Patent US6101102A successfully refreshed from Google Patents.
US6101102A
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US
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Fixed frequency regulation circuit employing a voltage variable dielectric capacitor
Assignee: Raytheon Co
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Filing: 1999-04-28
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Granted: 2000-08-08
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Expires: 2019-04-28
Abstract
Abstract Frequency regulating apparatus comprising a high power, voltage variable dielectric varactor or capacitor (or ferroelectric voltage variable dielectric capacitor) for use as a control element in the regulation circuit that actively tunes a resonant network to modulate power delivered to a load. The voltage variable dielectric capacitor comprises a substrate having a bottom electrode 33 formed thereon. A dielectric material is disposed on the substrate is a crystallized ceramic material that preferably comprises a barium, strontium, and titanium mixture. A top electrode is disposed on top of the crystallized ceramic material. Methods of fabricating the voltage variable dielectric varactor (capacitor) are also disclosed.
Inventors
- 👤 Michael Brand
- 👤 Thomas Kirk Dougherty
- 👤 John J. Drab
- 👤 Brian M. Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:34
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/12; H10; H10D; H10D84/00; H10D84/201; H10D84/204; H10D84/212; H10D84/215
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A fixed frequency resonant converter comprising: a resonant inverter that outputs an unregulated source voltage; an impedance matching and isolation network coupled to the inverter that comprises a voltage variable dielectric varactor that converts the unregulated source voltage into a sinusoidal power waveform; a rectifier/filter coupled to the impedance matching and isolation network; an error amplifier for sensing the output of the converter and comparing the sensed output with a reference voltage to generate an error signal; a driver coupled to the error amplifier and the voltage variable dielectric varactor for generating a variable bias to control the varactor in response to the error signal.
Claim 2
Dependent Claim
105 words
A fixed frequency resonant converter comprising: a resonant inverter that outputs an unregulated source voltage; an impedance matching and isolation network coupled to the inverter that comprises a voltage variable dielectric varactor that converts the unregulated source voltage into a sinusoidal power waveform; a rectifier/filter coupled to the impedance matching and isolation network; an error amplifier for sensing the output of the converter and comparing the sensed output with a reference voltage to generate an error signal; a driver coupled to the error amplifier and the voltage variable dielectric varactor for generating a variable bias to control the varactor in response to the error signal.
Claim 3
Dependent Claim
18 words
The converter recited in claim 1 wherein the voltage variable dielectric varactor is connected in a series-shunt configuration.
Claim 4
Dependent Claim
18 words
The converter recited in claim 1 wherein the voltage variable dielectric varactor is connected in a series-parallel configuration.
Claim 5
Dependent Claim
18 words
The converter recited in claim 1 wherein the voltage variable dielectric varactor is connected in a parallel configuration.
Claim 6
Dependent Claim
70 words
The converter recited in claim 1 wherein the voltage variable dielectric varactor comprises: a substrate; a bottom electrode disposed on a surface of the substrate; a dielectric material disposed on an exposed surface of the bottom electrode; and a top electrode disposed on an exposed surface of the crystallized ceramic material; and wherein the bottom electrode and top electrode sandwich the dielectric material to form a voltage variable dielectric capacitor.
Claim 7
Dependent Claim
15 words
The converter recited in claim 5 wherein the dielectric material comprises a crystallized ceramic material.
Claim 8
Dependent Claim
17 words
The converter recited in claim 5 wherein the dielectric material comprises a barium strontium titanate thin film.
Claim 9
Dependent Claim
23 words
The converter recited in claim 6 wherein the crystallized ceramic material comprises a mixture of decomposed barium, strontium, and titanium metal organic salts.
Claim 10
Dependent Claim
21 words
The converter recited in claim 5 wherein the bottom electrode comprises a tantalum adhesion layer having a platinum layer disposed thereon.
Claim 11
Dependent Claim
12 words
The converter recited in claim 5 wherein the top electrode comprises platinum.
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) | 2003-08-08 | 2004-02-07 | 2004-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-08 | 2008-02-07 | 2008-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-08 | 2012-02-07 | 2012-08-08 | $7700.00 | Window Closed / Lapsed |