Patent US3706928A successfully refreshed from Google Patents.
US3706928A
Expired / Lapsed
US
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Coherent frequency multiplier and encoder
Assignee: United States Department of the Navy
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Filing: 1964-11-12
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Granted: 1972-12-19
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Expires: 1984-11-12
Abstract
Abstract The present invention provides a signal generator capable of producing randomly selected coherent output frequencies. Specifically, the proposed generator comprises a first section which generates a carrier frequency, and a second section, containing a chain of frequency multipliers, which is capable of producing a plurality of coherent modulating frequencies. The carrier frequency is first selectively modulated with random ones of the plurality of modulating frequencies to produce high and low sideband and the high and low sidebands are then selectively connected to the output of the generator by a random code.
Inventors
- 👤 Emanuel A Beck
- 👤 Arthur J Bassnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:18
CPC Classifications
H; H03; H03B; H03B21/00; H03B21/01; H03B21/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
In a signal generator, generating means for providing signals of differing frequencies, a modulator, selecting means for randomly selecting one of the signals from said generating means and applying said selected signal to said modulator, means for applying a carrier wave to said modulator to provide a high sideband and a low sideband signal from said modulator, and switching means for randomly allowing either of said high sideband or said low sideband signal to pass therethrough.
Claim 2
Dependent Claim
76 words
In a signal generator, generating means for providing signals of differing frequencies, a modulator, selecting means for randomly selecting one of the signals from said generating means and applying said selected signal to said modulator, means for applying a carrier wave to said modulator to provide a high sideband and a low sideband signal from said modulator, and switching means for randomly allowing either of said high sideband or said low sideband signal to pass therethrough.
Claim 3
Dependent Claim
17 words
The signal generator of claim 1, in which the signals provided by said generating means are coherent.
Claim 4
Dependent Claim
23 words
The signal generator of claim 1, in which said selecting means is a matrix having output signals randomly applied to its output leads.
Claim 5
Dependent Claim
141 words
A signal generator comprising, a modulator for providing a signal having a high sideband and a low sideband output, a three port circulator having its first port connected to the output of said modulator, a first switch connected to the second port of said circulator, a high sideband filter connected to the third port of said circulator, a low sideband filter connected in series with said first switch, a second switch connected in series with said high sideband filter, a load connected to both said second switch and said low sideband filter, and means for randomly closing either of said switches, whereby the closing of said first switch causes the low sideband output of said modulator to appear across said load and the closing of said second switch causes the high sideband output of said modulator to appear across said load.
Claim 6
Dependent Claim
141 words
A signal generator comprising, a modulator for providing a signal having a high sideband and a low sideband output, a three port circulator having its first port connected to the output of said modulator, a first switch connected to the second port of said circulator, a high sideband filter connected to the third port of said circulator, a low sideband filter connected in series with said first switch, a second switch connected in series with said high sideband filter, a load connected to both said second switch and said low sideband filter, and means for randomly closing either of said switches, whereby the closing of said first switch causes the low sideband output of said modulator to appear across said load and the closing of said second switch causes the high sideband output of said modulator to appear across said load.
Claim 7
Dependent Claim
26 words
The signal generator of claim 4 in which the means for randomly closing said switches is a matrix for randomly providing output pulses to said switches.
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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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |