US4490669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit configuration for generating a temperature-independent reference voltage
Assignee: Siemens AG
•
Filing: 1982-09-08
•
Granted: 1984-12-25
•
Expires: 2002-09-08
Abstract
Abstract Bandgap circuit for generating a temperature-independent reference voltage, including a diode-resistance path at which a temperature-independent reference voltage corresponding to the energy gap of semiconductor material of components used in the circuit is available, the diode-resistance path including a diode and a series circuit of at least two resistors being connected in parallel with the diode, a temperature-independent reference voltage which is independent of the energy gap of the semiconductor material being available at one of the resistors.
Inventors
- 👤 Wilhelm Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:41
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
82 words
Voltage reference circuit arrangement based on energy gap voltage including a diode-resistance path at which a temperature-independent reference voltage corresponding to the energy gap of semiconductor material of components used in the circuit is available, the diode-resistance path comprising a diode and a series circuit of at least two resistors being connected in parallel with said diode, a temperature-independent reference voltage which is an independent fraction of the energy gap voltage of the semiconductor material being available at one of said resistors.
Claim 2
Dependent Claim
82 words
Voltage reference circuit arrangement based on energy gap voltage including a diode-resistance path at which a temperature-independent reference voltage corresponding to the energy gap of semiconductor material of components used in the circuit is available, the diode-resistance path comprising a diode and a series circuit of at least two resistors being connected in parallel with said diode, a temperature-independent reference voltage which is an independent fraction of the energy gap voltage of the semiconductor material being available at one of said resistors.
Claim 3
Dependent Claim
89 words
Bandgap circuit for generating a temperature-independent reference voltage, comprising: a forward current-biased diode formed by a transistor base-emitter junction in parallel connection with a series combination of at least two resistors, a temperature independent voltage connected across the forward biased diode, a temperature-independent fractional reference voltage being provided across a first one of said series connected resistors, said fractional voltage independently selectable as the ratio of said first one of said at least two resistors and the sum of all of said resistors multiplied by said temperature independent voltage.
Claim 4
Dependent Claim
89 words
Bandgap circuit for generating a temperature-independent reference voltage, comprising: a forward current-biased diode formed by a transistor base-emitter junction in parallel connection with a series combination of at least two resistors, a temperature independent voltage connected across the forward biased diode, a temperature-independent fractional reference voltage being provided across a first one of said series connected resistors, said fractional voltage independently selectable as the ratio of said first one of said at least two resistors and the sum of all of said resistors multiplied by said temperature independent voltage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |