US5357222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage controlled component including a capacitive diode biased to operate in the linear region
Assignee: Nokia Oyj
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Filing: 1992-10-07
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Granted: 1994-10-18
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Expires: 2012-10-07
Abstract
Abstract The invention relates to a biased electronic circuit in which a voltage-controlled component has a characteristic with a non-linear portion and a substantially linear portion. The circuit is biased by a voltage being applied to one terminal of the component thereby shifting the operation of the component to the linear portion.
Inventors
- 👤 Seppo Hietala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:17
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/16; H03J3/18; H03J3/185
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
A voltage controlled oscillator (VCO) comprising: a voltage-controlled capacitance diode having first and second terminals and further exhibiting a capacitance voltage response characteristic which includes a linear portion and a nonlinear portion, said linear portion dependent upon an applied bias voltage; means for applying a bias voltage to said first terminal of said capacitance diode which causes said capacitance diode to operate in said linear portion; means for applying a control voltage to said second terminal of said capacitance diode, said control voltage being of opposite polarity to said bias voltage; and modulation means for applying a modulation voltage to said first terminal of said capacitance diode which causes substantially linear changes in said capacitance of said capacitance diode in accord with changes in said modulation voltage, whereby an output frequency of said VCO exhibits substantially linear frequency changes in accord with changes in said modulation voltage.
Claim 2
Dependent Claim
147 words
A voltage controlled oscillator (VCO) comprising: a voltage-controlled capacitance diode having first and second terminals and further exhibiting a capacitance voltage response characteristic which includes a linear portion and a nonlinear portion, said linear portion dependent upon an applied bias voltage; means for applying a bias voltage to said first terminal of said capacitance diode which causes said capacitance diode to operate in said linear portion; means for applying a control voltage to said second terminal of said capacitance diode, said control voltage being of opposite polarity to said bias voltage; and modulation means for applying a modulation voltage to said first terminal of said capacitance diode which causes substantially linear changes in said capacitance of said capacitance diode in accord with changes in said modulation voltage, whereby an output frequency of said VCO exhibits substantially linear frequency changes in accord with changes in said modulation voltage.
Claim 3
Dependent Claim
44 words
The VCO as recited in claim 1, wherein said first terminal is an anode of said capacitance diode and said second terminal is a cathode of said capacitance diode, said bias voltage exhibiting a negative polarity and said control voltage exhibiting a positive polarity.
Claim 4
Dependent Claim
31 words
The VCO as recited in claim 1 wherein said VCO is incorporated in a radiotelephone and said bias voltage is derived from a rectified, filtered, oscillation signal present in said radiotelephone.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |