US4965534A
Expired / Lapsed
US
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Channel frequency generator for use with a multi-frequency output generator
Assignee: Cisco Technology Inc
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Filing: 1989-05-19
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Granted: 1990-10-23
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Expires: 2009-05-19
Abstract
Abstract An apparatus and method is disclosed which phase locks a frequency-agile modulated output signal to any selected channel of a comb generated output. The phase error of an input signal is tracked, the input signal is modulated up to a carrier output frequency, and the modulated output frequency is locked to the comb generator output by subtracting the input signal and negating the phase error.
Inventors
- 👤 Larry S. McKinney
- 👤 Rezin E. Pidgeon, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:28
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/16; H03D7/161; H03D7/163; H04; H04N; H04N7/00; H04N7/10
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
61 words
A channel frequency generator for use in an incrementally related coherent signal generator, said channel frequency generator comprising: means for deriving a first and second frequency from selected outputs of said incrementally related coherent signal generator; and modulating means for modulating an input signal having a predetermined frequency to a frequency coherent selected channel frequency utilizing the first and second frequencies.
Claim 2
Dependent Claim
61 words
A channel frequency generator for use in an incrementally related coherent signal generator, said channel frequency generator comprising: means for deriving a first and second frequency from selected outputs of said incrementally related coherent signal generator; and modulating means for modulating an input signal having a predetermined frequency to a frequency coherent selected channel frequency utilizing the first and second frequencies.
Claim 3
Dependent Claim
19 words
The channel frequency generator according to claim 1 wherein the incrementally related coherent signal generator comprises a comb generator.
Claim 4
Dependent Claim
19 words
The channel frequency generator according to claim 2 wherein said comb generator comprises an incrementally related coherent comb generator.
Claim 5
Dependent Claim
24 words
The channel frequency generator according to claim 3 wherein the first frequency comprises a spacing frequency and the second frequency comprises a translation frequency.
Claim 6
Dependent Claim
21 words
The channel frequency generator according to claim 2 wherein the selected outputs comprise first and second, immediately adjacent, comb generator outputs.
Claim 7
Dependent Claim
21 words
The channel frequency generator according to claim 5 wherein the first comb generator output comprises the output providing the lowest frequency.
Claim 8
Dependent Claim
28 words
The channel frequency generator according to claim 2 wherein the first and second comb generator output frequencies are spaced apart by the amount of a predetermined spacing frequency.
Claim 9
Independent Claim
67 words
A method of generating a frequency coherent output signal for use with an incrementally related coherent signal generator, the method comprising the steps of: deriving a first frequency and a second frequency from at least one selected output of said incrementally related coherent signal generator; and modulating an input signal having a predetermined frequency to a frequency coherent selected channel frequency utilizing the first and second frequencies.
Claim 10
Independent Claim
67 words
A method of generating a frequency coherent output signal for use with an incrementally related coherent signal generator, the method comprising the steps of: deriving a first frequency and a second frequency from at least one selected output of said incrementally related coherent signal generator; and modulating an input signal having a predetermined frequency to a frequency coherent selected channel frequency utilizing the first and second frequencies.
Claim 11
Dependent Claim
17 words
The method according to claim 8 wherein the incrementally related coherent signal generator comprises a comb generator.
Claim 12
Dependent Claim
17 words
The method according to claim 9 wherein said comb generator comprises an incrementally related coherent comb generator.
Claim 13
Dependent Claim
22 words
The method according to claim 10 wherein the first frequency comprises a spacing frequency and the second frequency comprises a translation frequency.
Claim 14
Dependent Claim
19 words
The method according to claim 9 wherein the selected outputs comprises first and second, immediately adjacent, comb generator outputs.
Claim 15
Dependent Claim
19 words
The method according to claim 10 wherein the first comb generator output comprises the output providing the lowest frequency.
Claim 16
Dependent Claim
26 words
The method according to claim 10 wherein the first and second comb generator output frequencies are spaced apart by the amount of a predetermined spacing frequency.
Claim 17
Dependent Claim
23 words
The channel frequency generator according to claim 1 or 8 wherein said predetermined frequency input signal comprises a predetermined noncoherent frequency input signal.
Claim 18
Dependent Claim
61 words
A channel frequency generator for use in a multi-frequency output generator, said channel frequency generator comprising: means for deriving a spacing frequency and a translation frequency from selected outputs of said multi-frequency output generator; and modulating means for modulating an input signal having a predetermined frequency to a frequency coherent selected channel frequency utilizing the spacing frequency and the translation frequency.
Claim 19
Dependent Claim
61 words
A channel frequency generator for use in a multi-frequency output generator, said channel frequency generator comprising: means for deriving a spacing frequency and a translation frequency from selected outputs of said multi-frequency output generator; and modulating means for modulating an input signal having a predetermined frequency to a frequency coherent selected channel frequency utilizing the spacing frequency and the translation frequency.
Claim 20
Dependent Claim
17 words
The channel frequency generator according to claim 16 wherein said multi-frequency output generator comprises a comb generator.
Claim 21
Dependent Claim
19 words
The channel frequency generator according to claim 17 wherein said comb generator comprises an incrementally related coherent comb generator.
Claim 22
Dependent Claim
19 words
The channel frequency generator according to claim 17 wherein said comb generator comprises a harmonically related coherent comb generator.
Claim 23
Independent Claim
62 words
A method of generating a frequency coherent output signal for use with a multi-frequency output generator, the method comprising the steps of: deriving a spacing frequency and a translation frequency from selected outputs of said multi-frequency output generator; and modulating an input signal having a predetermined frequency to a frequency coherent selected channel frequency utilizing the spacing frequency and the translation frequency.
Claim 24
Independent Claim
62 words
A method of generating a frequency coherent output signal for use with a multi-frequency output generator, the method comprising the steps of: deriving a spacing frequency and a translation frequency from selected outputs of said multi-frequency output generator; and modulating an input signal having a predetermined frequency to a frequency coherent selected channel frequency utilizing the spacing frequency and the translation frequency.
Claim 25
Dependent Claim
15 words
The method according to claim 20 wherein the multi-frequency output generator comprises a comb generator.
Claim 26
Dependent Claim
17 words
The method according to claim 21 wherein said comb generator comprises an incrementally related coherent comb generator.
Claim 27
Dependent Claim
17 words
The method according to claim 21 wherein said comb generator comprises a harmonically related coherent comb generator.
References Cited (Backward Citations)
US4105949A
Cited
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