US4453121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reference voltage generator
Assignee: Motorola Solutions Inc
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Filing: 1981-12-21
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Granted: 1984-06-05
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Expires: 2001-12-21
Abstract
Abstract A reference voltage generator uses a resistor divider technique to develop a reference voltage, but a resistor is replaced by a transistor to provide improved compensation for changes in a power supply voltage. The transistor is coupled to provide resistance which varies inversely to variations in power supply voltage.
Inventors
- 👤 Glenn E. Noufer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:42
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/24; G05F3/242; G05F3/247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A reference voltage generator comprising: a resistor having a first terminal coupled to a first power supply terminal and a second terminal; a first insulated gate field effect transistor having a first current electrode coupled to the second terminal of the resistor, a control electrode directly connected to the first power supply terminal, and a second current electrode; a second insulated gate field effect transistor having a first current electrode and a control electrode coupled to the second current electrode of the first insulated gate field effect transistor, and a second current electrode coupled to a second power supply terminal; and a third insulated gate field effect transistor having a first current electrode directly connected to the first power supply terminal, a control electrode directly connected to the second terminal of the resistor; and a second current electrode for providing a reference voltage; wherein the first, second, and third insulated gate field effect transistors are of the same conductivity type.
Claim 2
Dependent Claim
160 words
A reference voltage generator comprising: a resistor having a first terminal coupled to a first power supply terminal and a second terminal; a first insulated gate field effect transistor having a first current electrode coupled to the second terminal of the resistor, a control electrode directly connected to the first power supply terminal, and a second current electrode; a second insulated gate field effect transistor having a first current electrode and a control electrode coupled to the second current electrode of the first insulated gate field effect transistor, and a second current electrode coupled to a second power supply terminal; and a third insulated gate field effect transistor having a first current electrode directly connected to the first power supply terminal, a control electrode directly connected to the second terminal of the resistor; and a second current electrode for providing a reference voltage; wherein the first, second, and third insulated gate field effect transistors are of the same conductivity type.
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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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |