US3737679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar modulator
Assignee: Boeing North American Inc
•
Filing: 1972-02-04
•
Granted: 1973-06-05
•
Expires: 1992-02-04
Abstract
Abstract In a silicon-controlled-rectifier type switched or triggered pulse modulator, means for effecting an energy level reduction for a given ''''current-time'''' product associated with soaking the silicon-controlled rectifier which switches the main pulseforming network. An auxiliary pulse-forming network is diodecoupled to an auxiliary charging choke and diode coupled to the input of a main delay reactor, the network response time being matched to the delay time of the delay reactor of the pulse modulator.
Inventors
- 👤 G Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:36
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/57
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
In a pulse modulator employing a silicon controlled rectifier type switch shunted across a triggered input to a delay reactor in series with a pulse forming network circuit, a charging transformer coupled to said input of said delay reactor, and having auxiliary charging choke means associated therewith, and an auxiliary pulse forming network input coupled to said auxiliary charging choke means and output coupled to the input of said delay reactor.
Claim 2
Dependent Claim
71 words
In a pulse modulator employing a silicon controlled rectifier type switch shunted across a triggered input to a delay reactor in series with a pulse forming network circuit, a charging transformer coupled to said input of said delay reactor, and having auxiliary charging choke means associated therewith, and an auxiliary pulse forming network input coupled to said auxiliary charging choke means and output coupled to the input of said delay reactor.
Claim 3
Dependent Claim
30 words
The device of claim 1 in which a load resistor is interposed in series circuit between an output terminal of said auxiliary pulse forming network and an output coupling thereof.
Claim 4
Dependent Claim
66 words
The device of claim 1 in which then is further provided three coupling diodes, a respective one of said coupling diodes being interposed in series circuit between said charging transformer and said input to said delay reactor, between said auxiliary charging choke means and an input of said auxiliary pulse forming network and between an output of said auxiliary pulse forming network and said delay reactor.
Claim 5
Dependent Claim
30 words
The device of claim 3 in which a load resistor is interposed in series circuit between an output terminal of said auxiliary pulse forming network and an associated coupling diode.
Claim 6
Dependent Claim
28 words
The device of claim 1 in which the peak response time of said auxiliary pulse forming network is substantially equal to the delay provided by said delay reactor.
Claim 7
Dependent Claim
75 words
In a pulse modulator employing a silicon controlled rectifier type switch means shunted across a triggered input to a delay reactor having an output winding and connected in series with a pulse forming network circuit, the combination comprising a charging choke diode-coupled to said delay reactor, and having auxiliary charging choke means associated therewith, and an auxiliary pulse forming network diode-input-coupled to said auxiliary charging choke means and diode output coupled to said delay reactor.
Claim 8
Dependent Claim
75 words
In a pulse modulator employing a silicon controlled rectifier type switch means shunted across a triggered input to a delay reactor having an output winding and connected in series with a pulse forming network circuit, the combination comprising a charging choke diode-coupled to said delay reactor, and having auxiliary charging choke means associated therewith, and an auxiliary pulse forming network diode-input-coupled to said auxiliary charging choke means and diode output coupled to said delay reactor.
Claim 9
Dependent Claim
14 words
The device of claim 6 in which said diode couplings are mutually commonly poled.
Claim 10
Dependent Claim
34 words
The device of claim 6 in which there is further provided a load resistor interposed in series circuit between an output terminal of said auxiliary pulse forming network and a diode output coupling thereof.
Claim 11
Dependent Claim
42 words
The device of claim 6 in which said delay reactor and said auxiliary pulse forming network are further arranged such that the delay provided by the delay reactor is substantially equal to the peak pulse time of the auxiliary pulse forming network.
Claim 12
Dependent Claim
41 words
The device of claim 6 in which there is Further provided a switching transformer interposed in circuit between said delay reactor and said first mentioned pulse forming network, and a capacitor in series with a primary winding of said switching transformer.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |