US4600982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low power consuming AC to DC converter
Assignee: Siemens Business Communication Systems Inc
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Filing: 1985-06-10
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Granted: 1986-07-15
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Expires: 2005-06-10
Abstract
Abstract A circuit for converting an AC potential to a regulated DC potential which circuit consumes a minimum of power and is relatively inexpensive to build is described. A capacitor is used to couple the AC potential to a rectifier. The duration of current flow through the capacitor is controlled to obtain the regulation. An on or off switching device is used such as an SCR, eliminating the current flow regulation devices often used in regulative power supplies. The invented circuit is particularly useful for providing a regulated DC potential in a switching power supply.
Inventors
- 👤 Martin H. Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:13
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135; H02M3/137; H02M3/142; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/21; H02M7/217; H02M7/2176; H02M1/00; H02M1/0083; H02M1/0085; H02M7/05
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
An electrical circuit for receiving an AC potential and providing a regulated DC potential to a load comprising: a plurality of paths each including a capacitor and a silicon controlled rectifier (SCR), said paths being coupled to said AC potential; a filter capacitor coupled to said paths to filter the DC current from said SCRs; and, control means for controlling the firing of said SCRs, coupled to the control leads of said SCRs; whereby by selectively controlling the ones of the SCRs which are turned on, the DC potential at said filter capacitor can be regulated.
Claim 2
Dependent Claim
96 words
An electrical circuit for receiving an AC potential and providing a regulated DC potential to a load comprising: a plurality of paths each including a capacitor and a silicon controlled rectifier (SCR), said paths being coupled to said AC potential; a filter capacitor coupled to said paths to filter the DC current from said SCRs; and, control means for controlling the firing of said SCRs, coupled to the control leads of said SCRs; whereby by selectively controlling the ones of the SCRs which are turned on, the DC potential at said filter capacitor can be regulated.
Claim 3
Dependent Claim
29 words
The circuit defined by claim 1 wherein at least some of the capacitors in said paths have different capacitance so as to permit finer regulation of said DC potential.
Claim 4
Dependent Claim
22 words
The circuit defined by claim 1 wherein diodes are coupled to said SCRs and input capacitors to form a voltage doubler rectifier.
Claim 5
Dependent Claim
23 words
The circuit defined by claim 1 or claim 3 wherein inductors are included in series with said capacitors in each of said paths.
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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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |