US4399376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency switching circuit
Assignee: Toshiba Corp
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Filing: 1982-02-16
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Granted: 1983-08-16
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Expires: 2002-02-16
Abstract
Abstract A switching element, a transformer having a primary winding connected through said switching element to a DC power supply and a resonance capacitor connected in parallel with the primary winding of said transformer constitute a single-ended switching circuit. A magnetic amplifier is connected between the secondary side circuit of the transformer of the single-ended switching circuit and a rectifying/smoothing circuit, thus forming a high frequency switching circuit.
Inventors
- 👤 Toshihiro Onodera
- 👤 Koichiro Inomata
- 👤 Michio Hasegawa
- 👤 Yoshio Takamura
- 👤 Seiji Kajiwara
- 👤 Shoichi Higo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:51
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33538
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A high frequency switching circuit comprising: a single-ended switching circuit including a transformer having a primary winding and a secondary side circuit, a switching element circuit connected between the primary winding of said transformer and a DC power supply and a resonance capacitor connected in parallel with said primary winding; a rectifying/smoothing circuit including a filtering capacitor connected in parallel with a rectifying element and a load; and a magnetic amplifier connected between said secondary side circuit of said transformer and said rectifying/smoothing circuit.
Claim 2
Dependent Claim
84 words
A high frequency switching circuit comprising: a single-ended switching circuit including a transformer having a primary winding and a secondary side circuit, a switching element circuit connected between the primary winding of said transformer and a DC power supply and a resonance capacitor connected in parallel with said primary winding; a rectifying/smoothing circuit including a filtering capacitor connected in parallel with a rectifying element and a load; and a magnetic amplifier connected between said secondary side circuit of said transformer and said rectifying/smoothing circuit.
Claim 3
Dependent Claim
65 words
The high frequency switching circuit according to claim 1, wherein said magnetic amplifier is constituted by a saturable reactor connected between an output terminal of the secondary side circuit of the transformer and said rectifying element, and reflux means connected in parallel with said rectifying/smoothing circuit for passing current stored in said saturable reactor and forming a closed circuit in co-operation with said rectifying/smoothing circuit.
Claim 4
Dependent Claim
26 words
The high frequency switching circuit according to claim 2, wherein said reflux means includes a diode and a variable resistor connected in series with said diode.
Claim 5
Dependent Claim
52 words
The high frequency switching circuit according to claim 1, 2 or 3, wherein said magnetic amplifier includes a saturable reactor constructed with a magnetic material providing a hysteresis rectangular ratio of 80% or above and a coercive force of 0.6 oersteds or below at an operating frequency of 20 kHz or above.
Claim 6
Dependent Claim
56 words
The high frequency switching circuit according to claim 1, 2 or 3, wherein said switching element circuit includes a switching element connected between said power supply and the primary winding of said transformer and on-off controlled with a paredetermined period and also with a predetermined conducting period and a damper diode connected across said switching element.
References Cited (Backward Citations)
US2787755A
Cited
US3612895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |