US3764992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Program-variable clock pulse generator
Assignee: AT&T Inc
•
Filing: 1972-02-14
•
Granted: 1973-10-09
•
Expires: 1992-02-14
Abstract
Abstract A binary coded character is decoded to enable one of a plurality of AND gates that are respectively actuated by outputs of different monostable multivibrators, each having a different predetermined reset delay time. The selected gate output is further delayed and then utilized to retrigger the multivibrators simultaneously and to initiate the supplying of a new character for decoding. The composite outputs of the selected gates comprise a train of pulses having a recurrence rate that varies in accordance with the information content of a succession of the aforementioned binary coded characters.
Inventors
- 👤 D Milne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:59
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/04; G06F1/08; H; H03; H03K; H03K3/00; H03K3/64; H03K3/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
In combination, means, responsive to an initiating signal, for generating a set of pulses having leading edges occurring at different predetermined times, an output connection, means for coupling a selectable one pulse of said set of pulses to said output connection, and means for applying said one pulse at said output connection to said generating means as said initiating signal for initiating the generation of a new set of said pulses.
Claim 2
Dependent Claim
71 words
In combination, means, responsive to an initiating signal, for generating a set of pulses having leading edges occurring at different predetermined times, an output connection, means for coupling a selectable one pulse of said set of pulses to said output connection, and means for applying said one pulse at said output connection to said generating means as said initiating signal for initiating the generation of a new set of said pulses.
Claim 3
Dependent Claim
69 words
The combination in accordance with claim 1 in which said coupling means comprises means for producing a succession of selection signals specifying said one pulse of each set of pulses for coupling to said output connection, gating means, responsive to said selection signals, for selecting said one pulse, and means for applying a pulse at said output connection to actuate said producing means to produce a new selection signal.
Claim 4
Dependent Claim
89 words
The combination in accordance with claim 1 in which said generating means comprises a plurality of monostable multivibrators having different reset delay times, means responsive to said applying means for simultaneously triggering all of said multivibrators to their unstable set state, and plural pulse generators, each responsive to the resetting of a different one of said monostable multivibrators to its stable state for producing a pulse of a predetermined standard configuration, said standard pulses resulting from one simultaneous triggering of said multivibrators comprising one of said sets of pulses.
Claim 5
Dependent Claim
71 words
The combination in accordance with claim 1 in which said coupling means comprises means for selecting a pulse from each set of said pulses, means, responsive to a pulse selected by said selecting means, for controllably inhibiting operation of said generating means, and means for delaying by a predetermined interval the coupling of selected pulses to said inhibiting means, said interval being sufficient to allow operation of said controllable inhibiting means.
Claim 6
Dependent Claim
76 words
The combination in accordance with claim 1 in which said coupling means comprises data processing means for making predetermined tests, each producing one of at least two different test result signals, means for clocking said processing means by pulses in said output connection, means responsive to a predetermined result signal from said processing means for inhibiting the coupling of pulses to said output connection, and means for restarting the coupling of pulses to said output connection.
Claim 7
Dependent Claim
59 words
The combination in accordance with claim 5 in which a delay circuit is coupled between said generating means and said inhibiting means, and said delay circuit subjects signals transmitted therethrough to a sufficient delay to allow completion of said test in response to a first output connection pulse before a newly selected generating means pulse reaches said inhibiting means.
Claim 8
Dependent Claim
66 words
The combination in accordance with claim 2 in whicH said coupling means further comprises means for controllably inhibiting the coupling of said one pulse to said output connection and thereby inhibiting operation of said generating means, and means for delaying by a predetermined interval the coupling of said one pulse to said inhibiting means, said interval being sufficient to allow operation of said controllable inhibiting 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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |