IT7925368A0 - Rivelatore per accertare la presenza di un segnale elettrico con prestabilite proprieta'. - Google Patents
Rivelatore per accertare la presenza di un segnale elettrico con prestabilite proprieta'.Info
- Publication number
- IT7925368A0 IT7925368A0 IT7925368A IT2536879A IT7925368A0 IT 7925368 A0 IT7925368 A0 IT 7925368A0 IT 7925368 A IT7925368 A IT 7925368A IT 2536879 A IT2536879 A IT 2536879A IT 7925368 A0 IT7925368 A0 IT 7925368A0
- Authority
- IT
- Italy
- Prior art keywords
- assert
- detector
- electrical signal
- preset properties
- preset
- Prior art date
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
- G01R19/0038—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing pulses or pulse trains according to amplitude)
-
- 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
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/17—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values giving an indication of the number of times this occurs, i.e. multi-channel analysers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Noise Elimination (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Measurement Of Current Or Voltage (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH919678A CH635695A5 (de) | 1978-08-31 | 1978-08-31 | Detektor zur feststellung der anwesenheit mindestens eines elektrischen signals mit einer vorbestimmten charakteristik. |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7925368A0 true IT7925368A0 (it) | 1979-08-30 |
IT1122899B IT1122899B (it) | 1986-04-30 |
Family
ID=4349397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT25368/79A IT1122899B (it) | 1978-08-31 | 1979-08-30 | Rivelatore per accertare la presenza di un segnale elettrico con pre stabilite proprieta |
Country Status (6)
Country | Link |
---|---|
US (1) | US4297533A (it) |
CH (1) | CH635695A5 (it) |
DE (1) | DE2840908C2 (it) |
FR (1) | FR2435042A1 (it) |
GB (1) | GB2029588B (it) |
IT (1) | IT1122899B (it) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58143394A (ja) * | 1982-02-19 | 1983-08-25 | 株式会社日立製作所 | 音声区間の検出・分類方式 |
DE3275052D1 (en) * | 1982-06-25 | 1987-02-12 | Ibm | Tone detector and multifrequency receiver using this detector |
DE3280074D1 (de) * | 1982-10-26 | 1990-02-01 | Sharp Kk | Verminderung von stoerungen in einem system zur signaluebertragung ueber die elektrischen versorgungsleitungen. |
US4514697A (en) * | 1983-02-09 | 1985-04-30 | Westinghouse Electric Corp. | Coherent phase shift keyed demodulator with improved sampling apparatus and method |
US4577332A (en) * | 1983-03-14 | 1986-03-18 | General Electric Company | Digital decoding arrangement |
US4627091A (en) * | 1983-04-01 | 1986-12-02 | Rca Corporation | Low-energy-content voice detection apparatus |
JPS603700A (ja) * | 1983-06-22 | 1985-01-10 | 日本電気株式会社 | 音声検出方式 |
US4783845A (en) * | 1985-12-20 | 1988-11-08 | Itt Aerospace Optical | Digital tone squelch detector |
US4742537A (en) * | 1986-06-04 | 1988-05-03 | Electronic Information Systems, Inc. | Telephone line monitoring system |
US4815137A (en) * | 1986-11-06 | 1989-03-21 | American Telephone And Telegraph Company | Voiceband signal classification |
US4815136A (en) * | 1986-11-06 | 1989-03-21 | American Telephone And Telegraph Company | Voiceband signal classification |
JP2632852B2 (ja) * | 1987-06-13 | 1997-07-23 | 株式会社ケンウッド | デジタルssb変調器 |
US4989169A (en) * | 1990-02-05 | 1991-01-29 | Motorola, Inc. | Digital tone detector using a ratio of two demodulators of differing frequency |
DE10043160B4 (de) * | 2000-09-01 | 2009-11-26 | Infineon Technologies Ag | Tonsignalerkennungsschaltung und Verfahren zur Erkennung von Tonsignalen |
US7042221B2 (en) * | 2002-07-31 | 2006-05-09 | Syracuse University | System and method for detecting a narrowband signal |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE758044A (fr) * | 1969-04-30 | 1971-04-27 | Int Standard Electric Corp | Appareil de reconnaissance de la parole |
US3588363A (en) * | 1969-07-30 | 1971-06-28 | Rca Corp | Word recognition system for voice controller |
DE2240557A1 (de) * | 1971-08-18 | 1973-02-22 | Jean Albert Dreyfus | Spracherkennungsvorrichtung zum steuern von maschinen |
GB1433770A (en) * | 1973-01-05 | 1976-04-28 | Xerox Corp | Word recognition system with character string encoding |
US3944753A (en) * | 1974-10-31 | 1976-03-16 | Proctor & Associates Company | Apparatus for distinguishing voice and other noise signals from legitimate multi-frequency tone signals present on telephone or similar communication lines |
US3990006A (en) * | 1975-01-08 | 1976-11-02 | Bell Telephone Laboratories, Incorporated | Digital tone detector using concatenated detection intervals |
US3937899A (en) * | 1975-01-30 | 1976-02-10 | Bell Telephone Laboratories, Incorporated | Tone detector using spectrum parameter estimation |
US4009353A (en) * | 1975-06-23 | 1977-02-22 | International Business Machines Corporation | Analog signal detection |
IT1044353B (it) * | 1975-07-03 | 1980-03-20 | Telettra Lab Telefon | Metodo e dispositivo per il rico noscimento della presenza e.o assenza di segnale utile parola parlato su linee foniche canali fonici |
DE2555248C2 (de) * | 1975-12-09 | 1983-03-24 | Rohde & Schwarz GmbH & Co KG, 8000 München | Anordnung zum selbsttätigen Erkennen von Informationen |
US4063031A (en) * | 1976-04-19 | 1977-12-13 | Threshold Technology, Inc. | System for channel switching based on speech word versus noise detection |
GB1520589A (en) * | 1976-06-17 | 1978-08-09 | Gen Instr Microelect | Multi-frequency receiver circuits |
-
1978
- 1978-08-31 CH CH919678A patent/CH635695A5/de not_active IP Right Cessation
- 1978-09-20 DE DE2840908A patent/DE2840908C2/de not_active Expired
-
1979
- 1979-06-07 US US06/046,508 patent/US4297533A/en not_active Expired - Lifetime
- 1979-07-24 FR FR7919036A patent/FR2435042A1/fr active Granted
- 1979-08-23 GB GB7929338A patent/GB2029588B/en not_active Expired
- 1979-08-30 IT IT25368/79A patent/IT1122899B/it active
Also Published As
Publication number | Publication date |
---|---|
FR2435042B1 (it) | 1983-03-25 |
CH635695A5 (de) | 1983-04-15 |
FR2435042A1 (fr) | 1980-03-28 |
GB2029588B (en) | 1983-02-02 |
GB2029588A (en) | 1980-03-19 |
US4297533A (en) | 1981-10-27 |
IT1122899B (it) | 1986-04-30 |
DE2840908B1 (de) | 1980-03-06 |
DE2840908C2 (de) | 1984-07-12 |
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