FI944857A0 - A method for detecting a signal of a predetermined frequency and a detector circuit - Google Patents
A method for detecting a signal of a predetermined frequency and a detector circuitInfo
- Publication number
- FI944857A0 FI944857A0 FI944857A FI944857A FI944857A0 FI 944857 A0 FI944857 A0 FI 944857A0 FI 944857 A FI944857 A FI 944857A FI 944857 A FI944857 A FI 944857A FI 944857 A0 FI944857 A0 FI 944857A0
- Authority
- FI
- Finland
- Prior art keywords
- detecting
- signal
- predetermined frequency
- detector circuit
- detector
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- 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
- G01R19/0007—Frequency selective voltage or current level measuring
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
-
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI944857A FI99166C (en) | 1994-10-14 | 1994-10-14 | A method for detecting a signal having a predetermined frequency and a detection circuit |
EP95934161A EP0786093A1 (en) | 1994-10-14 | 1995-10-11 | Method for detecting a signal |
CN 95196167 CN1082666C (en) | 1994-10-14 | 1995-10-11 | Method for detecting a signal |
AU36557/95A AU3655795A (en) | 1994-10-14 | 1995-10-11 | Method for detecting a signal |
PCT/FI1995/000563 WO1996012196A1 (en) | 1994-10-14 | 1995-10-11 | Method for detecting a signal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI944857 | 1994-10-14 | ||
FI944857A FI99166C (en) | 1994-10-14 | 1994-10-14 | A method for detecting a signal having a predetermined frequency and a detection circuit |
Publications (4)
Publication Number | Publication Date |
---|---|
FI944857A0 true FI944857A0 (en) | 1994-10-14 |
FI944857A FI944857A (en) | 1996-04-15 |
FI99166B FI99166B (en) | 1997-06-30 |
FI99166C FI99166C (en) | 1997-10-10 |
Family
ID=8541595
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI944857A FI99166C (en) | 1994-10-14 | 1994-10-14 | A method for detecting a signal having a predetermined frequency and a detection circuit |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0786093A1 (en) |
CN (1) | CN1082666C (en) |
AU (1) | AU3655795A (en) |
FI (1) | FI99166C (en) |
WO (1) | WO1996012196A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9634703B2 (en) * | 2015-07-29 | 2017-04-25 | Raytheon Company | Low power encoded signal detection |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES8700528A1 (en) * | 1984-05-04 | 1986-10-01 | Ates Componenti Elettron | Monolithically integratable telephone circuit for generating control signals for displaying telephone charges |
DE3832145A1 (en) * | 1988-09-22 | 1990-03-29 | Philips Patentverwaltung | METHOD AND CIRCUIT FOR MEASURING SMALL ELECTRICAL SIGNALS |
FR2648661B1 (en) * | 1989-06-19 | 1994-03-04 | Alcatel Business Systems | LOW FREQUENCY ALTERNATIVE SIGNAL DETECTOR IN PARTICULAR FOR TELEPHONE TRUNK |
-
1994
- 1994-10-14 FI FI944857A patent/FI99166C/en active
-
1995
- 1995-10-11 EP EP95934161A patent/EP0786093A1/en not_active Withdrawn
- 1995-10-11 AU AU36557/95A patent/AU3655795A/en not_active Abandoned
- 1995-10-11 WO PCT/FI1995/000563 patent/WO1996012196A1/en not_active Application Discontinuation
- 1995-10-11 CN CN 95196167 patent/CN1082666C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN1162996A (en) | 1997-10-22 |
CN1082666C (en) | 2002-04-10 |
FI99166B (en) | 1997-06-30 |
WO1996012196A1 (en) | 1996-04-25 |
AU3655795A (en) | 1996-05-06 |
FI944857A (en) | 1996-04-15 |
FI99166C (en) | 1997-10-10 |
EP0786093A1 (en) | 1997-07-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | Publication of examined application |