US3699356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant sweep generator
Assignee: Raytheon Co
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Filing: 1971-08-04
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Granted: 1972-10-17
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Expires: 1991-08-04
Abstract
Abstract A resonant sweep generator comprising a diode for coupling a voltage source to a reactance load during a first interval of each operating cycle; a transistor for coupling the voltage source to the load during a second interval of each operating cycle; a compensation bias arrangement which provides improved sweep linearity by forward biasing the diode so as to cause the voltage levels applied to the load during the first and second intervals to be substantially equal; and a drive circuit which allows increased efficiency and speed of operation by controlling the transistor so that it does not saturate.
Inventors
- 👤 Ted W Berwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:43
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/62; H03K4/64; H03K4/90
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
95 words
In a resonant sweep generator for applying current sweeps to a reactance load during each of a plurality of operating cycles, comprising: a voltage source; a first diode for coupling said voltage source to said load during one interval of each operating cycle; and a first transistor for coupling said voltage source to said load during another interval of each operating cycle; wherein the improvement comprises compensation bias means for biasing said first diode to cause the voltage levels applied to said load during both said intervals of each operating cycle to be substantially equal.
Claim 2
Dependent Claim
95 words
In a resonant sweep generator for applying current sweeps to a reactance load during each of a plurality of operating cycles, comprising: a voltage source; a first diode for coupling said voltage source to said load during one interval of each operating cycle; and a first transistor for coupling said voltage source to said load during another interval of each operating cycle; wherein the improvement comprises compensation bias means for biasing said first diode to cause the voltage levels applied to said load during both said intervals of each operating cycle to be substantially equal.
Claim 3
Dependent Claim
38 words
The combination of claim 1 wherein said compensation bias means includes a capacitor coupled to said first diode for forward biasing said first diode, and meaNs for charging said capacitor to a preselected potential during each operating cycle.
Claim 4
Dependent Claim
34 words
The combination of claim 2 wherein said charging means includes a transformer having a primary winding coupled in parallel with said load and a secondary winding coupled between said voltage source and said capacitor.
Claim 5
Dependent Claim
40 words
The combination of claim 3 wherein said secondary winding is coupled to said capacitor through a second diode, with said second diode being poled to charge said capacitor so that said capacitor applies forward bias current to said first diode.
Claim 6
Dependent Claim
20 words
The combination of claim 4 further comprising a resistor coupled in series with said secondary winding and said second diode.
Claim 7
Dependent Claim
92 words
The combination of claim 1 wherein said compensation bias means includes a transformer having a primary winding coupled in parallel with said load, and a secondary winding; a capacitor coupled to said first diode; and a second diode; said secondary winding and said second diode being series coupled between said voltage source and said capacitor such that said capacitor is charged to a level sufficient to forward bias said first diode to cause the voltage applied across said load to be substantially the same during both said intervals of each operating cycle.
Claim 8
Dependent Claim
45 words
The combination of claim 1 further comprising drive means for biasing said first transistor into conduction at less than its saturation level during said another interval of each operating cycle, and for driving said first transistor out of conduction during the remaining intervals of operation.
Claim 9
Dependent Claim
100 words
The combination of claim 7 wherein said first transistor has its collector-emitter current path coupled between said voltage source and said load; and said drive means includes an input terminal adapted for receiving gating signals; a second transistor having a base coupled to said input terminal, a collector coupled to the collector of said first transistor, and an emitter coupled to the base of said first transistor; and a third transistor having a base coupled to said input terminal, a collector coupled to the emitter of said first transistor, and an emitter coupled to the base of said first transistor.
Claim 10
Dependent Claim
122 words
The combination of claim 7 wherein said first transistor has its collector-emitter current path coupled between said voltage source and said load; and said drive means includes an input terminal adapted for receiving gating signals; and second diode; a second transistor having a base coupled through said second diode to said input terminal, a collector coupled to said compensation bias means, and an emitter coupled to the base of said first transistor; a third transistor having a base coupled to said input terminal, a collector coupled to the emitter of said first transistor, and an emitter coupled to the base of said first transistor; and further comprising a third diode coupled between said input terminal and the collector of said first transistor.
Claim 11
Dependent Claim
20 words
The combination of claim 9 further comprising a fourth diode coupled between the bases of said second and third transistors.
Claim 12
Dependent Claim
28 words
The combination of claim 7 wherein said compensation bias means includes a capacitor coupled to said first diode, and means for charging said capacitor to a preselected potential.
Claim 13
Dependent Claim
35 words
The combination of claim 11 wherein said charging means includes a transformer having a primary winding effectively coupled in parallel with said load and a secondary winding coupled between said voltage source and said capacitor.
Claim 14
Dependent Claim
47 words
The combination of claim 12 wherein said charging means includes a fifth diode; said secondary winding is coupled to said capacitor through said fifth diode; and said fifth diode is poled to charge said capacitor so that said capacitor applies forward bias current through said first diode.
Claim 15
Dependent Claim
46 words
The combination of claim 3 wherein said load includes an inductor coupled in parallel with a capacitance element, and further comprising means for applying direct current to said load such that the applied direct currenT flows through said inductor and said primary winding of said 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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |