GB2209221B - Hydrophone demodulator circuit and method - Google Patents
Hydrophone demodulator circuit and methodInfo
- Publication number
- GB2209221B GB2209221B GB8820545A GB8820545A GB2209221B GB 2209221 B GB2209221 B GB 2209221B GB 8820545 A GB8820545 A GB 8820545A GB 8820545 A GB8820545 A GB 8820545A GB 2209221 B GB2209221 B GB 2209221B
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrophone
- demodulator circuit
- demodulator
- circuit
- hydrophone demodulator
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9197487A | 1987-09-01 | 1987-09-01 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8820545D0 GB8820545D0 (en) | 1988-09-28 |
| GB2209221A GB2209221A (en) | 1989-05-04 |
| GB2209221B true GB2209221B (en) | 1991-10-23 |
Family
ID=22230578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8820545A Expired - Fee Related GB2209221B (en) | 1987-09-01 | 1988-08-31 | Hydrophone demodulator circuit and method |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1339426C (en) |
| GB (1) | GB2209221B (en) |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2159947A (en) * | 1984-04-06 | 1985-12-11 | Inst Francais Du Petrole | Processing modulated signals received by a side-looking sonar system |
| GB2184231A (en) * | 1985-12-02 | 1987-06-17 | Exxon Production Research Co | Fiber optic data gathering system |
| GB2184237A (en) * | 1985-10-21 | 1987-06-17 | Plessey Co Plc | Acoustic wave sensing systems |
-
1988
- 1988-08-31 CA CA 576210 patent/CA1339426C/en not_active Expired - Fee Related
- 1988-08-31 GB GB8820545A patent/GB2209221B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2159947A (en) * | 1984-04-06 | 1985-12-11 | Inst Francais Du Petrole | Processing modulated signals received by a side-looking sonar system |
| GB2184237A (en) * | 1985-10-21 | 1987-06-17 | Plessey Co Plc | Acoustic wave sensing systems |
| GB2184231A (en) * | 1985-12-02 | 1987-06-17 | Exxon Production Research Co | Fiber optic data gathering system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CA1339426C (en) | 1997-09-02 |
| GB2209221A (en) | 1989-05-04 |
| GB8820545D0 (en) | 1988-09-28 |
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| Date | Code | Title | Description |
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| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950831 |