Patent US4453121A successfully refreshed from Google Patents.
US4453121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reference voltage generator
Assignee: Motorola Solutions Inc
•
Filing: 1981-12-21
•
Granted: 1984-06-05
•
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 19:41
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.
References Cited (Backward Citations)
US3911268A
Cited
US3975649A
Cited
US3975648A
Cited
US4103219A
Cited
US4287438A
Cited
US4260946A
Cited
US4362984A
Cited
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 |