JPS6244452B2 - - Google Patents
Info
- Publication number
- JPS6244452B2 JPS6244452B2 JP57501242A JP50124282A JPS6244452B2 JP S6244452 B2 JPS6244452 B2 JP S6244452B2 JP 57501242 A JP57501242 A JP 57501242A JP 50124282 A JP50124282 A JP 50124282A JP S6244452 B2 JPS6244452 B2 JP S6244452B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- stereo
- input
- pilot tone
- 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
Links
- 238000001514 detection method Methods 0.000 description 28
- 230000010363 phase shift Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 7
- 230000007257 malfunction Effects 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
- H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
- H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
- H04H20/49—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for AM stereophonic broadcast systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/245,800 US4368356A (en) | 1981-03-20 | 1981-03-20 | Pilot tone detector utilizing phase deviation signals |
| US245800 | 1981-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58500346A JPS58500346A (ja) | 1983-03-03 |
| JPS6244452B2 true JPS6244452B2 (US07714131-20100511-C00024.png) | 1987-09-21 |
Family
ID=22928132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57501242A Granted JPS58500346A (ja) | 1981-03-20 | 1982-03-01 | 位相偏移信号を用いたパイロット・ト−ン検出回路 |
Country Status (7)
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4489431A (en) * | 1982-06-08 | 1984-12-18 | Motorola, Inc. | Signal interference protection circuit for AM stereo receiver |
| US4618981A (en) * | 1985-02-28 | 1986-10-21 | Motorola, Inc. | Tone detector with pseudo phase locked loop |
| US4641341A (en) * | 1985-08-28 | 1987-02-03 | Kahn Leonard R | Automatic multi-system AM stereo receiver using existing single-system AM stereo decoder IC |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3944749A (en) * | 1972-05-10 | 1976-03-16 | Kahn Leonard R | Compatible AM stereophonic receivers involving sideband separation at IF frequency |
| US4159396A (en) * | 1977-09-27 | 1979-06-26 | Motorola, Inc. | AM stereo receiver having signal-controlled corrector |
| US4159398A (en) * | 1977-09-27 | 1979-06-26 | Motorola, Inc. | Stereo presence signal for an AM stereo system |
| US4170716A (en) * | 1977-10-14 | 1979-10-09 | Motorola, Inc. | AM stereo receiver with correction limiting |
| US4164623A (en) * | 1977-11-17 | 1979-08-14 | Motorola, Inc. | AM stereo receiver with improved correction signals |
| US4225751A (en) * | 1978-12-18 | 1980-09-30 | Harris Corporation | Variable-angle, multiple channel amplitude modulation system |
| US4255751A (en) * | 1979-11-20 | 1981-03-10 | Georgia Tech Research Institute | Feed mechanism for a geodesic lens |
| US4249039A (en) * | 1980-03-31 | 1981-02-03 | Fisher Charles B | Dual-modulation receiving apparatus |
-
1981
- 1981-03-20 US US06/245,800 patent/US4368356A/en not_active Expired - Fee Related
-
1982
- 1982-03-01 EP EP19820901198 patent/EP0074386A4/en not_active Withdrawn
- 1982-03-01 JP JP57501242A patent/JPS58500346A/ja active Granted
- 1982-03-01 WO PCT/US1982/000254 patent/WO1982003304A1/en not_active Application Discontinuation
- 1982-03-05 CA CA000397697A patent/CA1166317A/en not_active Expired
- 1982-03-12 MX MX191790A patent/MX151126A/es unknown
- 1982-03-17 AR AR288780A patent/AR228087A1/es active
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58500346A (ja) | 1983-03-03 |
| EP0074386A4 (en) | 1983-10-26 |
| AR228087A1 (es) | 1983-01-14 |
| CA1166317A (en) | 1984-04-24 |
| US4368356A (en) | 1983-01-11 |
| EP0074386A1 (en) | 1983-03-23 |
| MX151126A (es) | 1984-10-03 |
| WO1982003304A1 (en) | 1982-09-30 |
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