US3242433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uhf adaptor for vhf television receivers
Assignee: RCA Corp
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Filing: 1962-08-13
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Granted: 1966-03-22
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Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 David J Carlson
- 👤 John B Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:27
CPC Classifications
H; H03; H03D; H03D7/00; H03J; H03J5/00; H03J5/24; H03J5/242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A UHF ADAPTER CIRCUIT FOR A TELEVISION RECEIVER OF THE TYPE INCLUDING A VHF TUNER FOR CONVERTING ANY ONE OF A PLURALITY OF VHF SIGNALS TO AN INTERMEDIATE FREQUENCY SIGNAL, SAID VHF TUNER INCLUDING A RADIO FREQUENCY AMPLIFIER, SAID TELEVISION RECEIVER ALSO INCLUDING AN INTERMEDIATE FREQUENCY AMPLIFIER FOR AMPLIFYING SAID INTERMEDIATE FREQUENCY SIGNAL, A HIGH IMPEDANCE AUTOMATIC GAIN CONTROL CIRCUIT COUPLED TO SAID INTERMEDIATE FREQUENCY AMPLIFIER FOR DEVELOPING A GAIN CONTROL VOLTAGE, AND MEANS FOR APPLYING SAID GAIN CONTROL VOLTAGE TO SAID RADIO FREQUENCY AMPLIFIER TO CONTROL THE GAIN THEREOF, SAID UHF ADAPTOR CIRCUIT COMPRISING IN COMBINATION: A UHF TUNER FOR SELECTING ANY ONE OF A PLURALITY OF UHF TELEVISION SIGNALS AND CONVERTING SAID UHF SIGNAL TO SAID INTERMEDIATE FREQUENCY SIGNAL, MEANS FOR ADAPTING SAID TELEVISION RECEIVER TO SELECTIVELY RECEIVE ONE OF SAID UHF AND SAID VHF SIGNALS, A TRANSISTOR INTERMEDIATE FREQUENCY PREAMPLIFIER COUPLED TO SAID UHF TUNER TO AMPLIFY SAID INTERMEDIATE FREQUENCY SIGNAL, MEANS FOR CONVERTING SAID RADIO FREQUENCY AMPLIFIER TO OPERATE AS A DIRECT VOLTAGE AMPLIFIER FOR SAID AUTOMATIC GAIN CONTROL VOLTAGE DURING UHF SIGNAL RECEPTION, AND MEANS FOR APPLYING SAID AMPLIFIED AUTOMATIC GAIN CONTROL VOLTAGE TO SAID TRANSISTOR PREAMPLIFIER TO AUTOMATICALLY CONTROL THE GAIN OF SAID PREAMPLIFIER.
Claim 2
Dependent Claim
200 words
A UHF ADAPTER CIRCUIT FOR A TELEVISION RECEIVER OF THE TYPE INCLUDING A VHF TUNER FOR CONVERTING ANY ONE OF A PLURALITY OF VHF SIGNALS TO AN INTERMEDIATE FREQUENCY SIGNAL, SAID VHF TUNER INCLUDING A RADIO FREQUENCY AMPLIFIER, SAID TELEVISION RECEIVER ALSO INCLUDING AN INTERMEDIATE FREQUENCY AMPLIFIER FOR AMPLIFYING SAID INTERMEDIATE FREQUENCY SIGNAL, A HIGH IMPEDANCE AUTOMATIC GAIN CONTROL CIRCUIT COUPLED TO SAID INTERMEDIATE FREQUENCY AMPLIFIER FOR DEVELOPING A GAIN CONTROL VOLTAGE, AND MEANS FOR APPLYING SAID GAIN CONTROL VOLTAGE TO SAID RADIO FREQUENCY AMPLIFIER TO CONTROL THE GAIN THEREOF, SAID UHF ADAPTOR CIRCUIT COMPRISING IN COMBINATION: A UHF TUNER FOR SELECTING ANY ONE OF A PLURALITY OF UHF TELEVISION SIGNALS AND CONVERTING SAID UHF SIGNAL TO SAID INTERMEDIATE FREQUENCY SIGNAL, MEANS FOR ADAPTING SAID TELEVISION RECEIVER TO SELECTIVELY RECEIVE ONE OF SAID UHF AND SAID VHF SIGNALS, A TRANSISTOR INTERMEDIATE FREQUENCY PREAMPLIFIER COUPLED TO SAID UHF TUNER TO AMPLIFY SAID INTERMEDIATE FREQUENCY SIGNAL, MEANS FOR CONVERTING SAID RADIO FREQUENCY AMPLIFIER TO OPERATE AS A DIRECT VOLTAGE AMPLIFIER FOR SAID AUTOMATIC GAIN CONTROL VOLTAGE DURING UHF SIGNAL RECEPTION, AND MEANS FOR APPLYING SAID AMPLIFIED AUTOMATIC GAIN CONTROL VOLTAGE TO SAID TRANSISTOR PREAMPLIFIER TO AUTOMATICALLY CONTROL THE GAIN OF SAID PREAMPLIFIER.
References Cited (Backward Citations)
US2750496A
Cited
US2873360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |