatus | |
| JPS55113964A (en) | Electric field intensity indicator | |
| SU87390A1 (en) | Instrument for measuring the energy of electrical discharge | |
| GB935519A (en) | Improvements in or relating to communication systems | |
| GB647199A (en) | Frequency discriminators | |
| JPS5691543A (en) | Optical signal receiver | |
| GB639686A (en) | Improvements relating to tuning means for mixed radio receivers adapted for amplitude modulation or frequency modulation | |
| GB626700A (en) | Improved arrangement for monitoring the frequency of an alternating current | |
| GB796082A (en) | Improved a.m. or f.m. radio receiver detector circuit | |
| GB896165A (en) | Improvements relating to waveguides | |
| GB628312A (en) | Improvements in or relating to frequency measurement | |
| GB702983A (en) | Improvements in or relating to telemetering systems | |
| GB642679A (en) | Improvements in oscillators |