Patent US3660685A successfully refreshed from Google Patents.
US3660685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse generating transformer circuit
Assignee: Pioneer Magnetics Inc
•
Filing: 1971-02-25
•
Granted: 1972-05-02
•
Expires: 1991-02-25
Abstract
Abstract A pulse generating transformer circuit is provided for producing a series of uni-polar pulses of variable amplitude and duration, and in which the transformer is reset between successive pulses within a time independent of the product of the amplitude and duration of the individual pulses produced by the circuit. In this way, there is no limitation of the rapidity with which the successive pulses produced by the circuit may follow one another. The circuit of the invention achieves its desired purpose by connecting a winding of the transformer in parallel with a capacitor to form a resonant circuit which is effective for one half-cycle.
Inventors
- 👤 James K Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:30
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30; H03K5/00; H03K5/01; H03K5/04; H03K5/07
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
176 words
A pulse producing circuit including: a transformer having a primary winding and a secondary winding; a load circuit connected to said secondary winding; an input circuit connected to said primary winding and including a first switching transistor responsive to an input signal for cyclically connecting said primary winding across a unidirectional potential source for a predetermined time interval for each cycle as determined by said input signals, and including capacitor means and a second switching transistor for connecting said capacitor means into a resonant circuit relationship with said primary winding at the end of each of said predetermined intervals, so as to create an oscillation across said resonant circuit; each of said first and second transistors including base, emitter and collector electrodes; a damping resistor connected between the collector electrode and base electrode of said second transistor; a diode connected across the emitter electrode and collector electrode of said second transistor; and said input circuit further including diode means connected across said capacitor means to limit said oscillation to one-half cycle and thereby reset said transformer.
Claim 2
Dependent Claim
176 words
A pulse producing circuit including: a transformer having a primary winding and a secondary winding; a load circuit connected to said secondary winding; an input circuit connected to said primary winding and including a first switching transistor responsive to an input signal for cyclically connecting said primary winding across a unidirectional potential source for a predetermined time interval for each cycle as determined by said input signals, and including capacitor means and a second switching transistor for connecting said capacitor means into a resonant circuit relationship with said primary winding at the end of each of said predetermined intervals, so as to create an oscillation across said resonant circuit; each of said first and second transistors including base, emitter and collector electrodes; a damping resistor connected between the collector electrode and base electrode of said second transistor; a diode connected across the emitter electrode and collector electrode of said second transistor; and said input circuit further including diode means connected across said capacitor means to limit said oscillation to one-half cycle and thereby reset said transformer.
Claim 3
Dependent Claim
66 words
The circuit defined in claim 1 in which the collector electrode of said second transistor is connected to one side of the primary winding of said transformer, and the emitter electrode of said second transistor is connected to a point of reference potential, and in which said capacitor means is connected to the other side of said primary winding and to said point of reference potential.
Claim 4
Dependent Claim
32 words
The circuit defined in claim 2 and which includes a resistor and diode means series connected with one another and connecting said capacitor means to one terminal of said unidirectional potential source.
Claim 5
Dependent Claim
65 words
The pulse producing circuit defined in claim 1 in which said output circuit includes a power transistor having a base connected to one side of said secondary winding, and having a collector and an emitter, and which includes diode means connecting said emitter to a tap on said secondary winding, the other side of said secondary winding being connected to a point of reference potential.
Claim 6
Dependent Claim
44 words
The circuit defined in claim 4 and which includes a load connected to the collector of said transistor and to the positive terminal of a second unidirectional potential source, the negative terminal of said second source being connected to said point of reference potential.
Claim 7
Dependent Claim
45 words
The circuit defined in claim 5 and in whicH the said load is connected between the said point of reference potential and the said secondary winding, and the collector of said power transistor is connected to the positive terminal of said second unidirectional potential source.
References Cited (Backward Citations)
US3291110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |