US3562556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-path frequency translation system
Assignee: International Standard Electric Corp
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Filing: 1966-12-09
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Granted: 1971-02-09
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Expires: 1986-12-09
Abstract
Abstract The invention provides a frequency translation system having Npaths which are identical and connected in parallel. Each of the paths includes at least one input modulator unit, a filter unit and at least one output modulator unit. The modulator units sample in turn a given input frequency spectrum for a set period of time determined by the number of paths N. The input and output modulator units are unbalanced. The output of each of the paths is connected to a summation unit to produce output frequency spectrums which are either an erect or inverted translation of the input frequency spectrum.
Inventors
- 👤 Donald Robert Barber
- 👤 Michael John Gingell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
H; H03; H03H; H03H19/00; H03H19/002; H04; H04J; H04J1/00; H04J1/02; H04J1/04; H03B; H03B21/00; H03B27/00; H03C; H03C1/00; H03C1/52; H03C1/60; H03D; H03D7/00; H03D7/16; H03D7/161; H03D7/163
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
114 words
A frequency translation system having N-paths which are identical and connected in parallel, each of said paths comprising at least one input modulator unit coupled to an input, said input modulator units including input transistor networks, a filter unit and at least one output modulator unit coupled to an output, said modulators sampling in turn a given input frequency spectrum for a period of time determined by N, said input and output modulator units being unbalanced to provide single sideband generation of signals, the outputs of each of said paths being connected to a summation unit the output frequency spectrum of which are either an erect or inverted translation of said input frequency spectrum.
Claim 2
Dependent Claim
114 words
A frequency translation system having N-paths which are identical and connected in parallel, each of said paths comprising at least one input modulator unit coupled to an input, said input modulator units including input transistor networks, a filter unit and at least one output modulator unit coupled to an output, said modulators sampling in turn a given input frequency spectrum for a period of time determined by N, said input and output modulator units being unbalanced to provide single sideband generation of signals, the outputs of each of said paths being connected to a summation unit the output frequency spectrum of which are either an erect or inverted translation of said input frequency spectrum.
Claim 3
Dependent Claim
34 words
A frequency translation system as claimed in claim 1 wherein said input frequency spectrum is band limited by providing a second filter unit which is interposed between said input and said input modulator units.
Claim 4
Dependent Claim
19 words
A frequency translation system as claimed in claim 1 wherein N is determined by said output frequency spectrum bandwidth.
Claim 5
Dependent Claim
34 words
A frequency translation system as claimed in claim 2 wherein said output frequency spectrum is band limited by providing a third filter unit which is interposed between said output and said output modulator units.
Claim 6
Dependent Claim
25 words
A frequency translation system as claimed in claim 4 wherein said filter units in each of said paths are provided by low pass filter units.
Claim 7
Dependent Claim
63 words
A frequency translation system as claimed in claim 5 wherein said low pass filter units each comprise a first capacitance connected in parallel with an inductance between the input and output terminals of said low pass filter unit, a second capacitance connected between said filter input terminal and earth potential, and a third capacitance connected between said filter output terminal and earth potential.
Claim 8
Dependent Claim
24 words
A frequency translation system as claimed in claim 1 wherein said output modulator unit is provided by an N-pole, N-way rotary output sampling switch.
Claim 9
Dependent Claim
61 words
A frequency translation system as claimed in claim 1 wherein each of said input transistor networks comprises a transistor having its emitter connected to earth potential, its base connected to a negative supply line via a first resistance and to a source of modulating signal via a second resistance, and its collector connected to the filter unit via a third resistance.
Claim 10
Dependent Claim
25 words
A frequency translation system as claimed in claim 1 wherein said output modulator units in each of said paths are provided by output transistor networks.
Claim 11
Dependent Claim
60 words
A frequency translation system as claimed in claim 9 wherein each of said output transistor networks comprises a transistor having its emitter connected to earth potential, its base connected to said negative supply line via a fifth resistance and to a source of modulating signal via a sixth resistance, and its collector connected to an output via a seventh resistance.
Claim 12
Dependent Claim
33 words
A frequency translation system as claimed in claim 10 wherein said summation unit includes a resistance in each of said paths which is connected to the output of the respective output transistor network.
Claim 13
Dependent Claim
120 words
A frequency translation system having N-paths which are identical and connected in parallel, each of said paths comprising at least one input modulator unit coupled to an input, each said input modulator unit including an N-Pole and N-way rotary output sampling switch, a filter unit and at least one output modulator unit coupled to an output, said modulators sampling in turn a given input frequency spectrum for a period of time determined by N, said input and Output modulator units being unbalanced to provide single sideband generation of signals, the outputs of each of said paths being connected to a summation unit the output frequency spectrum of which are either an erect or inverted translation of said input frequency spectrum.
Claim 14
Dependent Claim
120 words
A frequency translation system having N-paths which are identical and connected in parallel, each of said paths comprising at least one input modulator unit coupled to an input, each said input modulator unit including an N-Pole and N-way rotary output sampling switch, a filter unit and at least one output modulator unit coupled to an output, said modulators sampling in turn a given input frequency spectrum for a period of time determined by N, said input and Output modulator units being unbalanced to provide single sideband generation of signals, the outputs of each of said paths being connected to a summation unit the output frequency spectrum of which are either an erect or inverted translation of said input frequency spectrum.
Claim 15
Dependent Claim
44 words
A frequency translation system as claimed in claim 12 wherein an erect translation of said input frequency spectrum is provided at the output of said frequency translation system when said N-pole, N-way rotary input and output sampling switches are rotated in the same direction.
Claim 16
Dependent Claim
44 words
A frequency translation system as claimed in claim 12 wherein an inverted translation of said input frequency spectrum is provided at the output of said frequency translation system when said N-pole, N-way rotary input and output sampling switches are rotated in the opposite direction.
Claim 17
Dependent Claim
55 words
A frequency translation system as claimed in claim 12 wherein said input modulator units are duplicated and provided by two N-pole, N-way rotary input sampling switching, said N-pole, N-way rotary input sampling switches being rotated in opposite directions to provide output frequency spectrums which are an erect and inverted translation of said input frequency spectrum.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |