US3794841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light coupling data transfer system
Assignee: Kontron Inc
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Filing: 1972-07-25
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Granted: 1974-02-26
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Expires: 1992-07-25
Abstract
Abstract A system especially for use in accurately transmitting patient derived data comprising a light coupling unit employed for patient isolation purposes, a modulating unit for generating a constant amplitude switching waveform of a frequency higher than the patient derived data having zero crossings which are modulated thereby to drive the light coupling unit between an on and off state, and a demodulating unit connected from the light coupling unit for demodulating the zero crossing information derived to essentially recover the patient derived data.
Inventors
- 👤 L Cosentino
- 👤 P Bove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:26
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/80; H04B10/801; H04B10/802; Y; Y10; Y10S; Y10S128/00; Y10S128/908
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
A system for transmitting signals substantially representative of a given data bearing input waveform comprising: light coupling means for providing isolation between an input signal and an output signal; modulating means including comparator means having threshold settings, for generating a constant amplitude switching waveform of a higher frequency than the input waveform, having zero crossings determined by the threshold settings, which are modulated by the input waveform to provide a pulse width modulated signal to switch the light coupling means between an on and off state; and said modulating means including feedback means for supplying to said comparator means a signal which is a function of the modulated switching waveform; demodulating means responsive to said light coupling means, for demodulating the zero crossing information derived, to essentially recover the original data bearing waveform.
Claim 2
Independent Claim
133 words
A system for transmitting signals substantially representative of a given data bearing input waveform comprising: light coupling means for providing isolation between an input signal and an output signal; modulating means including comparator means having threshold settings, for generating a constant amplitude switching waveform of a higher frequency than the input waveform, having zero crossings determined by the threshold settings, which are modulated by the input waveform to provide a pulse width modulated signal to switch the light coupling means between an on and off state; and said modulating means including feedback means for supplying to said comparator means a signal which is a function of the modulated switching waveform; demodulating means responsive to said light coupling means, for demodulating the zero crossing information derived, to essentially recover the original data bearing waveform.
Claim 3
Dependent Claim
18 words
A system according to claim 1 whereby said modulating means operates as a saturating phase shift type oscillator.
Claim 4
Dependent Claim
48 words
A system according to claim 2 wherein said modulating means comprises: push-pull switching output stage means connected from said comparator means; and said feedback means includes integrator means and low pass filter means connected from the switching output stage means back to an input of said comparator means.
Claim 5
Dependent Claim
41 words
A system according to claim 3 whereby said demodulating means comprises: limiter means second push-pull switching output stage means connected from said limiter means; integrator means connected from said second push-pull stage means; and filter means connected from said integrator means.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |