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US4853612A
Expired / Lapsed
US
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RF power control circuit
Assignee: NEC Corp
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Filing: 1988-11-23
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Granted: 1989-08-01
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Expires: 2008-11-23
Abstract
Abstract An RF power control circuit for dividing a DC voltage by a plurality of resistors, selecting one of the partial voltages, and using the selected voltage as a reference voltage, thereby obtaining a multilevel RF output, has first and second switching circuits, controlled by an identical selection signal, each for selecting one of the partial voltages obtained by the resistors and outputting the selected voltage, and a selecting circuit for selecting one of outputs from the first and second switching circuits in accordance with a control signal.
Inventors
- 👤 Shinichi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3005; H03G3/3026; H03G3/3036; H03G3/3042; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0225; H04W52/0229; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
An RF power control circuit for dividing a DC voltage by a plurality of resistors, selecting one of the partial voltages, and using the selected voltage as a reference voltage, thereby obtaining a multilevel RF output, comprising: first and second switching circuits, controlled by an identical selection signal, each for selecting one of the partial voltages obtained by said resistors and outputting the selected voltage; and selecting means for selecting one of outputs from said first and second switching circuits in accordance with a control signal.
Claim 2
Dependent Claim
86 words
An RF power control circuit for dividing a DC voltage by a plurality of resistors, selecting one of the partial voltages, and using the selected voltage as a reference voltage, thereby obtaining a multilevel RF output, comprising: first and second switching circuits, controlled by an identical selection signal, each for selecting one of the partial voltages obtained by said resistors and outputting the selected voltage; and selecting means for selecting one of outputs from said first and second switching circuits in accordance with a control signal.
Claim 3
Dependent Claim
32 words
A circuit according to claim 1, wherein said selecting means includes inhibiting means for inhibiting operation of said first or second switching circuit in accordance with logical value of the control signal.
Claim 4
Dependent Claim
37 words
A circuit according to claim 1, wherein said selecting means includes a third switching circuit for selecting one of the outputs from said first and second switching circuits in accordance with logical value of the control signal.
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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |