Patent US2423975A successfully refreshed from Google Patents.
US3662287A
Expired / Lapsed
US
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Voltage controlled oscillator multiplier
Assignee: United States Department of the Navy
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Filing: 1971-02-24
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Granted: 1972-05-09
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Expires: 1991-02-24
Abstract
Abstract A voltage controlled oscillator and varactor multiplier circuit having a varactor network coupling the output of an oscillator through a band pass filter to an output in which a single varactor produces frequencies tuned by varying the bias thereon and produces frequency multiplication.
Inventors
- 👤 Harry F Egbert
- 👤 James R Falls Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:08
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/05
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A voltage controlled oscillator-multiplier comprising: an oscillator circuit for generating a fundamental frequency of oscillations; a band pass filter for passing a desired frequency band; a tuning varactor diode circuit coupled across the output of said oscillator and coupled to the input of said band pass filter to multiply the frequency generated by said oscillator and to pass the desired frequency; and an adjustable direct current biasing voltage source coupled across said varactor diode for adjustably controlling the said fundamental frequency by varying the capacitive reactance thereof which diode at the same time produces frequency multiplication.
Claim 2
Dependent Claim
96 words
A voltage controlled oscillator-multiplier comprising: an oscillator circuit for generating a fundamental frequency of oscillations; a band pass filter for passing a desired frequency band; a tuning varactor diode circuit coupled across the output of said oscillator and coupled to the input of said band pass filter to multiply the frequency generated by said oscillator and to pass the desired frequency; and an adjustable direct current biasing voltage source coupled across said varactor diode for adjustably controlling the said fundamental frequency by varying the capacitive reactance thereof which diode at the same time produces frequency multiplication.
Claim 3
Dependent Claim
55 words
A voltage controlled oscillator-multiplier as set forth in claim 1 wherein said tuning varactor diode circuit includes a capacitor in series with said varactor with the anode of said varactor coupled to the output of said oscillator and said capacitor coupled to a fixed potential in common with said oscillator and said band pass filter.
Claim 4
Dependent Claim
33 words
A voltage controlled oscillator-multiplier as set forth in claim 2 wherein said adjustable direct current biasing voltage source is a variable voltage applied through an inductance to the cathode of said varactor diode.
Claim 5
Dependent Claim
36 words
A voltage controlled oscillator-multiplier as set forth in claim 3 wherein said tuning varactor diode circuit includes at least one idler to raise the gain in multiplication and to reduce the noise of said desired frequency.
References Cited (Backward Citations)
US3397369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |