US4739283A
Expired / Lapsed
US
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Variable transient response control for linear integrated-circuit high-frequency amplifiers
Assignee: AMERICAN VIDEO GRAPHICS LP
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Filing: 1987-03-02
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Granted: 1988-04-19
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Expires: 2007-03-02
Abstract
Abstract A variable transient response control for linear integrated-circuit high-frequency amplifiers comprises a variable equivalent resistive damping network interposed in the signal transmission path, and an electronic control circuit therefor. The resistive network includes preferably Schottky diodes having low inductance and a determinable equivalent resistance in the forward conducting condition.
Inventors
- 👤 Arthur J. Metz
- 👤 James S. Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:12
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/02; H03G3/14; H03G3/18; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
102 words
A variable transient response control for a high-frequency signal transmission path, comprising: a first circuit node and a second circuit node located at predetermined points in said signal transmission path; a current generator connected to said second circuit node and providing thereto a predetermined current; a variable resistive network comprising a first unidirectional conducting device paralleled by a serial combination of a resistor and a second unidirectional conducting device interposed between said first and second circuit nodes; and control circuit means for controllably steering said predetermined current through said first and second unidirectional conducting devices thereby to vary the equivalent resistance thereof.
Claim 2
Dependent Claim
102 words
A variable transient response control for a high-frequency signal transmission path, comprising: a first circuit node and a second circuit node located at predetermined points in said signal transmission path; a current generator connected to said second circuit node and providing thereto a predetermined current; a variable resistive network comprising a first unidirectional conducting device paralleled by a serial combination of a resistor and a second unidirectional conducting device interposed between said first and second circuit nodes; and control circuit means for controllably steering said predetermined current through said first and second unidirectional conducting devices thereby to vary the equivalent resistance thereof.
Claim 3
Dependent Claim
17 words
A variable transient response control in accordance with claim 1 wherein said unidirectional conducting devices are diodes.
Claim 4
Dependent Claim
17 words
A variable transient response control in accordance with claim 2 wherein said diodes are Schottky barrier diodes.
Claim 5
Dependent Claim
103 words
A variable transient response control in accordance with claim 1 wherein said control circuit means comprises a first transistor having a collector connected to said first circuit node, a second transistor having a collector connected to the junction of said resistor and said second unidirectional conducting means, wherein emitters of said first and second transistors are coupled together to a current generator which generates a current at least as great as said predetermined current, and wherein a control voltage generator is coupled to a base of said first transistor and a reference voltage source is coupled to a base of said second transistor.
References Cited (Backward Citations)
JPS57147310A
Cited
JPS57203306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |