US3249872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for tuning indication in a receiver for am/fm-reception
Assignee: US Philips Corp
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Filing: 1963-01-07
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Granted: 1966-05-03
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Expires: 1983-01-07
Abstract
No abstract record available.
Inventors
- 👤 Krammer Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:35
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/12; H03J3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A TUNING INDICATOR CIRCUIT FOR A RECEIVER OF THE TYPE ADAPTED TO SELECTIVELY RECEIVE AMPLITUDE MODULATED SIGNALS AND FREQUENCY MODULATED SIGNALS, SAID CIRCUIT COMPRISING A SOURCE OF A FIRST DIRECT CURRENT THAT VARIES IN AMPLITUDE AS A FUNCTION OF ONLY THE RECEIVED SIGNAL STRENGTH OF AMPLITUDE MODULATED SIGNALS, A SOURCE OF A SECOND DIRECT CURRENT THAT VARIES IN AMPLITUDE AS A FUNCTION OF ONLY THE RECEIVED SIGNAL STRENGTH OF FREQUENCY MODULATED SIGNALS, CURRENT INDICATING MEANS, AND MEANS FOR CONTINUOUSLY APPLYING SAID FIRST AND SECOND DIRECT CURRENTS TO SAID CURRENT INDICATING MEANS, SAID SOURCE OF SAID FIRST DIRECT CURRENT COMPRISING AN AMPLIFIER DEVICE CONNECTED AS AN AUTOMATIC VOLUME CONTROLLED STAGE FOR AMPLIFYING UNDEMODULATED RECEIVED SIGNALS, SAID SOURCE OF SAID SECOND DIRECT CURRENT COMPRISING A FREQUENCY DEMODULATOR CONNECTED TO DEMODULATE SAID FREQUENCY MODULATED SIGNALS.
Claim 2
Dependent Claim
132 words
A TUNING INDICATOR CIRCUIT FOR A RECEIVER OF THE TYPE ADAPTED TO SELECTIVELY RECEIVE AMPLITUDE MODULATED SIGNALS AND FREQUENCY MODULATED SIGNALS, SAID CIRCUIT COMPRISING A SOURCE OF A FIRST DIRECT CURRENT THAT VARIES IN AMPLITUDE AS A FUNCTION OF ONLY THE RECEIVED SIGNAL STRENGTH OF AMPLITUDE MODULATED SIGNALS, A SOURCE OF A SECOND DIRECT CURRENT THAT VARIES IN AMPLITUDE AS A FUNCTION OF ONLY THE RECEIVED SIGNAL STRENGTH OF FREQUENCY MODULATED SIGNALS, CURRENT INDICATING MEANS, AND MEANS FOR CONTINUOUSLY APPLYING SAID FIRST AND SECOND DIRECT CURRENTS TO SAID CURRENT INDICATING MEANS, SAID SOURCE OF SAID FIRST DIRECT CURRENT COMPRISING AN AMPLIFIER DEVICE CONNECTED AS AN AUTOMATIC VOLUME CONTROLLED STAGE FOR AMPLIFYING UNDEMODULATED RECEIVED SIGNALS, SAID SOURCE OF SAID SECOND DIRECT CURRENT COMPRISING A FREQUENCY DEMODULATOR CONNECTED TO DEMODULATE SAID FREQUENCY MODULATED SIGNALS.
References Cited (Backward Citations)
US2114154A
Cited
US3090918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |