US5034626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
BIMOS current bias with low temperature coefficient
Assignee: Motorola Solutions Inc
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Filing: 1990-09-17
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Granted: 1991-07-23
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Expires: 2010-09-17
Abstract
Abstract A current bias generator (10) with a low temperature coefficient sums the currents (13 and 16) from a bipolar current generator (12) and a MOS current generator (14) having opposite temperature coefficients to provide a low temperature coefficient bias current.
Inventors
- 👤 Yolanda M. Pirez
- 👤 Kha H. Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:21
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/26; G05F3/262; Y; Y10; Y10S; Y10S323/00; Y10S323/907
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
A current bias generator with a low temperature coefficient, comprising: a bipolar current generator having a first temperature coefficient to provide a first current; a MOS current generator having a second temperature coefficient of an opposite polarity from said first temperature coefficient of said bipolar current generator to provide a second current; and current summing means to sum said first and second currents to provide a low temperature coefficient bias current.
Claim 2
Dependent Claim
71 words
A current bias generator with a low temperature coefficient, comprising: a bipolar current generator having a first temperature coefficient to provide a first current; a MOS current generator having a second temperature coefficient of an opposite polarity from said first temperature coefficient of said bipolar current generator to provide a second current; and current summing means to sum said first and second currents to provide a low temperature coefficient bias current.
Claim 3
Dependent Claim
18 words
The current bias generator of claim 1 wherein said bipolar current generator comprises a bipolar current mirror amplifier.
Claim 4
Dependent Claim
18 words
The current bias generator of claim 1 wherein said MOS current generator comprises a MOS current mirror amplifier.
Claim 5
Dependent Claim
18 words
The current bias generator of claim 1 wherein said bipolar current generator includes at least one bipolar transistor.
Claim 6
Dependent Claim
18 words
The current bias generator of claim 1 wherein said MOS current generator includes at least one MOSFET transistor.
Claim 7
Dependent Claim
25 words
The current bias generator of claim 1 wherein said current generators are scaled to provide a desired magnitude of said low temperature coefficient bias current.
Claim 8
Dependent Claim
98 words
A monolithic integrated current bias generator circuit with a low temperature coefficient, comprising: a substrate; a bipolar current generator formed on said substrate including at least one bipolar transistor having a negative temperature coefficient to provide a first current of one polarity; a MOS current generator formed on said substrate including at least one MOSFET having a positive temperature coefficient to provide a second current of an opposite polarity from said bipolar current generator; and MOS current summing means formed on said substrate to sum said first and second currents to provide a low temperature coefficient bias current.
Claim 9
Dependent Claim
98 words
A monolithic integrated current bias generator circuit with a low temperature coefficient, comprising: a substrate; a bipolar current generator formed on said substrate including at least one bipolar transistor having a negative temperature coefficient to provide a first current of one polarity; a MOS current generator formed on said substrate including at least one MOSFET having a positive temperature coefficient to provide a second current of an opposite polarity from said bipolar current generator; and MOS current summing means formed on said substrate to sum said first and second currents to provide a low temperature coefficient bias current.
Claim 10
Dependent Claim
103 words
A monolithic integrated current bias generator circuit with a low temperature coefficient for a radio, comprising: a substrate for a radio; a first current mirror formed on said substrate including at least one bipolar transistor having a negative temperature coefficient to provide a first current of one polarity; and a second current mirror formed on said substrate including at least one MOSFET having a positive temperature coefficient to provide a second current of an opposite polarity from said bipolar current generator and coupled to said first current mirror to sum said first and second currents to provide a low temperature coefficient bias current.
Claim 11
Dependent Claim
103 words
A monolithic integrated current bias generator circuit with a low temperature coefficient for a radio, comprising: a substrate for a radio; a first current mirror formed on said substrate including at least one bipolar transistor having a negative temperature coefficient to provide a first current of one polarity; and a second current mirror formed on said substrate including at least one MOSFET having a positive temperature coefficient to provide a second current of an opposite polarity from said bipolar current generator and coupled to said first current mirror to sum said first and second currents to provide a low temperature coefficient bias current.
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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) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |