US3881145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse generating device for radar transmitting system
Assignee: KIYOTAKA FURANO
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Filing: 1974-04-15
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Granted: 1975-04-29
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Expires: 1994-04-15
Abstract
Abstract In a radar transmitting system including a charge and discharge circuit and a pulse generating circuit which is initiated by discharging of the charge and discharging circuit, a semiconductor switching device such as, for example, a thyristor is employed to discharge the charge and discharge circuit. An inductive element is provided between the charge and discharge circuit and the semiconductor switching device so that the discharging of the charge and discharge circuit may be delayed until the semiconductor switching device is turned on completely.
Inventors
- 👤 Hidetoshi Tanigaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:06
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/57; G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A pulse generating device for a radar transmitting system comprising: a charge and discharge circuit including at least a capacitor, a pulse generating circuit which is initiated by discharging of said charge and discharge circuit so as to generate microwave pulses, a semiconductor switching device which may become conducting after the charge and discharge circuit is charged so as to permit the charge and discharge circuit to discharge, an inductance connected between said charge and discharge circuit and said semiconductor switching device to delay the discharge current from the charge and discharge circuit, and a capacitor connected in parallel to the semiconductor switching device, and which is charged by a portion of the charging current for the charge and discharge circuit and is discharged when the semiconductor switching device is turned on.
Claim 2
Dependent Claim
132 words
A pulse generating device for a radar transmitting system comprising: a charge and discharge circuit including at least a capacitor, a pulse generating circuit which is initiated by discharging of said charge and discharge circuit so as to generate microwave pulses, a semiconductor switching device which may become conducting after the charge and discharge circuit is charged so as to permit the charge and discharge circuit to discharge, an inductance connected between said charge and discharge circuit and said semiconductor switching device to delay the discharge current from the charge and discharge circuit, and a capacitor connected in parallel to the semiconductor switching device, and which is charged by a portion of the charging current for the charge and discharge circuit and is discharged when the semiconductor switching device is turned on.
References Cited (Backward Citations)
US3259829A
Cited
US3389322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |