FR2294449B2 - - Google Patents
Info
- Publication number
- FR2294449B2 FR2294449B2 FR7441086A FR7441086A FR2294449B2 FR 2294449 B2 FR2294449 B2 FR 2294449B2 FR 7441086 A FR7441086 A FR 7441086A FR 7441086 A FR7441086 A FR 7441086A FR 2294449 B2 FR2294449 B2 FR 2294449B2
- Authority
- FR
- France
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
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- 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
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- 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
- G01R19/10—Measuring sum, difference or ratio
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Manipulation Of Pulses (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7441086A FR2294449A2 (fr) | 1974-12-13 | 1974-12-13 | Procede de determination du rapport des amplitudes de deux tensions sinusoidales utilisant un dispositif d'ecretage et circuits de mise en oeuvre |
| DE19752552290 DE2552290C3 (de) | 1974-11-21 | 1975-11-21 | Verfahren und Schaltungen zur Bestimmung des Verhältnisses der Amplituden von zwei sinusförmigen Spannungen |
| US05/862,160 US4169969A (en) | 1974-11-21 | 1977-12-19 | Apparatus for detecting in-band signalling signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7441086A FR2294449A2 (fr) | 1974-12-13 | 1974-12-13 | Procede de determination du rapport des amplitudes de deux tensions sinusoidales utilisant un dispositif d'ecretage et circuits de mise en oeuvre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2294449A2 FR2294449A2 (fr) | 1976-07-09 |
| FR2294449B2 true FR2294449B2 (forum.php) | 1980-04-30 |
Family
ID=9146124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7441086A Granted FR2294449A2 (fr) | 1974-11-21 | 1974-12-13 | Procede de determination du rapport des amplitudes de deux tensions sinusoidales utilisant un dispositif d'ecretage et circuits de mise en oeuvre |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2294449A2 (forum.php) |
-
1974
- 1974-12-13 FR FR7441086A patent/FR2294449A2/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2294449A2 (fr) | 1976-07-09 |