US4249123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensated reference voltage regulator
Assignee: Texas Instruments Inc
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Filing: 1978-10-25
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Granted: 1981-02-03
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Expires: 1998-10-25
Abstract
Abstract A differential reference voltage regulator for I 2 L silicon integrated circuits having temperature compensation means including a temperature reference transistor and a balance resistance, R2, connected in series between a reference resistance, R1, and a current source transistor wherein ##EQU1## where n is the ratio of currents applied to a pair of transistors which form a differential regulator.
Inventors
- 👤 Stephen C. Kwan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/30; Y; Y10; Y10S; Y10S323/00; Y10S323/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
245 words
A temperature compensated reference voltage regulator comprising: current source transistor means for providing a first current, a second current, and a third current n times greater than the first current, where n is greater than unity, each of the first, second and third currents being proportional to an applied drive current; first drive transistor means for applying drive current to the current source transistor means in proportion to an applied drive current; second drive transistor means for applying a portion of the third current as drive current to the first drive transistor in proportion to an applied drive current; third drive transistor means for applying a portion of the first current as drive current to the second drive transistor means in proportion to an applied reference voltage; reference resistance means for applying a reference voltage to the third drive transistor means in proportion to an applied reference current; and temperature compensation means for applying a portion of the second current as reference current to the reference resistance means in proportion to the temperature of the temperature compensating means, wherein the temperature compensation means comprises a temperature reference transistor means and a balancing resistance means connected in series to apply the second current provided by the current source transistor means to the reference resistance means, the temperature reference transistor means having a V BE proportional to the temperature thereof, and the balancing resistance means having a resistance ratio to the reference resistance means of about ##EQU7##
Claim 2
Dependent Claim
245 words
A temperature compensated reference voltage regulator comprising: current source transistor means for providing a first current, a second current, and a third current n times greater than the first current, where n is greater than unity, each of the first, second and third currents being proportional to an applied drive current; first drive transistor means for applying drive current to the current source transistor means in proportion to an applied drive current; second drive transistor means for applying a portion of the third current as drive current to the first drive transistor in proportion to an applied drive current; third drive transistor means for applying a portion of the first current as drive current to the second drive transistor means in proportion to an applied reference voltage; reference resistance means for applying a reference voltage to the third drive transistor means in proportion to an applied reference current; and temperature compensation means for applying a portion of the second current as reference current to the reference resistance means in proportion to the temperature of the temperature compensating means, wherein the temperature compensation means comprises a temperature reference transistor means and a balancing resistance means connected in series to apply the second current provided by the current source transistor means to the reference resistance means, the temperature reference transistor means having a V BE proportional to the temperature thereof, and the balancing resistance means having a resistance ratio to the reference resistance means of about ##EQU7##
Claim 3
Dependent Claim
35 words
The regulator of claim 1 wherein the temperature compensation means further comprises resistance means connected to the temperature reference transistor means to limit the flow of the second current through the temperature reference transistor means.
Claim 4
Dependent Claim
35 words
The regulator of claim 1, or 2 further comprising: amplifing transistor means interposed between the current source transistor means and the temperature compensation means for amplifing the second current applied to the temperature compensation means.
References Cited (Backward Citations)
US3893017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |