US4704543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse generator
Assignee: BAE Systems Electronics Ltd
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Filing: 1985-08-30
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Granted: 1987-11-03
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Expires: 2005-08-30
Abstract
Abstract A plurality of solid state switching devices, connected in parallel, are switched simultaneously to discharge a capacitor through the primary of a step-up transformer whose secondary is connected to the output type of a radar transmitter.
Inventors
- 👤 Antony T. Barker
- 👤 Simon C. Giles
- 👤 Robert Richardon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:23
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/57; G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/282; H03K17/00; H03K17/08; H03K17/081; H03K17/0814; H03K17/08142; H03K17/08146; H03K17/12; H03K17/122
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A modulator for a radar transmitter comprising a voltage step-up transformer having a number of primary windings and an equal number of solid state switching devices each arranged to switch simultaneous pulses of current to an associated primary to produce an additive effect resulting in a single high voltage pulse at a output of a secondary of the transformer, the secondary being connected to the output tube of the transmitter.
Claim 2
Dependent Claim
70 words
A modulator for a radar transmitter comprising a voltage step-up transformer having a number of primary windings and an equal number of solid state switching devices each arranged to switch simultaneous pulses of current to an associated primary to produce an additive effect resulting in a single high voltage pulse at a output of a secondary of the transformer, the secondary being connected to the output tube of the transmitter.
Claim 3
Dependent Claim
40 words
A pulse generator according to claim 1 in which a control electrode of the switching devices is connected to a voltage limiting device which prevents its voltage exceeding a critical value in the event of arcing in the output tube.
Claim 4
Dependent Claim
16 words
A pulse generator according to claim 1 in which the switching devices are field effect transistors.
References Cited (Backward Citations)
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US4050004A
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US3878449A
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US3980895A
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US4079265A
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GB2090492A
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US4442362A
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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) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |