US4064461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver including a station finding circuit
Assignee: US Philips Corp
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Filing: 1975-11-05
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Granted: 1977-12-20
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Expires: 1995-11-05
Abstract
Abstract A receiver employs automatic wave-range switching. The wave-range information is used to have a station finding circuit run through the unwanted wave-ranges at a fast rate and run through the desired wave-range at a comparatively slow rate. This is done by applyng counting pulses having a switchable frequency to a counter governing the finding action.
Inventors
- 👤 Gustavus Lambertus Petrus van Eijck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:11
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J7/20; H03J7/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A station finding circuit comprising a pulse generator having an output, a tuning information storage circuit including a counter having a counting signal input coupled to said generator output, a converting circuit coupled to an output circuit of the counter for converting tuning information present in the counter into wave-range information which can be derived from an output circuit of the converting circuit, a comparison circuit having inputs coupled to the output circuit of the converting circuit and an output, an operating circuit coupled to said comparison circuit, said operating circuit including a finding command switch for each wave-range, a finding speed change-over switch means coupled to said comparison circuit output for changing the frequency of the pulse generator output so that counter positions not corresponding to a selected wave-range are run through at a fast rate during a finding action and counter positions corresponding to the selected wave-range can be run through at a comparatively slow rate.
Claim 2
Dependent Claim
158 words
A station finding circuit comprising a pulse generator having an output, a tuning information storage circuit including a counter having a counting signal input coupled to said generator output, a converting circuit coupled to an output circuit of the counter for converting tuning information present in the counter into wave-range information which can be derived from an output circuit of the converting circuit, a comparison circuit having inputs coupled to the output circuit of the converting circuit and an output, an operating circuit coupled to said comparison circuit, said operating circuit including a finding command switch for each wave-range, a finding speed change-over switch means coupled to said comparison circuit output for changing the frequency of the pulse generator output so that counter positions not corresponding to a selected wave-range are run through at a fast rate during a finding action and counter positions corresponding to the selected wave-range can be run through at a comparatively slow rate.
Claim 3
Dependent Claim
38 words
A station finding circuit as claimed in claim 1, further comprising a finding direction reversal circuit means coupled to the output of the comparison ciruit for reversing the finding direction at the ends of the selected wave range.
Claim 4
Dependent Claim
17 words
A receiver as claimed in claim 2, wherein the finding direction reversal circuit can be switched off.
Claim 5
Dependent Claim
12 words
A receiver including a station finding circuit as claimed in claim 1.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |