US3590143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound signal amplifier for color television receiver
Assignee: Hitachi Ltd
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Filing: 1968-04-10
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Granted: 1971-06-29
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Expires: 1988-04-10
Abstract
Abstract A sound signal amplifier circuit for a color television receiver, including a carrier chrominance signal amplifier and sound intermediate frequency signal amplifier for respectively amplifying a carrier chrominance signal and a sound intermediate frequency signal which are obtained by separating and detecting the output of a tuner for converting a high frequency television signal to an intermediate frequency signal, wherein said sound intermediate frequency signal is commonly amplified in said carrier chrominance signal amplifier, and its level is controlled in accordance with that of the carrier chrominance signal.
Inventors
- 👤 Sho Narita
- 👤 Masanori Ogino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:50
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/68
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
A signal-processing circuit for use with a color television receiver, comprising: 1. means for converting a high frequency color television signal to an intermediate frequency signal containing a luminance signal component, chrominance signal component and sound signal component; 2. means connected with said converting means for amplifying and detecting the luminance signal component and chrominance signal component of said intermediate frequency signal; 3. means for taking out the luminance signaL connected with said means for amplifying and detecting the luminance signal component and chrominance signal component; and 4. a cascaded circuit connected with said converting means and to which is applied said intermediate frequency signal, said cascaded circuit including at least (a) means for detecting said sound signal component, (b) means for summing the detected sound signal component and the detected chrominance signal component and (c) an amplifier for amplifying the output of said summing means; and further including 5. means for detecting the color burst level of the carrier chrominance signal and means for automatically controlling the gain of the amplifier for amplifying the output of said summing means in accordance with the color burst level of the carrier chrominance signal.
Claim 2
Dependent Claim
192 words
A signal-processing circuit for use with a color television receiver, comprising: 1. means for converting a high frequency color television signal to an intermediate frequency signal containing a luminance signal component, chrominance signal component and sound signal component; 2. means connected with said converting means for amplifying and detecting the luminance signal component and chrominance signal component of said intermediate frequency signal; 3. means for taking out the luminance signaL connected with said means for amplifying and detecting the luminance signal component and chrominance signal component; and 4. a cascaded circuit connected with said converting means and to which is applied said intermediate frequency signal, said cascaded circuit including at least (a) means for detecting said sound signal component, (b) means for summing the detected sound signal component and the detected chrominance signal component and (c) an amplifier for amplifying the output of said summing means; and further including 5. means for detecting the color burst level of the carrier chrominance signal and means for automatically controlling the gain of the amplifier for amplifying the output of said summing means in accordance with the color burst level of the carrier chrominance signal.
Claim 3
Dependent Claim
23 words
means connected with said converting means for amplifying and detecting the luminance signal component and chrominance signal component of said intermediate frequency signal;
Claim 4
Dependent Claim
23 words
means connected with said converting means for amplifying and detecting the luminance signal component and chrominance signal component of said intermediate frequency signal;
Claim 5
Dependent Claim
24 words
means for taking out the luminance signaL connected with said means for amplifying and detecting the luminance signal component and chrominance signal component; and
Claim 6
Dependent Claim
24 words
means for taking out the luminance signaL connected with said means for amplifying and detecting the luminance signal component and chrominance signal component; and
Claim 7
Dependent Claim
61 words
a cascaded circuit connected with said converting means and to which is applied said intermediate frequency signal, said cascaded circuit including at least (a) means for detecting said sound signal component, (b) means for summing the detected sound signal component and the detected chrominance signal component and (c) an amplifier for amplifying the output of said summing means; and further including
Claim 8
Dependent Claim
61 words
a cascaded circuit connected with said converting means and to which is applied said intermediate frequency signal, said cascaded circuit including at least (a) means for detecting said sound signal component, (b) means for summing the detected sound signal component and the detected chrominance signal component and (c) an amplifier for amplifying the output of said summing means; and further including
Claim 9
Dependent Claim
42 words
means for detecting the color burst level of the carrier chrominance signal and means for automatically controlling the gain of the amplifier for amplifying the output of said summing means in accordance with the color burst level of the carrier chrominance signal.
Claim 10
Dependent Claim
42 words
means for detecting the color burst level of the carrier chrominance signal and means for automatically controlling the gain of the amplifier for amplifying the output of said summing means in accordance with the color burst level of the carrier chrominance signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |