US4405836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal equalization selector
Assignee: Motorola Solutions Inc
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Filing: 1982-01-04
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Granted: 1983-09-20
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Expires: 2002-01-04
Abstract
Abstract A combination radio and tape player is disclosed which includes a signal equalization selector wherein the audio program selection switches which select either an AM or FM radio mode or a tape player mode of operation also simultaneously select various different sets of stored control signals which implement predetermined audio signal equalization in accordance with the type of audio mode of operation (program) that was selected. This is accomplished by the use of a random access memory which stores three pluralities (sets) of control signals, each plurality of control signals corresponding to a predetermined desired equalization for either the AM, FM or tape player modes of operation of the combination radio and tape player. Manual controls are provided which allow selective adjustment of the equalization provided in any of the AM, FM or tape player modes of operation.
Inventors
- 👤 Jerome D. Meyerhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:34
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/16; H03G5/165; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
254 words
A signal equalization selector comprising: signal source selector means for selecting a first one of a plurality of signal sources for providing a desired selected signal comprising frequencies within a predetermined frequency band; equalizer means coupled to said signal source selector means for receiving said selected signal and effectively adjusting the relative emphasis of said selected signal in each of a plurality of subbands within said frequency band, the emphasis of said selected signal in each of said subbands being in accordance with an associated subband equalizer control signal received by said equalizer means for each of said subbands; memory means for storing at least a first plurality of predetermined control signals and effectively supplying said first plurality of control signals to said equalizer means as said equalizer control signals while said first one of said plurality of signal sources is selected by said signal source selector means; wherein the improvement comprises said memory means storing at least a second plurality of predetermined control signals, and wherein said signal source selector means has structure for selecting a second one of said plurality of signal sources to provide said selected signal and also simultaneously selecting, by selective coupling between said equalizer means and control signals stored in said memory means, said second plurality of control signals, instead of said first plurality of control signals, as said equalizer control signals, whereby equalization for signals derived from said first and second signal sources occurs in accordance with said first and second pluralities of stored control signals, respectively.
Claim 2
Dependent Claim
254 words
A signal equalization selector comprising: signal source selector means for selecting a first one of a plurality of signal sources for providing a desired selected signal comprising frequencies within a predetermined frequency band; equalizer means coupled to said signal source selector means for receiving said selected signal and effectively adjusting the relative emphasis of said selected signal in each of a plurality of subbands within said frequency band, the emphasis of said selected signal in each of said subbands being in accordance with an associated subband equalizer control signal received by said equalizer means for each of said subbands; memory means for storing at least a first plurality of predetermined control signals and effectively supplying said first plurality of control signals to said equalizer means as said equalizer control signals while said first one of said plurality of signal sources is selected by said signal source selector means; wherein the improvement comprises said memory means storing at least a second plurality of predetermined control signals, and wherein said signal source selector means has structure for selecting a second one of said plurality of signal sources to provide said selected signal and also simultaneously selecting, by selective coupling between said equalizer means and control signals stored in said memory means, said second plurality of control signals, instead of said first plurality of control signals, as said equalizer control signals, whereby equalization for signals derived from said first and second signal sources occurs in accordance with said first and second pluralities of stored control signals, respectively.
Claim 3
Dependent Claim
40 words
A signal equalization selector according to claim 1 wherein said equalizer means is responsive to the magnitude of each of said equalizer control signals for determining said relative emphasis of said selected signal in each of said plurality of subbands.
Claim 4
Dependent Claim
59 words
A signal equalization selector according to claim 2 wherein said signal source selector means includes at least one manual actuator for manually selecting which of at least said first and second signal sources will provide said selected signal, thereby also selecting which of said first and second pluralities of stored control signals will correspond to said equalizer control signals.
Claim 5
Dependent Claim
27 words
A signal equalization selector according to claim 3 wherein said selected signal comprises an audio entertainment signal and wherein said frequency band comprises said audio frequency band.
Claim 6
Dependent Claim
42 words
A signal equalization selector according to claim 4 which includes signal adjustment means coupled to said memory means for selectively adjusting the magnitude of each of the signals in said first and second pluralities of control signals stored in said memory means.
Claim 7
Dependent Claim
40 words
A signal equalization selector according to claim 5 wherein said signal adjusting means only provides for adjusting the magnitude of the stored control signals which are currently being selected by said selector means as corresponding to said equalizer control signals.
Claim 8
Dependent Claim
35 words
A signal equalization selector according to claim 5 wherein said manual actuator corresponds to a pushbutton switch which selects one of said first and second signal sources in accordance with actuation of said pushbutton switch.
Claim 9
Dependent Claim
88 words
A signal equalization selector according to any of claims 1, 2, 3, 4, 5 or 6 wherein said signal source selector means selectively provides a first select control signal which selects said first signal source and said first plurality of control signals as said equalizer control signals, and which selectively provides a second select control signal which selects said second signal source and said second plurality of control signals as said equalizer control signals, said selector means selectively providing one of said first and second select control signals.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |