Patent US1450966A successfully refreshed from Google Patents.
US4030040A
Expired / Lapsed
US
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Received signal selecting system
Assignee: RCA Corp
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Filing: 1975-12-30
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Granted: 1977-06-14
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Expires: 1995-12-30
Abstract
Abstract A system, which selects the most desired signal from similar signals provided by two or more radio receivers, includes a signal quality detector and a comparator for each of the signals. Each detector provides an output signal level indicative of the quality of the signal to which that detector is responsive. A ramp signal is coupled in common to each comparator, and the comparator that first senses a detected output signal level equal to the ramp signal level causes the corresponding received signal to be gated to the output of the system.
Inventors
- 👤 Donald Duane Harbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:01
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0817; H04B7/082
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
In combination, signal quality detector means providing a separate control signal having a level indicative of the quality of each of a plurality of signals, ramp signal generating means, comparator means responsive to said control signals and to said ramp signal for providing a further control signal when the magnitudes of one of said first mentioned control signals and said ramp signal are at a given relative level, and means responsive to said further control signal and to said plurality of signals to pass that one of said plurality of signals resulting in said last-mentioned further control signal to a utilization circuit.
Claim 2
Dependent Claim
102 words
In combination, signal quality detector means providing a separate control signal having a level indicative of the quality of each of a plurality of signals, ramp signal generating means, comparator means responsive to said control signals and to said ramp signal for providing a further control signal when the magnitudes of one of said first mentioned control signals and said ramp signal are at a given relative level, and means responsive to said further control signal and to said plurality of signals to pass that one of said plurality of signals resulting in said last-mentioned further control signal to a utilization circuit.
Claim 3
Dependent Claim
52 words
The combination claimed in claim 1 and including: means responsive to the provision of said further control signal and the resulting passage of said one signal of said plurality of signals to said utilization circuit to inhibit the passage of said other signals of said plurality of signals to said utilization circuit.
Claim 4
Dependent Claim
63 words
The combination claimed in claim 1 and including: means connected to said detector means for enhancing the one of said first-mentioned control signals resulting in the provision of said further control signal by said comparator means to thereby provide priority to the particular one of said plurality of signals passed to said utilization circuit by said means responsive to said further control signal.
Claim 5
Dependent Claim
30 words
The combination claimed in claim 1 and wherein said comparator means provides said further signal when the magnitude of said one control signal and of said ramp signal are equal.
Claim 6
Dependent Claim
146 words
Means for selecting a signal from a plurality of signals, comprising: a separate signal quality detector respectively responsive to each of said signals for providing a level signal indicative of signal quality, a separate selection gate responsive to each of said signals with the outputs of said gates being connected in common to a utilization circuit, a generator for periodically providing a ramp signal which lineary changes in magnitude as a function of time, a separate comparator coupled to each of said quality detectors and responsive to said ramp signal for providing a control signal when the magnitudes of the level signal and ramp signal are at a given relative level, and means responsive to said control signal for causing the selection gate corresponding to the comparator providing the control signal to couple the signal to which that selection gate is responsive to said utilization circuit.
Claim 7
Dependent Claim
146 words
Means for selecting a signal from a plurality of signals, comprising: a separate signal quality detector respectively responsive to each of said signals for providing a level signal indicative of signal quality, a separate selection gate responsive to each of said signals with the outputs of said gates being connected in common to a utilization circuit, a generator for periodically providing a ramp signal which lineary changes in magnitude as a function of time, a separate comparator coupled to each of said quality detectors and responsive to said ramp signal for providing a control signal when the magnitudes of the level signal and ramp signal are at a given relative level, and means responsive to said control signal for causing the selection gate corresponding to the comparator providing the control signal to couple the signal to which that selection gate is responsive to said utilization circuit.
Claim 8
Dependent Claim
14 words
The combination of claim 5 wherein said given relative level is the same level.
Claim 9
Dependent Claim
21 words
The combination of claim 5 including means responsive to said control signal from said comparator for inhibiting the non-corresponding selection gates.
Claim 10
Dependent Claim
13 words
The combination of claim 5 wherein said ramp signal linearly increases with time.
Claim 11
Dependent Claim
20 words
The combination of claim 5 wherein said signal quality detector provides a signal level that decreases with improved signal quality.
Claim 12
Dependent Claim
69 words
The combination of claim 5 including, enhancement means for each of said quality detectors each enhancement means having an input connected to a respective one of said quality detectors and means responsive to a change in state of its corresponding selection gate to couple the signal to which it is responsive to said utilization circuit for improving the level signal of the quality detector connected with that enhancement means.
References Cited (Backward Citations)
US3328697A
Cited
US3309510A
Cited
US3916325A
Cited
US3403341A
Cited
US3495175A
Cited
US3860872A
Cited
US3729682A
Cited
US3758867A
Cited
US3831095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |