US4729088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated high frequency power supply
Assignee: Advance Transformer Co
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Filing: 1987-05-11
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Granted: 1988-03-01
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Expires: 2007-05-11
Abstract
Abstract A power supplier for providing a regulated high-frequency AC output with a bucking and boosting section and a push-pull output section in which a common switching element is used in both the bucking and boosting section and in the push-pull output section.
Inventors
- 👤 John M. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:05
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/5381
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A power supply including an inductance and a capacitance connected in series circuit to receive current from a source thereof; a junction in said series circuit between said inductance and said capacitance; first switch means which can be turned on to enable current to flow from said source through said inductance and capacitance; second switch means which can be turned on to provide for the flow of current from said source in a path in parallel with said capacitance; control means causing said first and second switch means to be on simultaneously for predetermined periods; a transformer primary with a first and second end and a center tap, said center tap being connected to said junction; third switching means connected to provide a path for current flow from said first end of said primary when turned on; said second switching means providing a path for current flow from said second end of said primary when turned on; and said control means turning said second and third switching means on alternately.
Claim 2
Dependent Claim
170 words
A power supply including an inductance and a capacitance connected in series circuit to receive current from a source thereof; a junction in said series circuit between said inductance and said capacitance; first switch means which can be turned on to enable current to flow from said source through said inductance and capacitance; second switch means which can be turned on to provide for the flow of current from said source in a path in parallel with said capacitance; control means causing said first and second switch means to be on simultaneously for predetermined periods; a transformer primary with a first and second end and a center tap, said center tap being connected to said junction; third switching means connected to provide a path for current flow from said first end of said primary when turned on; said second switching means providing a path for current flow from said second end of said primary when turned on; and said control means turning said second and third switching means on alternately.
Claim 3
Dependent Claim
79 words
A power supply as claimed in claim 1, wherein the inductance and capacitance each have first and second terminals and wherein a diode with a predetermined polarity is connected between the second terminal of the inductance and said junction point and the first terminal of said capacitance is connected to said junction point and wherein a second diode of the same predetermined polarity is connected between the second terminal of said capacitance and the first terminal of said inductance.
Claim 4
Dependent Claim
37 words
A power supply as claimed in claim 2, wherein a diode is connected in said path of current flow in parallel with said capacitance whereby current can flow in only one direction through said second switch means.
Claim 5
Dependent Claim
43 words
A power supply as claimed in claim 3, wherein a diode is connected in said path for current flow from said second end of said primary whereby current can flow in only one direction from said second end through said second switch means.
Claim 6
Dependent Claim
29 words
A power supply as in claim 4, wherein said control means turns said first and second switch means off simultaneously whereby said power supply operates in a bucking mode.
Claim 7
Dependent Claim
33 words
A power supply as in claim 4, wherein said control means leaves said first switch means on while turning off said second switch means whereby said power supply operates in a boosting mode.
Claim 8
Dependent Claim
35 words
A power supply as in claim 4, wherein said control means is connected to said junction and operates in response to voltage at said junction to control the duty cycle of said first switch means.
Claim 9
Dependent Claim
19 words
A power supply as in claim 7, wherein a choke is connected between said junction and said center tap.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |