Patent US5631549A successfully refreshed from Google Patents.
US5631549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear regulator power supply with an overcurrent protection device
Assignee: WiniaDaewoo Co Ltd
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Filing: 1995-02-23
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Granted: 1997-05-20
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Expires: 2015-02-23
Abstract
Abstract An improved regulator apparatus comprises a regulation unit, in response to an operation signal, for regulating an input voltage to provide a regulated voltage to its dependent load and an overcurrent protection unit for blocking the operation of the regulation unit when a short-circuiting occurs in the load. The overcurrent protection unit includes a bypass transistor for bypassing the operation signal to the regulation unit and a diode for sensing the change in the potential level of the regulated voltage to activate the bypass transistor.
Inventors
- 👤 Jae-Gyoo Hong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565; G05F1/569; G05F1/571; G05F1/573; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/16576
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A linear regulator power supply comprising: a plurality of regulation units, each of the regulation units having a switching transistor for providing a regulated voltage to a load connected to an output terminal thereof, means for producing a reference voltage and an operational amplifier for generating a switching signal to activate the switching transistor using a difference between the reference voltage and a comparison voltage; and means, connected between the load and the operational amplifier, for coupling the reference voltage to ground when there is a drop in the potential level of the regulated voltage due to a short circuiting occurred on the load, thereby making the operational amplifier inactive and the switching transistor inoperable.
Claim 2
Dependent Claim
115 words
A linear regulator power supply comprising: a plurality of regulation units, each of the regulation units having a switching transistor for providing a regulated voltage to a load connected to an output terminal thereof, means for producing a reference voltage and an operational amplifier for generating a switching signal to activate the switching transistor using a difference between the reference voltage and a comparison voltage; and means, connected between the load and the operational amplifier, for coupling the reference voltage to ground when there is a drop in the potential level of the regulated voltage due to a short circuiting occurred on the load, thereby making the operational amplifier inactive and the switching transistor inoperable.
Claim 3
Dependent Claim
53 words
The linear regulator power supply of claim 1, wherein the coupling means includes a bypass transistor being turned-on in accordance with the drop in the potential level, the bypass transistor having a base connected to the output terminal, an emitter connected to the reference voltage providing means and a collector connected to ground.
Claim 4
Dependent Claim
64 words
The linear regulator power supply of claim 2, further comprising a parallel circuitry having a plurality of diodes, each of the diodes being connected between the base of the bypass transistor and the load and being forward biased by the drop in the potential level of the regulated voltage to connect the drop in the potential level to the base of the bypass transistor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-05-19 | 2000-11-18 | 2001-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-19 | 2004-11-18 | 2005-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-19 | 2008-11-18 | 2009-05-20 | $7700.00 | Window Closed / Lapsed |