GB974681A - Improvements in or relating to phase meters - Google Patents
Improvements in or relating to phase metersInfo
- Publication number
- GB974681A GB974681A GB585862A GB585862A GB974681A GB 974681 A GB974681 A GB 974681A GB 585862 A GB585862 A GB 585862A GB 585862 A GB585862 A GB 585862A GB 974681 A GB974681 A GB 974681A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- gates
- alternately
- feb
- voltages
- 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
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
974,681. Phase detectors. STANDARD TELEPHONES & CABLES Ltd. Feb. 8, 1963 [Feb. 15, 1962], No. 5858/62. Heading H3A. Two A.C. voltages are phase compared by applying pulses P, Q from them to opposite sides A, B of a bi-stable circuit F3 through AND-gates G3A, G3B which are enabled (opened) alternately but not by every pulse P, Q applied to them. To this end a further bistable switch F2 operated alternately to opposite states by one set of pulses P, applied to opposite sides of F2 through AND-gates G2A, G2B which are alternately enabled from one side A of F3 and from the corresponding opposite side B of bi-stable switch F2. The other side B of output bi-stable circuit F3 then produces rectangular waves of duration greater than the interval between successive Q pulses and dependent on the phase difference between P, Q and the two A.C. voltages which rectangular waves, e.g. through a telegraph line L, operate a meter V. Preferably the pulses P, Q, render non-conducting the sides of the bistable circuits to which they are applied and non-conduction produces an enabling output voltage to the gates. The A.C. waves may be converted to pulses by applying them over Zener or other diodes forming trapezoidal waveforms, which are then differentiated and output pulses of one polarity then suppressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB585862A GB974681A (en) | 1962-02-15 | 1962-02-15 | Improvements in or relating to phase meters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB585862A GB974681A (en) | 1962-02-15 | 1962-02-15 | Improvements in or relating to phase meters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB974681A true GB974681A (en) | 1964-11-11 |
Family
ID=9803955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB585862A Expired GB974681A (en) | 1962-02-15 | 1962-02-15 | Improvements in or relating to phase meters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB974681A (en) |
-
1962
- 1962-02-15 GB GB585862A patent/GB974681A/en not_active Expired
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