Method of adjusting circuit components

• US 4,300,196 A
• Filed: 09/15/1975
• Issued: 11/10/1981
• Est. Priority Date: 09/15/1975
• Status: Expired due to Term

• Current Assignee: AT&T, Inc.
• Original Assignee: Western Electric Co., Inc. (Nokia Corporation)
• Inventors: Lopresti, Philip V.
• Primary Examiner(s): Krass, Errol A.
• Application Number:
  US05/613,674
• Time in Patent Office: 2,248 Days
• Field of Search: 235/151.31, 235/150, 235/152, 444/1, 340/172.5, 364/489, 364/481-483, 364/579
• US Class Current: 716/107
• CPC Class Codes: H01C 17/262 by electrolytic treatment, e.g. anodic oxydation

Abstract

Disclosed are methods of controlling the adjustment of a machine-adjustable component in a circuit wherein a feedback factor relates a change in a monitor parameter to a compensating change in the value of the adjustable component; and wherein, by machine means, a value for the change in the monitor parameter is determined, a target value for the adjustable component is calculated from the monitor parameter change and the feedback factor, and the adjustable component is adjusted to substantially its target value.

Claims

1. A method for controlling the adjustment of a plurality of machine-adjustable components in a circuit, the method comprising:

(a) determining any change from a design value of a circuit monitor parameter, which parameter expresses a characteristic of the circuit;

(b) calculating a target value for a first one of said machine-adjustable components using;

(i) the circuit monitor parameter change determined in step (a); and

(ii) a predetermined feedback factor which relates the change from design value in the circuit monitor parameter to a compensating change from the design value in the adjustable component;

(c) adjusting a first one of the adjustable components towards the target value determined for said component in step (b); and

(d) repeating steps (a) through (c) for each adjustable component whereby the adjustments to all priorly adjusted components are taken into account in subsequent component adjustments.

2. The method of claim 1 wherein the circuit further includes a fixed component;

step (a) further comprises;

(e) calculating a sensitivity factor which converts change from design value in the fixed component to a compensating change from design value in the circuit monitor parameter; and

step (b) comprises;

(f) measuring the value of the fixed component, and

(g) calculating the value for the change in the circuit monitor parameter using at least the measured and design values of the fixed component measured in step (f) and the sensitivity factor calculated in step (e).

3. The method of claim 1 wherein the circuit is operating, the circuit monitor parameter compares an input signal of the circuit to an output signal of the circuit, and step (b) comprises directly measuring the circuit monitor parameter and calculating the change between the measured and design values of the circuit monitor parameter.

4. The method of claim 3 wherein the circuit monitor parameter is gain at a selected frequency.

5. The method of claim 3 wherein the circuit monitor parameter is phase shift at a selected frequency.

6. The method of claim 3 wherein step (c) comprises expressing the target value of the adjustable component as a target value for another circuit monitor parameter comparing an input signal of the circuit to an output signal of the circuit, and step (d) comprises adjusting the adjustable component until the other circuit monitor parameter reaches its target value.

7. For use with a circuit having a fixed component and a plurality of machine-adjustable components, a method of controlling the adjustment of the adjustable components, which comprises:

in a preliminary computing step;

(a) calculating a sensitivity factor by comparing a change from design value in the fixed and the adjustable components to a change from design value in a circuit monitor parameter, which expresses a characteristic of the circuit;

(b) determining a feedback factor which converts a desired change in the circuit monitor parameter to an equivalent change from design value in each of the adjustable components;

by machine means;

(c) measuring the value of the fixed component;

(d) calculating a value for the change in the circuit monitor parameter using the measured and design values of the fixed component measured in step (c) and the sensitivity factor calculated in step (a);

(e) calculating a target value for a first one of the adjustable components using the circuit monitor parameter change calculated in step (d), the feedback factor determined in step (b), and the design value for the first adjustable component;

(f) adjusting the first one of the adjustable components towards its target value; and

(g) repeating steps (e) and (f) for each adjustable component whereby the adjustments to all priorly adjusted components are taken into account in subsequent component adjustments.

8. The method of claim 7 wherein the circuit monitor parameter is a transfer-function coefficient of the circuit.

9. For use with a circuit having a fixed component and a plurality of machine-adjustable components, a method of controlling the adjustment of the adjustable components, which comprises:

in a preliminary computing step;

(a) for each component, calculating a sensitivity factor by converting a change from design value in that component to a compensating change from design value in a circuit monitor parameter expressing a characteristic of the circuit;

(b) for each adjustable component, determining a feedback factor which converts a given change from design value in the circuit monitor parameter to a compensating change from design value in that adjustable component;

by machine means;

(c) measuring the value of the fixed component;

(d) initializing a value for the change in the circuit monitor parameter using at least the measured and design values of the fixed component measured in step (c) and the sensitivity factor for that component calculated in step (a);

(e) calculating a target value for one of the adjustable components using the circuit monitor parameter change, the feedback factor for that adjustable component determined in step (b), and the design value for that adjustable component;

(f) revising the circuit monitor parameter change using the design and target values for the adjustable component calculated in step (e) and the sensitivity factor for that component calculated in step (a);

(g) repeating steps (e) and (f) for each adjustable component in turn except the final adjustable component;

(h) repeating step (e) for the final adjustable component; and

(i) adjusting the adjustable components towards their target values.

10. The method of claim 9 wherein the circuit monitor parameter is a transfer-function coefficient of the circuit.

11. For use with a circuit having a fixed component and a plurality of machine-adjustable components, a method of controlling the adjustment of the adjustable components, which comprises:

in a preliminary computing step;

(a) for each component, calculating a sensitivity factor by converting a change from design value in that component to a compensating change from design value in a circuit monitor parameter expressing a characteristic of the circuit;

(b) for each adjustable component, determining a feedback factor which converts a given change in the monitor parameter to a compensating change from design value in that adjustable component;

by machine means;

(c) measuring the value of the fixed component;

(d) initializing a value for the change in the circuit monitor parameter using the measured and design values of the fixed component measured in step (c) and the sensitivity factor for that component calculated in step (a);

(e) calculating a target value for one of the adjustable components using the circuit monitor parameter change, the feedback factor for that adjustable component calculated in step (b), and the design value for that adjustable component;

(f) adjusting the adjustable component in step (e) towards its target value;

(g) measuring the adjusted value of the adjustable component changed in step (f);

(h) revising the circuit monitor parameter change using the design and measured values of the adjustable component measured in step (g) and the sensitivity factor for that component calculated in step (a); and

(i) repeating steps (e), (f), (g), and (h) for each remaining adjustable component in turn.

12. The method of claim 11 wherein the circuit monitor parameter is a transfer-function coefficient of the circuit.

13. For use with a circuit having a fixed component and a plurality of machine-adjustable components, a method of controlling the adjustment of the adjustable components, which comprises:

in a preliminary computing step;

(a) for each component, calculating a sensitivity factor by converting a change from design value in that component to a compensating change from design value in a circuit monitor parameter expressing a characteristic of the circuit;

(b) classifying the adjustable components into groups;

(c) for each adjustable component, determining a feedback factor which converts a given change in the circuit monitor parameter to a compensating change from design value in the adjustable component;

by machine means;

(d) measuring the value of the fixed component;

(e) initializing a value for the change in the circuit monitor parameter using the measured and design values of the fixed component measured in step (d) and the sensitivity factor for that component calculated in step (a);

(f) setting a group parameter change equal to the circuit monitor parameter change;

(g) calculating a target value for one of the adjustable components in a selected group using the group parameter change, the feedback factor for that adjustable component calculated in step (c), and the design value for that adjustable component;

(h) revising the group parameter change using the design and target values for the adjustable component calculated in step (g) and the sensitivity factor for that component calculated in step (a);

(i) repeating steps (g) and (h) for each adjustable component in turn in the selected group;

(j) adjusting each adjustable component in the selected group towards its target value;

(k) measuring the actual value of each adjustable component in the selected group;

(l) revising the circuit monitor parameter change using the measured and designed values of the adjustable components measured in step (k) and the sensitivity factors for those components calculated in step (a);

(m) repeating steps (f), (g), (h), (i), (j), (k), and (l) for each group in turn except the final group; and

(n) repeating steps (f), (g), (h), (i), and (j) for the final group.

14. The method of claim 13 wherein the circuit monitor parameter is a transfer-function coefficient of the circuit.

15. For use with a circuit having both machine-adjustable and non-adjustable components, a method of controlling the adjustment of the adjustable components, which comprises:

in a preliminary computing step;

(a) for each combination of component and each of a plurality of circuit monitor parameters expressing characteristics of the circuit, calculating a sensitivity factor by converting a change from design value in the component to a compensating change from design value in the circuit monitor parameter;

(b) classifying the adjustable components into groups;

(c) for each combination of circuit monitor parameter and adjustable component, determining a feedback factor which converts a given change from design value in the circuit monitor parameter to a compensating change from design value in the adjustable component;

by machine means;

(d) measuring the values of the non-adjustable components;

(e) for each combination of circuit monitor parameter and non-adjustable component, determining a value for the change in the circuit monitor parameter using at least the measured and design values of the non-adjustable component measured in step (d) and the sensitivity factor calculated in step (a) relating that parameter to that non-adjustable component;

(f) determining an accumulated circuit monitor parameter change for each circuit monitor parameter from the changes determined in step (e);

(g) for each circuit monitor parameter, setting a group parameter change equal to the accumulated circuit monitor parameter change;

(h) calculating a target value for one of the adjustable components in one of the groups using the group parameter changes, the feedback factors determined in step (c) for that adjustable component, and the design value for that adjustable component;

(i) revising the group parameter change for each parameter using the target and design values for the adjustable component calculated in step (h) and the sensitivity factors calculated in step (a) for that component;

(j) repeating steps (h) and (i) for each adjustable component in the group;

(k) adjusting each adjustable component in the group towards its target value;

(l) measuring the actual value of each adjustable component in the group;

(m) for each adjustable component in the group, revising each accumulated circuit monitor parameter change by using the measured and design values of the adjustable component measured in step (l) and the sensitivity factors calculated in step (a) relating that adjustable component to the respective circuit monitor parameters;

(n) repeating steps (g), (h), (i), (j), (k), (l), and (m) for each group in turn except the final group; and

(o) repeating steps (g), (h), (i), (j), and (k) for the final group.

16. The method of claim 15 wherein the circuit monitor parameters are transfer-function coefficients of the circuit.

17. A method of controlling the adjustment of a machine-adjustable component in an operating circuit to minimize deviations from design value in a circuit monitor parameter, the circuit monitor parameter comparing an input signal of the circuit and an output signal of the circuit, which comprises:

in a preliminary computing step;

(a) determining a feedback factor which converts a change from design value in a first circuit monitor parameter to a compensating change in value of the adjustable component,

by machine means;

(b) measuring the actual value of the first circuit monitor parameter,

(c) calculating a target value for the adjustable component using the design and measured values of the first circuit monitor parameter measured in step (b) and the feedback factor determined in step (a), and

(d) adjusting the adjustable component towards its target value.

18. The method of claim 17 wherein a change in value of the adjustable component is indicated by a change in value of a second circuit monitor parameter relating an input signal of the circuit to an output signal of the circuit, step (c) comprises calculating a target value for the second monitor parameter and step (d) comprises adjusting the adjustable component until the second monitor parameter reaches substantially its target value.

19. The method of claim 17 wherein one of the circuit monitor parameters is gain at a selected frequency.

20. The method of claim 17 wherein one of the circuit monitor parameters is phase shift at a selected frequency.