Method and system for adjusting replacement component characteristics

• US 5,706,215 A
• Filed: 06/30/1995
• Issued: 01/06/1998
• Est. Priority Date: 06/30/1995
• Status: Expired due to Term

• Current Assignee: Harris Stratex Networks, Inc.
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: McNeill, Willis, Lindgren, G., Garner, Charles Leland, Woolley, Bradford Gillette
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): WALDER, STEPHEN JOSEPH
• Application Number:
  US08/497,074
• Time in Patent Office: 921 Days
• Field of Search: 364/571.01, 364/424.039, 364/424.034, 364/424.038, 364/424.04, 364/425, 364/571.03, 364/571.02, 364/571.04, 364/571.05 , 364/571.06, 364/571.07, 364/571.08, 73/116
• US Class Current: 702/57
• CPC Class Codes: H03G 3/00 Gain control in amplifiers or frequency changers
• CPC Class Codes: H04B 1/26 for superheterodyne receivers multiple frequency-changing H03D7/16

Abstract

A method and system for adjusting the gain of an output from a replacement component in a system with plural components responsive to changing operating conditions so that a power level of an output from the system is approximately the same as a power level of an output from the system before installation of the replacement component. A system memory stores a relationship of gain responsive to changing operating conditions for each of plural components in the system, and each replacement component has a component memory for storing a relationship of gain responsive to changing operating conditions. The relationship stored in the component memory is copied to the system memory when the replacement component is installed in the system. A feedback voltage for adjusting the gain of the output from the replacement component is varied in response to the relationships stored in the system memory so that the power level of the output from the system is substantially unchanged by installation of the replacement component.

Claims

1. In a system having a plurality of interactive components and a memory, a method of adjusting operating characteristics of a replacement component so that the operating characteristics of the replacement component approximate corresponding operating characteristics of a component replaced by the replacement component, the method comprising the steps of:

(a) storing in a system memory operating characteristics of each of a plurality of components;

(b) providing a replacement component with a component memory for storing operating characteristics of the replacement component;

(c) replacing a first one of the plurality of components with the replacement component;

(d) providing the operating characteristics of the replacement component from the component memory to the system memory; and

(e) adjusting a control signal for operating the replacement component responsive to the operating characteristics of the replacement component so that the replacement component operating characteristics approximate those of the first one of the components.

2. The method of claim 1 wherein the system is an RF communication system, and wherein the operating characteristics comprise the relationship of gain to frequency and component temperature, and wherein the control signal is a feedback voltage.

3. The method of claim 2 further comprising the step of referring to the operating characteristics of the first of the components and the replacement component stored in the system memory to adjust a feedback voltage for the replacement component so that the relationship of gain to temperature and frequency for the replacement component is same as for the first of the components.

4. The method of claim 3 wherein the first one of the components is one of a low noise coupler and an intermediate frequency amplifier.

5. The method of claim 1 further comprising the step of providing an output of a predetermined power level from the system, and wherein the adjustment of the control signal maintains the predetermined power level when the replacement component is operating in the system.

6. The method of claim 5 wherein the replacement component has a gain that effects the predetermined power level, and further comprising the step of adjusting a feedback voltage in the replacement component so that the gain of the replacement component is the same as a gain of the first one of the components for similar operating characteristics.

7. A method of adjusting a gain of an output from a replacement component in a system with plural components responsive to changing operating conditions so that a power level of an output from the system is approximately the same as a power level of an output from the system before installation of the replacement component, the method comprising the steps of:

(a) storing in a system memory a relationship of gain to changing operating conditions for each of plural components in the system;

(b) providing a replacement component for one of the plural components with a component memory for storing a relationship of gain to changing operating conditions for the replacement component;

(c) providing the relationship stored in the component memory to the system memory when the replacement component is installed in the system; and

(d) adjusting a control signal for the replacement component responsive to the relationships stored in the system memory so that the power level of the output from the system is substantially unchanged by installation of the replacement component.

8. A system for adjusting operating characteristics of a replacement component so that the operating characteristics of the replacement component approximate corresponding operating characteristics of a component replaced by the replacement component, the system comprising:

a plurality of interactive components;

a system memory for storing operating characteristics of each of said plurality of components;

a replacement component with a component memory for storing operating characteristics of said replacement component, said replacement component for replacing one of said plurality of components;

means for providing the operating characteristics of said replacement component from said component memory to said system memory when said replacement component replaces one of said plurality of components; and

means for adjusting a control signal for operating said replacement component responsive to the operating characteristics of said replacement component so that said replacement component operating characteristics approximate those of the one of said plurality of components replaced by said replacement component.

9. The system of claim 8 wherein the system is an RF communication system, and wherein the operating characteristics comprise the relationship of frequency and component temperature to component gain, and wherein said control signal is a feedback voltage.

10. The system of claim 9 wherein said plurality of components comprise at least one of a low noise coupler and an intermediate frequency amplifier.

11. An RF communication system for receiving an RF signal and converting the received signal to an intermediate frequency at a predetermined power level, the system comprising:

a low noise coupler and an intermediate frequency amplifier connected in series, each having a gain that is responsive to a feedback voltage and which affects the predetermined power level;

a system memory for storing a relationship of gain to an operating condition as a function of feedback voltage for each of said low noise coupler and said intermediate frequency amplifier;

a replacement component with a component memory for storing a relationship of gain to an operating condition as a function of feedback voltage of said replacement component, said replacement component for replacing one of said low noise coupler and said intermediate frequency amplifier;

means for providing said relationship stored in said component memory to said system memory when said replacement component is installed in the system; and

means for adjusting the feedback voltage for said replacement component responsive to said relationships stored in said system memory so that the predetermined power level is substantially unchanged by installation of said replacement component.

12. The system of claim 11 wherein said system memory stores the relationship of temperature to gain for said low noise coupler and an intermediate frequency amplifier.

13. The system of claim 12 wherein said component memory stores the relationship of temperature to gain for said replacement component.

14. The system of claim 11 wherein said system memory stores the relationship of frequency to gain for said low noise coupler, and wherein said component memory stores the relationship of frequency to gain for said replacement component that is to replace said low noise coupler.