Patent US5020154A successfully refreshed from Google Patents.
US5020154A
Expired / Lapsed
US
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Transmission link
Assignee: Siemens AG
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Filing: 1990-04-19
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Granted: 1991-05-28
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Expires: 2010-04-19
Abstract
Abstract A transmission link for transmitting a sequence of signals comprising pulse and interval signals, across a transmission medium from a transmitter to a receiver circuit of a receiver, whereby each pulse signal is modulated with a frequency. At least two frequencies are used to modulate the pulses, and a separate evaluation circuit is provided in the receiver for each modulating frequency. The output signals of the evaluation circuits are concatenated (linked in series) by a AND-gate circuit.
Inventors
- 👤 Hermann Zierhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:58
CPC Classifications
G; G08; G08C; G08C23/00; G08C23/04; H; H04; H04B; H04B14/00; H04B14/02; H04B14/023
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
104 words
A transmission link for transmitting a sequence of pulses and intervals over a transmission medium comprising: a transmitter including means for modulating pulses with at least two frequencies to form modulated pulse signals containing said two frequencies; a receiver having a separate evaluation circuit corresponding to each modulation frequency, each evaluation circuit having as an input said modulated pulses and providing a demodulated output; and an AND-gate circuit, having at least two inputs, each input being coupled to a respective output of one of said evaluation circuits, whereby said AND-gate circuit concatenates the demodulated pulse signals appearing at the outputs of said evaluation circuits
Claim 2
Dependent Claim
104 words
A transmission link for transmitting a sequence of pulses and intervals over a transmission medium comprising: a transmitter including means for modulating pulses with at least two frequencies to form modulated pulse signals containing said two frequencies; a receiver having a separate evaluation circuit corresponding to each modulation frequency, each evaluation circuit having as an input said modulated pulses and providing a demodulated output; and an AND-gate circuit, having at least two inputs, each input being coupled to a respective output of one of said evaluation circuits, whereby said AND-gate circuit concatenates the demodulated pulse signals appearing at the outputs of said evaluation circuits
Claim 3
Dependent Claim
46 words
The transmission link of claim 1, wherein said means for modulating include first means for modulating each pulse signal with a first modulating frequency and second means for modulating each pulse with a second modulating frequency having a higher frequency magnitude than said first modulating frequency.
Claim 4
Dependent Claim
40 words
The transmission link of claim 2, wherein said first modulating frequency has a frequency magnitude in a range from 30 to 50 kHz and the second modulating frequency has a frequency magnitude in a range from 400 to 500 kHz.
Claim 5
Dependent Claim
49 words
The transmission link of claim 1, wherein said means for modulating include first means for modulating each pulse signal with a first modulating frequency to form a modulated pulse signal, and second and third means to modulate each modulated pulse signal alternately with a second and third modulating frequency.
Claim 6
Dependent Claim
26 words
The transmission link of claim 4, wherein said modulating means includes means to modulate each modulated pulse signal alternately with three or more additional modulating frequencies.
Claim 7
Dependent Claim
13 words
The transmission link of claim 1, wherein said transmission medium is infrared light.
Claim 8
Dependent Claim
13 words
The transmission link of claim 2, wherein said transmission medium is infrared light.
Claim 9
Dependent Claim
13 words
The transmission link of claim 3, wherein said transmission medium is infrared light.
Claim 10
Dependent Claim
13 words
The transmission link of claim 4, wherein said transmission medium is infrared light.
Claim 11
Independent Claim
64 words
A method of transmitting a sequence of pulses and intervals over a transmission medium comprising: modulating pulses with at least two frequencies to form modulated pulses containing said two frequencies; transmitting said modulated pulses over the medium; seperately receiving said modulated pulses; evaluating said pulses at each modulating frequency; and ANDing the respective results of said evaluations whereby said evaluation results will be concatenated.
Claim 12
Independent Claim
64 words
A method of transmitting a sequence of pulses and intervals over a transmission medium comprising: modulating pulses with at least two frequencies to form modulated pulses containing said two frequencies; transmitting said modulated pulses over the medium; seperately receiving said modulated pulses; evaluating said pulses at each modulating frequency; and ANDing the respective results of said evaluations whereby said evaluation results will be concatenated.
Claim 13
Dependent Claim
30 words
The method of claim 10, comprising modulating each pulse signal with a first modulating frequency and a second modulating frequency having a higher frequency magnitude than the first modulating frequency.
Claim 14
Dependent Claim
39 words
The method of claim 11, wherein said first modulating frequency has a frequency magnitude in a range from 30 to 50 kHz and the second modulating frequency has a frequency magnitude in a range from 400 to 500 kHz.
Claim 15
Dependent Claim
36 words
The method of claim 10, comprising modulating each pulse signal with a first modulating frequency to form a modulated pulse signal, and further modulating each modulated pulse signal alternately with a second and third modulating frequency.
Claim 16
Dependent Claim
19 words
The method of claim 13, comprising modulating each modulated pulse signal alternately with three or more additional modulating frequencies.
Claim 17
Dependent Claim
12 words
The method of claim 10, wherein said transmission medium is infrared light.
Claim 18
Dependent Claim
12 words
The method of claim 11, wherein said transmission medium is infrared light.
Claim 19
Dependent Claim
12 words
The method of claim 12, wherein said transmission medium is infrared light.
Claim 20
Dependent Claim
13 words
The transmission link of claim 13, wherein said transmission medium is infrared light.
References Cited (Backward Citations)
US2952812A
Cited
US3956626A
Cited
US4150284A
Cited
US4442528A
Cited
US4627105A
Cited
US4928318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |