US3553380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplexing system
Assignee: TDK Micronas GmbH
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Filing: 1968-10-25
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Granted: 1971-01-05
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Expires: 1988-10-25
Abstract
Abstract N voltage controlled oscillators produce N frequency multiplexed IF signals, each of which are frequency modulated by a different one of N intelligence signals when present. An intelligence signal-operated switch coupled to each of the oscillators prevent the IF signal of an associated oscillator from being coupled through an up converter to the transmitter power amplifier in the absence of intelligence signal at the input of the oscillator so that the given power output of the power amplifier is equally distributed between only the modulated IF signals.
Inventors
- 👤 Charles Greenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:23
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A multichannel multiplexing system comprising: N intelligence signal sources, where N is an integer greater than one; first means coupled to said sources to produce N frequency multiplexed intermediate frequency signals each being associated with a different one of said sources for frequency modulation thereof by an intelligence signal when present at the output of said associated source; second means to provide a given power output for transmission; and third means coupled to each of said sources, said first means and said second means responsive to the absence of intelligence signal from its associated source to prevent its associated intermediate frequency signal from being coupled to said second means, said given power of said second means thereby being equally distributed between said modulated intermediate frequency signals coupled to said second means.
Claim 2
Dependent Claim
131 words
A multichannel multiplexing system comprising: N intelligence signal sources, where N is an integer greater than one; first means coupled to said sources to produce N frequency multiplexed intermediate frequency signals each being associated with a different one of said sources for frequency modulation thereof by an intelligence signal when present at the output of said associated source; second means to provide a given power output for transmission; and third means coupled to each of said sources, said first means and said second means responsive to the absence of intelligence signal from its associated source to prevent its associated intermediate frequency signal from being coupled to said second means, said given power of said second means thereby being equally distributed between said modulated intermediate frequency signals coupled to said second means.
Claim 3
Dependent Claim
36 words
A system according to claim 1, further including fourth means coupled between the output of said third means and the input of said second means to provide frequency diversity transmission of said modulated intermediate frequency signals.
Claim 4
Dependent Claim
29 words
A system according to claim 1, further including fourth means coupled to the output of said second means to provide space diversity transmission of said modulated intermediate frequency signals.
Claim 5
Dependent Claim
25 words
A system according to claim 1, wherein said first means includes N voltage controlled oscillators, each being coupled to a different one of said sources.
Claim 6
Dependent Claim
34 words
A system according to claim 1, wherein said second means includes: limiter means coupled to said third means; and a power amplifier coupled to said limiter means, said power amplifier providing said given power.
Claim 7
Dependent Claim
61 words
A system according to claim 1, wherein said third means includes: N intelligence signal operated gate pulse generaTors each coupled to a different one of said sources; and N gated means coupled to said first means and a different one of said gate pulse generators, each of said gated means being associated with a different one of said intermediate frequency signals.
Claim 8
Dependent Claim
53 words
A system according to claim 6, wherein each of said gate pulse generators include: a positive threshold means coupled to one of said sources; a negative threshold means coupled to said one of said sources; and an OR gate coupled to said positive threshold means, said negative threshold means and said gated means.
Claim 9
Dependent Claim
26 words
A system according to claim 6, wherein said third means further includes a signal combining means coupled to the output of each of said gated means.
Claim 10
Dependent Claim
132 words
A system according to claim 1, wherein: said first means includes: N voltage controlled oscillators each being coupled to a different one of said sources; said third means include: N intelligence signal gate pulse generators each coupled to a different one of said sources; N gates means each being coupled to a different one of said gate pulse generators and a different one of said oscillators, said one of said oscillators being coupled to said one of said sources coupled to the associated one of said gate pulse generators; and a signal combining means coupled to the output of each of said gated means; and said second means includes; limiter means coupled to said combining means; and a power amplifier coupled to said limiter means, said power amplifier providing said given power.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |