Patent US4015144A successfully refreshed from Google Patents.
US4015144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for conversion of an analog signal into a binary signal
Assignee: US Philips Corp
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Filing: 1974-11-07
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Granted: 1977-03-29
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Expires: 1994-11-07
Abstract
Abstract A circuit arrangement in which an analog signal is converted into a binary signal with the aid of two threshold limiter circuits one of which is active near a maximum and the other is active near a minimum value of the analog signal, and with two monostable multivibrators connected thereto, followed by a set-reset flipflop. Small signal passages of the thresholds near the maximum and minimum analog signal values become clearly manifest as a signal transition in the binary signal that can be displayed.
Inventors
- 👤 Freddy Achiel Cornelius Brouckaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:37
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/08; H04; H04N; H04N1/00; H04N1/40; H04N1/403; H04N5/00; H04N5/14; G; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/1659
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
138 words
A circuit arrangement comprising input means for receiving an analog signal; two threshold limiter circuits each having a signal threshold differing from each other, an input coupled to said input means, and an output; two monostable multivibrators each coupled to both of said limiter circuit outputs and each having an output; said monostable multivibrators responding to threshold crossings of differing directions respectively, and a flipflop circuit coupled to said multivibrator outputs and having an output means for supplying a digital signal having transitions as a function of the analog signal passing said signal thresholds; whereby said circuit arrangement is operable to regard as redundant and without effect second crossings of the two thresholds in the same direction but to respond to each crossing of either threshold in a direction which differs from that of the previous threshold crossing.
Claim 2
Dependent Claim
138 words
A circuit arrangement comprising input means for receiving an analog signal; two threshold limiter circuits each having a signal threshold differing from each other, an input coupled to said input means, and an output; two monostable multivibrators each coupled to both of said limiter circuit outputs and each having an output; said monostable multivibrators responding to threshold crossings of differing directions respectively, and a flipflop circuit coupled to said multivibrator outputs and having an output means for supplying a digital signal having transitions as a function of the analog signal passing said signal thresholds; whereby said circuit arrangement is operable to regard as redundant and without effect second crossings of the two thresholds in the same direction but to respond to each crossing of either threshold in a direction which differs from that of the previous threshold crossing.
Claim 3
Dependent Claim
37 words
A circuit arrangement as claimed in claim 1, wherein each threshold limiter circuit is formed with a signal threshold located near a maximum and a minimum signal value respectively of the analog signal for checking signal irregularities.
Claim 4
Dependent Claim
35 words
A circuit arrangement as claimed in claim 1, wherein the flipflop comprises a set and a reset input one input being coupled to one multivibrator and the other input is coupled to the other multivibrator.
Claim 5
Dependent Claim
40 words
A circuit arrangement as claimed in claim 1, wherein said multivibrators can be activated by rectified signal trigger edges, and further comprising two inverter circuits coupled between one of the multivibrators to the outputs of the threshold limiter circuits respectively.
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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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |