Method and system for adjusting and calibrating circuit parameters

• US 6,226,562 B1
• Filed: 09/10/1998
• Issued: 05/01/2001
• Est. Priority Date: 09/10/1998
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Philpott, Rick Allen
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): Marc, McDieunel, Marc, McDieunel
• Application Number:
  US09/150,559
• Time in Patent Office: 964 Days
• Field of Search: 700/117, 700/250, 700/275, 700/3, 700/69, 700/258, 701/25, 701/220, 324/426, 324/430, 708/823, 327/103, 327/362, 327/561, 341/118-120, 341/167
• US Class Current: 700/117
• CPC Class Codes: G11C 29/028 with adaption or trimming of parameters
• CPC Class Codes: G12B 13/00 Calibrating of instruments and apparatus calibrating of measuring instruments G01

Abstract

A method and system for calibrating analog integrated circuits. Initially, a single calibration circuit is formed integral with a group of analog integrated circuits. A control signal and a calibration signal are generated from the calibration circuit. Next, the control signal and the calibration signal are selectively coupled to an input of a particular analog integrated circuit among the group of analog integrated circuits. The particular analog integrated circuit is then selected for calibration via the control signal. An output of the particular analog integrated circuit is thereafter observed, in response to enabling the particular analog integrated circuit for calibration via the control signal, such that if an output of the particular analog integrated circuit corresponds to the calibration signal, a successful calibration of the particular analog integrated circuit is indicated, thereby permitting the single calibration circuit to generically calibrate a multitude of diverse analog integrated circuits. The output of the particular analog integrated circuit is coupled to an input of the single calibration circuit, and the calibration value is incremented until the particular analog integrated circuit is calibrated, such that upon completion of the calibration, the calibration value comprises a current calibration value associated with the particular analog integrated circuit. In addition, if the output of the particular analog integrated circuit is composed of a logically high value, then an indication is provided that the particular analog integrated circuit has been successfully calibrated.

Claims

1. A method for calibrating analog integrated circuits, said method comprising the steps of:

forming a single calibration circuit integral with a plurality of analog integrated circuits;

generating a control signal and a calibration signal from said single calibration circuit;

selectively coupling said control signal and said calibration signal to an input of a particular analog integrated circuit among said plurality of analog integrated circuits,

enabling only said particular analog integrated circuit for calibration via said control signal;

observing an output of said particular analog integrated circuit, in response to enabling said particular analog integrated circuit for calibration via said control signal, such that if an output of said particular analog integrated circuit corresponds to said calibration signal, a successful calibration of said particular analog integrated circuit is indicated; and

thereafter calibrating at least one other analog integrated circuit among said plurality of analog integrated circuits.

2. The method of claim 1 further comprising the step of:

coupling said output of said particular analog integrated circuit to an input of said single calibration circuit.

3. The method of claim 2 further comprising the step of:

incrementing said calibration value until said particular analog integrated circuit is calibrated, such that upon completion of said calibration, wherein said calibration value comprises a current calibration value associated with said particular analog integrated circuit.

4. The method of claim 1 further comprising the step of:

indicating that said particular analog integrated circuit is calibrated, if said output of said particular analog integrated circuit is composed of a logically high value.

5. The method of claim 4 further comprising the step of:

storing within a parameter memory, said current calibration value associated with said particular analog integrated circuit, in response to an indication that said particular analog circuit is calibrated.

6. The method of claim 5 further comprising the steps of:

configuring said plurality of analog integrated circuits such that each analog integrated circuit among said plurality of analog integrated circuits comprises a comparator having a tri-state output; and

generating an output of a particular analog integrated circuit from a tri-state output of a comparator within said particular analog integrated circuit.

7. The method of claim 5 further comprising the steps of:

configuring said plurality of analog integrated circuits such that each analog integrated circuit among said plurality of analog integrated circuits comprises a comparator based on a logical OR configuration; and

generating an output of a particular analog integrated circuit from said logical OR configuration of said comparator within said particular analog integrated circuit, wherein said output indicates that said particular analog integrated circuit is calibrated, if said output is composed of a logically high value.

8. A system for calibrating analog integrated circuits, said system comprising:

means for forming a single calibration circuit integral with a plurality of analog integrated circuits;

means for generating a control signal and a calibration signal from said single calibration circuit;

means for selectively coupling said control signal and said calibration signal to an input of a particular analog integrated circuit among said plurality of analog integrated circuits,

means for enabling only said particular analog integrated circuit for calibration via said control signal;

means for observing an output of said particular analog integrated circuit, in response to enabling said particular analog integrated circuit for calibration via said control signal, such that if an output of said particular analog integrated circuit corresponds to said calibration signal, a successful calibration of said particular analog integrated circuit is indicated; and

means for thereafter calibrating at least one other analog integrated circuit among said plurality of analog integrated circuits.

9. The system of claim 8 further comprising:

means for coupling said output of said particular analog integrated circuit to an input of said single calibration circuit.

10. The system of claim 9 further comprising:

means for incrementing said calibration value until said particular analog integrated circuit is calibrated, such that upon completion of said calibration, wherein said calibration value comprises a current calibration value associated with said particular analog integrated circuit.

11. The system of claim 10 further comprising:

means for indicating that said particular analog integrated circuit is calibrated, if said output of said particular analog integrated circuit is composed of a logically high value.

12. The system of claim 11 further comprising:

means for storing within a parameter memory, said current calibration value associated with said particular analog integrated circuit, in response to an indication that said particular analog circuit is calibrated.

13. The system of claim 12 further comprising:

means for configuring said plurality of analog integrated circuits such that each analog integrated circuit among said plurality of analog integrated circuits comprises a comparator having a tri-state output; and

means for generating an output of a particular analog integrated circuit from a tri-state output of a comparator within said particular analog integrated circuit.

14. The system of claim 12 further comprising:

means for configuring said plurality of analog integrated circuits such that each analog integrated circuit among said plurality of analog integrated circuits comprises a comparator based on a logical OR configuration; and

means for generating an output of a particular analog integrated circuit from said logical OR configuration of said comparator within said particular analog integrated circuit, wherein said output indicates that said particular analog integrated circuit is calibrated, if said output is composed of a logically high value.