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 Title: |
US4521865:
Programmable function generator
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Winkler, Dean M.; New York, NY 10024
Curtis, Jeffrey B.; Silver Spring, MD 20904
Heller, Aaron J.; Troy, NY 12180
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| Assignee: |
None
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| Published / Filed: |
1985-06-04
/ 1982-05-28
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| Application Number: |
US1982000383147
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| IPC Code: |
Advanced:
G06J 1/00;
Core:
more...
IPC-7:
G06J 1/00;
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| U.S. Class: |
Current:
708/009;
708/274;
Original:
364/608;
364/719;
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| Field of Search: |
364/607,608,718,719,852,851
328/014,114,142
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| Priority Number: |
| 1982-05-28 |
US1982000383147 |
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| Abstract: |
A signal consisting of a sequence of contiguous line segments is generated to simulate a function. First programmable inputs define a first parameter (duration) corresponding to each of the line segments. Control signals are generated which are representative of each of the first parameters. A reference voltage representative of a second parameter (end point) corresponding to each of the line segments is generated and stored. The output signal comprises a portion representative of each of the line segments. Each portion is generated over a period determined by the control signal corresponding to the line segment which the portion represents, has an initial value determined by the stored reference voltage corresponding to the previous line segment, and a final value determined by the reference voltage corresponding to the line segment which the portion represents.
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| Attorney, Agent or Firm: |
James & Franklin ;
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| Primary / Asst. Examiners: |
Smith, Jerry; MacDonald, Allen
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 27 claims |
We claim:
1. Apparatus for generating a signal representative of a function or the like comprising a sequence of line segments, the apparatus comprising:
- first programmable input means for defining a first parameter corresponding to each of said line segments;
- second programmable input means for generating a reference voltage representative of a second parameter corresponding to each of said line segments;
- means connected to said second programmable input means for storing said reference voltages;
- means connected to said first programmable input means for generating control signals representative of each of said first parameters; and
- means connected to said second programmable input means, said means for generating control signals, and said means for storing said reference voltages for generating an output signal comprising portions representative of each of said line segments, each of said portions being generated over a period determined by the control signal corresponding to the line segment which said portion represents and having an initial value determined by the stored reference voltage corresponding to the line segment previous to the line segment which said portion represents, and a final value determined by the reference voltage for the line segment which the portion represents, wherein said first programmable input means comprises:
- a power source;
- first variable resistance means corresponding to each of said line segments;
- analog switch means having data input means for each of said line segments, data output means, and address signal input means, each of said first resistance means being connected between said source and a different one of said data input means, said data output means being connected to said means for generating said control signal; and
- means for generating address signals, said address signal generating means being connected to said switch means address input means, and being effective to cause said switch means to select and connect one of said data input means to said data output means.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 7 U.S. patent(s) that reference this one
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