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Title: US4521865: Programmable function generator
[ Derwent Title ]


Country: US United States of America

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18 pages

 
Inventor: Winkler, Dean M.; New York, NY 10024
Curtis, Jeffrey B.; Silver Spring, MD 20904
Heller, Aaron J.; Troy, NY 12180

Assignee: None

Published / Filed: 1985-06-04 / 1982-05-28

Application Number: US1982000383147

IPC Code: Advanced: G06J 1/00;
Core: more...
IPC-7: G06J 1/00;

U.S. Class: Current: 708/009; 708/274;
Original: 364/608; 364/719;

Field of Search: 364/607,608,718,719,852,851 328/014,114,142

Priority Number:
1982-05-28  US1982000383147

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.

Attorney, Agent or Firm: James & Franklin ;

Primary / Asst. Examiners: Smith, Jerry; MacDonald, Allen

Maintenance Status: E1 Expired  Check current status

INPADOC Legal Status: Show legal status actions

Family: None

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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Forward References: Show 7 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (7)   |   Backward references (19)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 6pp US3529180  1970-09 Micheli   PROPORTIONING CONTROL CIRCUIT
Get PDF - 4pp US3535555  1970-10 Heimer   RAMP FUNCTION GENERATOR HAVING VOLTAGE CONTROLLED SLOPE
Get PDF - 8pp US3548318  1970-12 Yorksie   RAMP FUNCTION GENERATOR
Get PDF - 6pp US3550020  1970-12 Gill et al.   FUNCTION GENERATOR
Get PDF - 21pp US3557347  1971-01 Robertson  Zeltex, Inc. DIGITALLY CONTROLLED ANALOGUE FUNCTION GENERATOR
Get PDF - 4pp US3657588  1972-04 McRae  Varian Associates ENVELOPE STRUCTURE FOR HIGH INTENSITY THREE ELECTRODE ARC LAMPS INCORPORATING HEAT SHIELDING MEANS
Get PDF - 14pp US3662160  1972-05 Hoppes  Weston Instrument, Inc. ARBITRARY FUNCTION GENERATOR
Get PDF - 4pp US3678698  1972-07 Gelbard et al.  General Electric Co. SIDE-BY-SIDE REFRIGERATOR INCLUDING LOW COST EVAPORATOR MEANS
Get PDF - 8pp US3689754  1972-09 Le Febre  Sperry Rand Corporation FUNCTION GENERATOR
Get PDF - 5pp US3697780  1972-10 Michael et al.  Phillips Petroleum Company LIMIT CONTROL
Get PDF - 7pp US3727037  1973-04 Zorn   VARIABLE INCREMENT DIGITAL FUNCTION GENERATOR
Get PDF - 10pp US3740539  1973-06 Pace   PROGRAMMABLE FUNCTION GENERATOR
Get PDF - 6pp US3772533  1973-12 Bruckner et al.  The National Cash Register Company TRAPEZOIDAL WAVEFORM GENERATOR CIRCUIT
Get PDF - 11pp US3839648  1974-10 Pace  Tektronix, Inc. PROGRAMMABLE FUNCTION GENERATION
Get PDF - 9pp US3889198  1975-06 Lighthall et al.  GTE Automatic Electric (Canada) Ltd. Voltage waveform generator including feedback arrangement for restoring voltage to initial condition
Get PDF - 7pp US3916327  1975-10 Lampen et al.   Output circuit for a voltage-divider device
Get PDF - 7pp US3962648  1976-06 Watson, Jr.  E-Systems, Inc. Function generator
Get PDF - 7pp US3982115  1976-09 Traa  Tektronix, Inc. Electronically programmable function generator
Get PDF - 8pp US4064423  1977-12 Atkisson, Jr.  Applied Materials, Inc. Digital system and method for generating analog control signals
       
Foreign References: None

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