US4647871A
Expired / Lapsed
US
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Adaptive impedance mismatch detector system
Assignee: Motorola Solutions Inc
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Filing: 1985-11-22
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Granted: 1987-03-03
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Expires: 2005-11-22
Abstract
Abstract An adaptive impedance mismatch detector system is provided for determining whether or not a particular load impedance is matched or mismatched to the characteristic impedance of a transmission line. The detector system is capable of determining if a particular load impedance has a value outside of an impedance threshold circle having a center at a location other than at the center of the Smith Chart. The system changes the radius and/or center of the threshold circle in response to changes in circuit operating conditions or parameters. This flexibility enables the detector to be more selective in determining improper load conditions.
Inventors
- 👤 Harvey N. Turner, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:03
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/56; H03F1/565; H03F2200/00; H03F2200/486; H03F2200/78
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
90 words
An impedance mismatch detector system for detecting an impedance mismatch between first and second impedance exhibiting circuits coupled thereto comprising: detector circuit means for determining if the impedance of said first impedance exhibiting circuit is within or without a selected Smith Chart threshold circle, said threshold circle having a center at a location on the Smith Chart other than at the origin thereof, radius control circuit means, coupled to said detector circuit means, for controlling the radius of said threshold circle in response to a change in a first parameter.
Claim 2
Dependent Claim
90 words
An impedance mismatch detector system for detecting an impedance mismatch between first and second impedance exhibiting circuits coupled thereto comprising: detector circuit means for determining if the impedance of said first impedance exhibiting circuit is within or without a selected Smith Chart threshold circle, said threshold circle having a center at a location on the Smith Chart other than at the origin thereof, radius control circuit means, coupled to said detector circuit means, for controlling the radius of said threshold circle in response to a change in a first parameter.
Claim 3
Dependent Claim
33 words
The mismatch detector system of claim 1 including center control circuit means for controlling the position of said threshold circle on the Smith Chart in response to a change in a second parameter.
Claim 4
Dependent Claim
22 words
The mismatch detector system of claim 1 wherein said first impedance exhibiting circuit is an amplifier having a drive signal supplied thereto.
Claim 5
Dependent Claim
37 words
The mismatch detector system of claim 3 including temperature sensing means, coupled to said amplifier and said radius control circuit means, for sensing the temperature of said amplifier, said first parameter being the temperature of said amplifier.
Claim 6
Dependent Claim
39 words
The mismatch detector system of claim 3 including frequency sensing means, coupled to said amplifier and said radius control circuit means, for sensing the operating frequency of said amplifier, said first parameter being the operating frequency of said amplifier.
Claim 7
Dependent Claim
56 words
The mismatch detector system of claim 3 including a voltage supply, coupled to said amplifier, for supplying voltage thereto, said system further including supply voltage sensing means, coupled to said voltage supply and said radius control circuit means, for sensing the supply voltage generated thereby, said first parameter being the supply voltage of said voltage supply.
Claim 8
Dependent Claim
40 words
The mismatch detector system of claim 3 including a drive voltage sensing means, coupled to said amplifier and said radius control circuit means, for sensing the drive voltage level, said first parameter being the voltage level of said drive voltage.
Claim 9
Dependent Claim
34 words
The mismatch detector system of claim 3 including control circuit means, coupled to said amplifier, for controlling an operating condition of said amplifier in response to the determination made by said detector circuit means.
Claim 10
Dependent Claim
19 words
The mismatch detector system of claim 8 wherein said operating condition is the drive voltage level of said amplifier.
Claim 11
Dependent Claim
35 words
The mismatch detector system of claim 8 including a voltage supply, coupled to said amplifier, for supplying voltage thereto, wherein said operating condition is the voltage level of the supply voltage supplied to said amplifier.
Claim 12
Dependent Claim
31 words
The mismatch detector system of claim 8 wherein said control means is a selectively actuable stabilization circuit coupled to said amplifier, wherein said operating condition is the stability of said amplifier.
Claim 13
Dependent Claim
97 words
An impedance mismatch detector system for detecting an impedance mismatch between first and second impedance exhibiting circuits coupled thereto comprising: detector circuit means for determining if the impedance of said first impedance exhibiting circuit is within or without a selected Smith Chart threshold circle, said threshold circle having a center at a location on the Smith Chart other than at the origin thereof, center control circuit means, coupled to said detector circuit means, for controlling the position of the center of said threshold circle on the Smith Chart in response to a change in a first parameter.
Claim 14
Dependent Claim
97 words
An impedance mismatch detector system for detecting an impedance mismatch between first and second impedance exhibiting circuits coupled thereto comprising: detector circuit means for determining if the impedance of said first impedance exhibiting circuit is within or without a selected Smith Chart threshold circle, said threshold circle having a center at a location on the Smith Chart other than at the origin thereof, center control circuit means, coupled to said detector circuit means, for controlling the position of the center of said threshold circle on the Smith Chart in response to a change in a first parameter.
Claim 15
Dependent Claim
29 words
The mismatch detector system of claim 12 including radius control circuit means for controlling the radius of said threshold circle in response to a change in a second parameter.
Claim 16
Dependent Claim
22 words
The mismatch detector system of claim 12 wherein said first impedance exhibiting circuit is an amplifier having a drive signal supplied thereto.
Claim 17
Dependent Claim
37 words
The mismatch detector system of claim 14 including temperature sensing means, coupled to said amplifier and said center control circuit means, for sensing the temperature of said amplifier, said first parameter being the temperature of said amplifier.
Claim 18
Dependent Claim
39 words
The mismatch detector system of claim 14 including frequency sensing means, coupled to said amplifier and said center control circuit means, for sensing the operating frequency of said amplifier, said first parameter being the operating frequency of said amplifier.
Claim 19
Dependent Claim
56 words
The mismatch detector system of claim 14 including a voltage supply, coupled to said amplifier, for supplying voltage thereto, said system further including supply voltage sensing means, coupled to said voltage supply and said center control circuit means, for sensing the supply voltage generated thereby, said first parameter being the supply voltage of said voltage supply.
Claim 20
Dependent Claim
40 words
The mismatch detector system of claim 14 including a drive voltage sensing means, coupled to said amplifier and said center control circuit means, for sensing the drive voltage level, said first parameter being the voltage level of said drive voltage.
Claim 21
Dependent Claim
34 words
The mismatch detector system of claim 14 including control circuit means, coupled to said amplifier, for controlling an operating condition of said amplifier in response to the determination made by said first circuit means.
Claim 22
Dependent Claim
19 words
The mismatch detector system of claim 19 wherein said operating condition is the drive voltage level of said amplifier.
Claim 23
Dependent Claim
35 words
The mismatch detector system of claim 19 including a voltage supply, coupled to said amplifier, for supplying voltage thereto, wherein said operating condition is the voltage level of the supply voltage supplied to said amplifier.
Claim 24
Dependent Claim
31 words
The mismatch detector system of claim 19 wherein said control means is a selectively actuable stabilization circuit coupled to said amplifier, wherein said operating condition is the stability of said amplifier.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |