US4231099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital function generator
Assignee: Northrop Grumman Innovation Systems LLC
•
Filing: 1979-07-30
•
Granted: 1980-10-28
•
Expires: 1999-07-30
Abstract
Abstract A counter is provided to count pulses applied thereto, with the output of the counter being applied to decode circuitry which operates selection or switching circuits to connect a plurality of pulse sources, each at a different repetition rate or frequency, to the counter in a predetermined sequence and at the occurrence of predetermined counts in said counter. The desired function of time being generated is represented by the magnitude of the digital binary number in the counter.
Inventors
- 👤 Juris Stauers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:07
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/02; G06F1/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A digital function generator comprising: (a) a counter having an input for receiving pulses to be counted and a plurality of outputs; (b) switching means having a plurality of pulse inputs connected to receive pulses thereon with the pulses having a different repetition rate on each of the different inputs, an output, and a plurality of selection inputs for coupling a selected pulse input to the output in response to a signal applied to a specific selection input, the output being further connected to the input of said counter; and (c) decode means having a plurality of inputs connected to the plurality of outputs of said counter and a plurality of outputs connected to the plurality of selection inputs of said switching means for providing signals on the selection inputs in a predetermined sequence and at the occurrence of predetermined counts in said counter.
Claim 2
Dependent Claim
144 words
A digital function generator comprising: (a) a counter having an input for receiving pulses to be counted and a plurality of outputs; (b) switching means having a plurality of pulse inputs connected to receive pulses thereon with the pulses having a different repetition rate on each of the different inputs, an output, and a plurality of selection inputs for coupling a selected pulse input to the output in response to a signal applied to a specific selection input, the output being further connected to the input of said counter; and (c) decode means having a plurality of inputs connected to the plurality of outputs of said counter and a plurality of outputs connected to the plurality of selection inputs of said switching means for providing signals on the selection inputs in a predetermined sequence and at the occurrence of predetermined counts in said counter.
Claim 3
Dependent Claim
37 words
A digital function generator as claimed in claim 1 wherein the switching means includes a plurality of switches, each connecting a specific pulse input to the output in response to a signal on a specific selection input.
Claim 4
Dependent Claim
20 words
A digital function generator as claimed in claim 1 wherein the decode means includes means for altering the predetermined counts.
Claim 5
Dependent Claim
24 words
A digital function generator as claimed in claim 1 wherein the decode means includes means for altering the predetermined counts through an external input.
Claim 6
Dependent Claim
30 words
A digital function generator as claimed in claim 1 wherein the different repetition rates of the pulses and the predetermined counts are preselected to snythesize a desired function of time.
Claim 7
Dependent Claim
36 words
A digital function generator as claimed in claim 5 wherein the function of time is available at the outputs of the counter and is represented by the magnitude of the digital binary number in the counter.
References Cited (Backward Citations)
US3345505A
Cited
US3435196A
Cited
US3513301A
Cited
US3729625A
Cited
US3674999A
Cited
US3689754A
Cited
US3662160A
Cited
US3930144A
Cited
US4064423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |