JPS6437139A - Stereo demodulating circuit - Google Patents
Stereo demodulating circuitInfo
- Publication number
- JPS6437139A JPS6437139A JP62193182A JP19318287A JPS6437139A JP S6437139 A JPS6437139 A JP S6437139A JP 62193182 A JP62193182 A JP 62193182A JP 19318287 A JP19318287 A JP 19318287A JP S6437139 A JPS6437139 A JP S6437139A
- Authority
- JP
- Japan
- Prior art keywords
- subcarrier
- switching signal
- frequency
- frequency dividing
- phase
- 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.)
- Pending
Links
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Stereo-Broadcasting Methods (AREA)
Abstract
PURPOSE:To obtain a stable switching signal throughout a wide temperature range by generating the switching signal synchronized with a subcarrier by a PLL circuit in the polar system. CONSTITUTION:In a frequency dividing means 13 of a PLL circuit 14, the output of a voltage controlled oscillator 4 which generates four fold subcarrier frequency is divided in a first frequency dividing circuit 5 by 1/2 and is divided in a second frequency dividing circuit 6 by 1/4. A phase shifter 7 generates a first switching signal whose frequency and phase coincide with those of the subcarrier and a second switching signal which has the same frequency as the subcarrier and has a phase dif ferent from the subcarrier by 180 deg. on the basis of outputs of frequency dividing circuits 5 and 6. Since analog switches 8 and 9 receive first and second switching signals and are turned on/off, they are accurately turned on/off in positive/negative half cycles of the subcarrier.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193182A JPS6437139A (en) | 1987-07-31 | 1987-07-31 | Stereo demodulating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193182A JPS6437139A (en) | 1987-07-31 | 1987-07-31 | Stereo demodulating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6437139A true JPS6437139A (en) | 1989-02-07 |
Family
ID=16303669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62193182A Pending JPS6437139A (en) | 1987-07-31 | 1987-07-31 | Stereo demodulating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6437139A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8594234B2 (en) | 2007-08-10 | 2013-11-26 | Koninklijke Philips N.V. | Multiple transmission apparatus with reduced coupling |
JP2015002405A (en) * | 2013-06-14 | 2015-01-05 | スパンション エルエルシー | Noise detection circuit and reception circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4846201A (en) * | 1971-10-13 | 1973-07-02 | ||
JPS4962003A (en) * | 1972-09-13 | 1974-06-15 |
-
1987
- 1987-07-31 JP JP62193182A patent/JPS6437139A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4846201A (en) * | 1971-10-13 | 1973-07-02 | ||
JPS4962003A (en) * | 1972-09-13 | 1974-06-15 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8594234B2 (en) | 2007-08-10 | 2013-11-26 | Koninklijke Philips N.V. | Multiple transmission apparatus with reduced coupling |
JP2015002405A (en) * | 2013-06-14 | 2015-01-05 | スパンション エルエルシー | Noise detection circuit and reception circuit |
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