US3913037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broad band balanced modulator
Assignee: Furukawa Electric Co Ltd
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Filing: 1973-12-17
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Granted: 1975-10-14
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Expires: 1993-12-17
Abstract
Abstract A broad band balanced modulator with a signal input side and a signal output side comprising first transformer means on the signal input side including an unbalanced-to-balanced transformer, second transformer means on the signal output side including a balanced-to-balanced transformer having a balanced coil with a center tap, rectifier means for connecting the output of said first transformer means to the input of said second transformer means, a local oscillator connected between ground and said center tap, and the size of the unbalanced-to-balanced transformer of signal input side being larger than that of said second transformer means.
Inventors
- 👤 Yusaku Himono
- 👤 Yuzo Kashiwayanagi
- 👤 Mikio Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:45
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/56; H03C1/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A broad band balanced modulator with a signal input side and a signal output side comprising: a. first transformer means on the signal input side including a first toroidal line transformer of 1:1 turn ratio of primary and secondary windings and an unbalanced-to-balanced transformer; b. second toroidal transformer means on the signal output side including a balanced-to-unbalanced transformer with a tap including a second line transformer of 1:1 turn ratio of primary and secondary windings; c. rectifier means connecting the output of said first transformer means to the input of said second transformer means; d. a local oscillator connected between ground and said tap; and, e. the toroidal size of said first transformer means being larger than that of said second transformer means.
Claim 2
Dependent Claim
123 words
A broad band balanced modulator with a signal input side and a signal output side comprising: a. first transformer means on the signal input side including a first toroidal line transformer of 1:1 turn ratio of primary and secondary windings and an unbalanced-to-balanced transformer; b. second toroidal transformer means on the signal output side including a balanced-to-unbalanced transformer with a tap including a second line transformer of 1:1 turn ratio of primary and secondary windings; c. rectifier means connecting the output of said first transformer means to the input of said second transformer means; d. a local oscillator connected between ground and said tap; and, e. the toroidal size of said first transformer means being larger than that of said second transformer means.
Claim 3
Dependent Claim
44 words
A broad band balanced modulator as set forth in claim 1 wherein the unbalanced-to-balanced and balanced-to-unbalanced transformers of signal input and output sides are the same size, and the size of said first line transformer is larger than that of said second line transformer.
Claim 4
Dependent Claim
40 words
A broad band balanced modulator as set forth in claim 1, wherein the first and second line transformers are the same, and the size of said unbalanced-to-balanced transformer of signal input side is larger than that of the balanced-to-unbalanced transformer.
Claim 5
Dependent Claim
23 words
A broad band balanced modulator as set forth in claim 1, further including a capacitor connected to the ground and to said tap.
Claim 6
Dependent Claim
49 words
A broad band balanced modulator as set forth in in claim 1, further including a metal shield plate and a hermetic terminal having capacitance with respect to the ground of small capacity mounted in said metal shield plate to introduce the output of said local oscillator to said tap.
References Cited (Backward Citations)
US2804596A
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US3184690A
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US3327220A
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US3328694A
Cited
US3461320A
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US3492603A
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |