GB1123917A - Improvements in or relating to a.c. peak voltmeters - Google Patents
Improvements in or relating to a.c. peak voltmetersInfo
- Publication number
- GB1123917A GB1123917A GB3063866A GB3063866A GB1123917A GB 1123917 A GB1123917 A GB 1123917A GB 3063866 A GB3063866 A GB 3063866A GB 3063866 A GB3063866 A GB 3063866A GB 1123917 A GB1123917 A GB 1123917A
- Authority
- GB
- United Kingdom
- Prior art keywords
- peak
- condenser
- input
- transistor
- emitter
- 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
- G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
1,123,917. Peak voltage measurement. MARCONI INSTRUMENTS Ltd. May 10, 1967 [July 7, 1966], No.30638/66. Heading G1U. An A. C. peak voltmeter is of the type where the input is applied to a peak to peak rectifier circuit, the voltage across which is set up across a condenser 4 and applied to an emitter follower 5 which has a meter 6 in its emitter circuit. When measuring peaks in a low frequency signal, a large capacitor 4 is required, and the voltage across it takes a long time to decay if the input is suddenly removed or falls rapidly. The invention provides an additional discharge path for the condenser 4 in these circumstances, so that this time is substantially reduced. When the input starts to fall, so does the potential at the emitter of transistor 5, and this is transferred via condenser 11 to switch on a normally cut off transistor 12. The potential change at the collector of this switches on a normally cut off transistor 13, which provides a low impedance discharge path for the condenser 4, so that a cummulative action rapidly builds up until the charge on 4 corresponds to a new lower input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3063866A GB1123917A (en) | 1966-07-07 | 1966-07-07 | Improvements in or relating to a.c. peak voltmeters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3063866A GB1123917A (en) | 1966-07-07 | 1966-07-07 | Improvements in or relating to a.c. peak voltmeters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1123917A true GB1123917A (en) | 1968-08-14 |
Family
ID=10310762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3063866A Expired GB1123917A (en) | 1966-07-07 | 1966-07-07 | Improvements in or relating to a.c. peak voltmeters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1123917A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2227991A1 (en) * | 1971-06-08 | 1973-01-04 | Rca Corp | DETECTOR CIRCUIT |
-
1966
- 1966-07-07 GB GB3063866A patent/GB1123917A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2227991A1 (en) * | 1971-06-08 | 1973-01-04 | Rca Corp | DETECTOR CIRCUIT |
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