Patent US3796897A successfully refreshed from Google Patents.
US3796897A
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US
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High voltage generating apparatus utilizing piezoelectric transformers
Assignee: Denki Onkyo Co Ltd
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Filing: 1971-06-14
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Granted: 1974-03-12
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Expires: 1991-06-14
Abstract
Abstract In a high voltage generating apparatus comprising a combination of a piezoelectric transformer and a voltage multiplying rectifying circuit connected to the output electrode of the piezoelectric transformer there are provided a pair of independent voltage multiplying rectifying circuits for producing high DC voltages of the opposite polarities.
Inventors
- 👤 Y Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:33
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/40; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
High voltage generating apparatus comprising a piezoelectric transformer including driving electrodes formed on the driving region and a single AC output electrode formed on the output region of said piezoelectric transformer, a first voltage multiplying rectifying circuit for producing DC output voltage of one polarity relative to a reference potential, the input terminal of said first voltage multiplying rectifying circuit being directly connected to said single output electrode, a second voltage multiplying rectifying circuit for producing DC output voltage of the opposite polarity relative to said reference potential and a DC blocking capacitor connected between said single output electrode and the input terminal of said second voltage multiplying rectifying circuit, the voltage breakdown rating for said blocking capacitor being higher than said DC output voltage of either of said multiplying rectifying circuits.
Claim 2
Dependent Claim
132 words
High voltage generating apparatus comprising a piezoelectric transformer including driving electrodes formed on the driving region and a single AC output electrode formed on the output region of said piezoelectric transformer, a first voltage multiplying rectifying circuit for producing DC output voltage of one polarity relative to a reference potential, the input terminal of said first voltage multiplying rectifying circuit being directly connected to said single output electrode, a second voltage multiplying rectifying circuit for producing DC output voltage of the opposite polarity relative to said reference potential and a DC blocking capacitor connected between said single output electrode and the input terminal of said second voltage multiplying rectifying circuit, the voltage breakdown rating for said blocking capacitor being higher than said DC output voltage of either of said multiplying rectifying circuits.
Claim 3
Dependent Claim
20 words
The high voltage generating apparatus according to claim 1 wherein said voltage multiplying rectifying circuits are voltage doubling rectifying circuits.
Claim 4
Dependent Claim
20 words
The high voltage generating apparatus according to claim 1 wherein said voltage multiplying rectifying circuits are voltage quadrupling rectifying circuits.
Claim 5
Dependent Claim
34 words
The high voltage generating apparatus according to claim 1 wherein said DC blocking capacitor has an impedance that equalizes the output voltages of opposite polarities of said first and second voltage multiplying rectifying circuits.
Claim 6
Dependent Claim
29 words
The high voltage generating apparatus according to claim 4 wherein said DC blocking capacitor has an impedance less than about 10% of the output impedance of said piezoelectric transformer.
Claim 7
Dependent Claim
34 words
The high voltage generating apparatus according to claim 4 wherein said DC blocking capacitor has a capacitance of more than 100 pF where the output frequency of said piezoelectric transformer equals 40 to 60KHz.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |