US3860864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply circuits
Assignee: BAE Systems Electronics Ltd
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Filing: 1973-09-17
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Granted: 1975-01-14
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Expires: 1993-09-17
Abstract
Abstract A power supply circuit including a charge storage device, a pulse generating circuit which charges the device incrementally and a level detector circuit for preventing the further supply of charging pulses when the voltage across the device reaches a predetermined level. The charge storage device may be a capacitor or a pulse forming network.
Inventors
- 👤 Philip John Fitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:37
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/57; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/305; H02M3/315; H02M3/3155
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
A power supply circuit for feeding a steady d.c. voltage to a load, comprising charge storage means, pulse generator means for supplying charging current pulses to the charge storage means and level detector means operative to inhibit the further supply of charging pulses to the charge storage means when the stored charge attains a predetermined level; the pulse generator means comprising two sources of charging pulses; the charge storage means being a pulse forming network; and the level detector means including two circuits each sensitive to the stored charge attaining a respective predetermined level, one source of pulses acting in conjunction with one of the level detector circuits to effect coarse adjustment of the stored charge and the other source of pulses acting in conjunction with the second level detector circuit to effect fine adjustment.
Claim 2
Dependent Claim
135 words
A power supply circuit for feeding a steady d.c. voltage to a load, comprising charge storage means, pulse generator means for supplying charging current pulses to the charge storage means and level detector means operative to inhibit the further supply of charging pulses to the charge storage means when the stored charge attains a predetermined level; the pulse generator means comprising two sources of charging pulses; the charge storage means being a pulse forming network; and the level detector means including two circuits each sensitive to the stored charge attaining a respective predetermined level, one source of pulses acting in conjunction with one of the level detector circuits to effect coarse adjustment of the stored charge and the other source of pulses acting in conjunction with the second level detector circuit to effect fine adjustment.
Claim 3
Dependent Claim
18 words
A power supply circuit as claimed in claim 1 wherein the pulse generator means comprises a chopper circuit.
Claim 4
Dependent Claim
18 words
A power supply circuit as claimed in claim 1 wherein the pulse generator means comprises a series inverter.
Claim 5
Dependent Claim
40 words
A power supply circuit as claimed in claim 3 wherein the pulse generator means further includes a transformer for stepping up the magnitude of the output pulses of the series inverter and rectifier means for rectifying the stepped up pulses.
References Cited (Backward Citations)
US3221241A
Cited
US3551786A
Cited
US3541420A
Cited
US3541421A
Cited
US3518526A
Cited
US3621274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |