GB1065456A - F.m. multiplex stereophonic broadcast receiver - Google Patents
F.m. multiplex stereophonic broadcast receiverInfo
- Publication number
- GB1065456A GB1065456A GB39247/63A GB3924763A GB1065456A GB 1065456 A GB1065456 A GB 1065456A GB 39247/63 A GB39247/63 A GB 39247/63A GB 3924763 A GB3924763 A GB 3924763A GB 1065456 A GB1065456 A GB 1065456A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- diodes
- demodulator
- valves
- supplied
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D1/00—Demodulation of amplitude-modulated oscillations
- H03D1/22—Homodyne or synchrodyne circuits
- H03D1/2209—Decoders for simultaneous demodulation and decoding of signals composed of a sum-signal and a suppressed carrier, amplitude modulated by a difference signal, e.g. stereocoders
- H03D1/2218—Decoders for simultaneous demodulation and decoding of signals composed of a sum-signal and a suppressed carrier, amplitude modulated by a difference signal, e.g. stereocoders using diodes for the decoding
Abstract
1,065,456. Stereophonic radio receivers. OKI ELECTRIC INDUSTRY CO. Ltd. Oct. 4, 1963 [Oct. 15, 1962; Feb. 5, 1963], No. 39247/63. Heading H4L. A receiver for stereophonic radio signals is provided with blocking means connected between the sum and difference output circuit and the sub-carrier demodulator to prevent the generation of undesired beat signals. As shown in Fig. 3, the L-R modulated signal together with the reconstituted sub-carrier is supplied to the conventional diode demodulator 8, 9. The demodulated L-R output signal is' supplied via valves 25, 26 to resistors 16, 17 which are supplied with the demodulated L+R signal, the resulting sum and difference providing the L and R signals at the terminals 18, 19 respectively. The valves 25, 26 act as the blocking device to prevent the L + R signal from reaching the demodulator 8, 9. Transistors may be substituted for the valves 25, 26. In an alternative arrangement, Fig. 4 (not shown), diodes (31, 32, 33, 34) act as the blocking device. The positive half-cycles of the L+R signal are blocked by the diodes (33, 34) and the negative half-cycles are short-circuited to earth by the diodes (31, 32).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4555662 | 1962-10-15 | ||
| JP459563 | 1963-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1065456A true GB1065456A (en) | 1967-04-12 |
Family
ID=26338402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB39247/63A Expired GB1065456A (en) | 1962-10-15 | 1963-10-04 | F.m. multiplex stereophonic broadcast receiver |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3327059A (en) |
| DE (1) | DE1275613B (en) |
| GB (1) | GB1065456A (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3105117A (en) * | 1960-08-17 | 1963-09-24 | Loewe Opta Ag | Arrangement for receiving stereophonic transmissions |
| US3099707A (en) * | 1960-10-31 | 1963-07-30 | Gen Electric | Stereophonic system |
| NL279877A (en) * | 1961-06-19 | |||
| US3176075A (en) * | 1961-10-20 | 1965-03-30 | Electronic Instr Co Inc | Detector of multiplex stereophonic signals |
| BE628445A (en) * | 1962-02-16 | |||
| BE631463A (en) * | 1962-05-09 |
-
1963
- 1963-10-04 GB GB39247/63A patent/GB1065456A/en not_active Expired
- 1963-10-14 DE DEO9726A patent/DE1275613B/en active Pending
- 1963-10-17 US US316814A patent/US3327059A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3327059A (en) | 1967-06-20 |
| DE1275613B (en) | 1968-08-22 |
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