US5258703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensated voltage regulator having beta compensation
Assignee: NXP USA Inc
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Filing: 1992-08-03
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Granted: 1993-11-02
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Expires: 2012-08-03
Abstract
Abstract A temperature compensated voltage regulator circuit having a first resistor (R X ) disposed in the base circuit between two cascaded transistors and a second resistor (R F ) coupled between the collector and base of the first of the two transistors to provide compensation for beta variations in the transistors resulting from process variables during the manufacture of the circuit.
Inventors
- 👤 Phuc C. Pham
- 👤 Lou Spangler
- 👤 Greg Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/30; G05F3/22; G05F3/222; Y; Y10; Y10S; Y10S323/00; Y10S323/907
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
217 words
A temperature compensated voltage regulator having beta compensation, comprising: first and second power supply conductors for receiving an operating bias potential; a terminal at which a reference potential is developed; a current source coupled between said first power supply conductor and said terminal; first circuit means forming a first series circuit coupled between said terminal and said second power supply conductor including a first transistor having first and second electrodes and a control electrode and first resistive means coupled in series with said terminal and second electrode of said first transistor; second circuit means forming a second series circuit coupled between said terminal and said second power supply conductor including a second transistor having first and second electrodes and a control electrode, a second resistive means coupled in series with said second electrode of said second transistor, and a third resistive means coupled in series with said first electrode of said second transistor; first beta compensation means coupled between said control electrodes of said first and second transistors; second beta compensation means coupled between said second and control electrodes of said first transistor; and third transistor means having first and second electrodes coupled in series with said terminal and said second power supply conductor and a control electrode coupled to said second electrode of said second transistor.
Claim 2
Dependent Claim
217 words
A temperature compensated voltage regulator having beta compensation, comprising: first and second power supply conductors for receiving an operating bias potential; a terminal at which a reference potential is developed; a current source coupled between said first power supply conductor and said terminal; first circuit means forming a first series circuit coupled between said terminal and said second power supply conductor including a first transistor having first and second electrodes and a control electrode and first resistive means coupled in series with said terminal and second electrode of said first transistor; second circuit means forming a second series circuit coupled between said terminal and said second power supply conductor including a second transistor having first and second electrodes and a control electrode, a second resistive means coupled in series with said second electrode of said second transistor, and a third resistive means coupled in series with said first electrode of said second transistor; first beta compensation means coupled between said control electrodes of said first and second transistors; second beta compensation means coupled between said second and control electrodes of said first transistor; and third transistor means having first and second electrodes coupled in series with said terminal and said second power supply conductor and a control electrode coupled to said second electrode of said second transistor.
Claim 3
Dependent Claim
16 words
The voltage regulator of claim 1 wherein said first beta compensation means includes a first resistor.
Claim 4
Dependent Claim
16 words
The voltage regulator of claim 2 wherein said second beta compensation means includes a second resistor.
Claim 5
Dependent Claim
16 words
The voltage regulator of claim 1 wherein said first beta compensation means includes a first resistor.
Claim 6
Dependent Claim
16 words
The voltage regulator of claim 4 wherein said second beta compensation means includes a second resistor.
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) | 1996-11-01 | 1997-05-03 | 1997-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-01 | 2001-05-03 | 2001-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-01 | 2005-05-03 | 2005-11-02 | $7700.00 | Window Closed / Lapsed |