JPS558859B2 - - Google Patents
Info
- Publication number
- JPS558859B2 JPS558859B2 JP12003973A JP12003973A JPS558859B2 JP S558859 B2 JPS558859 B2 JP S558859B2 JP 12003973 A JP12003973 A JP 12003973A JP 12003973 A JP12003973 A JP 12003973A JP S558859 B2 JPS558859 B2 JP S558859B2
- Authority
- JP
- Japan
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
- H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
- H04L27/148—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using filters, including PLL-type filters
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Complex Calculations (AREA)
- Filters That Use Time-Delay Elements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00307716A US3803501A (en) | 1972-11-17 | 1972-11-17 | Frequency discriminator using digital non-recursive filters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4983360A JPS4983360A (en:Method) | 1974-08-10 |
| JPS558859B2 true JPS558859B2 (en:Method) | 1980-03-06 |
Family
ID=23190909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12003973A Expired JPS558859B2 (en:Method) | 1972-11-17 | 1973-10-26 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3803501A (en:Method) |
| JP (1) | JPS558859B2 (en:Method) |
| CA (1) | CA992161A (en:Method) |
| DE (1) | DE2356955C3 (en:Method) |
| FR (1) | FR2207390B1 (en:Method) |
| GB (1) | GB1409681A (en:Method) |
| IT (1) | IT998646B (en:Method) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4215425A (en) * | 1978-02-27 | 1980-07-29 | Sangamo Weston, Inc. | Apparatus and method for filtering signals in a logging-while-drilling system |
| DE3121444A1 (de) * | 1981-05-29 | 1982-12-16 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und anordnung zum demodulieren von fsk-signalen |
| DE3212054A1 (de) * | 1982-04-01 | 1983-10-06 | Blaupunkt Werke Gmbh | Digitaler demodulator |
| DE3438370C1 (de) * | 1984-10-19 | 1986-04-03 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Verfahren zur Demodulation eines frequenzmodulierten Datensignals |
| DE3517485A1 (de) * | 1985-05-15 | 1986-11-20 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Demodulator fuer frequenzmodulierte signale in digitaler form |
| DE3674096D1 (de) * | 1985-07-03 | 1990-10-18 | Siemens Ag | Digitale filterweiche, insbesondere fuer einen datenempfaenger. |
| JP2558655B2 (ja) * | 1986-10-20 | 1996-11-27 | 松下電器産業株式会社 | ディジタルｆｍ復調器 |
| GB8703136D0 (en) * | 1987-02-11 | 1987-03-18 | Univ Cardiff | Filtering electrical signals |
| GB8719849D0 (en) * | 1987-08-21 | 1987-09-30 | British Telecomm | Fsk discriminator |
| US5119326A (en) * | 1989-12-06 | 1992-06-02 | Transwitch Corporation | Waveshaping transversal filter and method utilizing the same for data transmission over coaxial cable |
| JP2581306B2 (ja) * | 1990-11-24 | 1997-02-12 | 日本電気株式会社 | ディジタル方式直交位相検波回路 |
| FR2681197B1 (fr) * | 1991-09-09 | 1993-10-29 | France Telecom | Discriminateur de frequence tronique. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3521042A (en) * | 1967-07-19 | 1970-07-21 | Ibm | Simplified digital filter |
| US3689844A (en) * | 1969-12-11 | 1972-09-05 | Bell Telephone Labor Inc | Digital filter receiver for frequency-shift data signals |
-
1972
- 1972-11-17 US US00307716A patent/US3803501A/en not_active Expired - Lifetime
-
1973
- 1973-09-25 IT IT29345/73A patent/IT998646B/it active
- 1973-09-27 FR FR7335258A patent/FR2207390B1/fr not_active Expired
- 1973-10-04 GB GB4631173A patent/GB1409681A/en not_active Expired
- 1973-10-23 CA CA184,074A patent/CA992161A/en not_active Expired
- 1973-10-26 JP JP12003973A patent/JPS558859B2/ja not_active Expired
- 1973-11-15 DE DE2356955A patent/DE2356955C3/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2207390B1 (en:Method) | 1976-04-30 |
| DE2356955A1 (de) | 1974-05-22 |
| US3803501A (en) | 1974-04-09 |
| IT998646B (it) | 1976-02-20 |
| FR2207390A1 (en:Method) | 1974-06-14 |
| JPS4983360A (en:Method) | 1974-08-10 |
| CA992161A (en) | 1976-06-29 |
| DE2356955C3 (de) | 1981-11-26 |
| DE2356955B2 (de) | 1981-03-26 |
| GB1409681A (en) | 1975-10-15 |