US4827205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
On-chip voltage supply regulator
Assignee: Pitney Bowes Inc
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Filing: 1987-12-21
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Granted: 1989-05-02
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Expires: 2007-12-21
Abstract
Abstract A voltage regulator fabricated on an integrated circuit chip to provide regulated voltage for the chip assures that the integrated chip is operational before conventionally provided external regulated voltages are available. This enables the integrated circuit chip to be used to monitor the external regulated voltage supplies and prevents latch-up of the integrated circuit due to improper voltages being applied during power sequencing.
Inventors
- 👤 Warren G. Hafner, Jr.
- 👤 John R. Lowdenslager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:45
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/462; G05F1/56
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
An integrated circuit voltage supply regulator circuit in an integrated circuit chip comprising: an operational amplifier in an integrated circuit chip, the operational amplifier having an inverting input, a non-inverting input and an output; a terminal on said chip for connection to an external source of voltage; a resistor connected to the terminal and a reference voltage device, said reference voltage device being connected between the resistor and chip common potential, the reference voltage at a junction of the resistor and the reference voltage device being connected to an input of the operational amplifier; a resistor divider network connected between said terminal and chip ground potential and connected to said operational amplifier for providing a divided voltage corresponding to a desired regulated voltage to the other input of the operational amplifier; the output of the operational amplifier being connected to said terminal to provide on-chip regulated voltage for providing power to the chip.
Claim 2
Dependent Claim
153 words
An integrated circuit voltage supply regulator circuit in an integrated circuit chip comprising: an operational amplifier in an integrated circuit chip, the operational amplifier having an inverting input, a non-inverting input and an output; a terminal on said chip for connection to an external source of voltage; a resistor connected to the terminal and a reference voltage device, said reference voltage device being connected between the resistor and chip common potential, the reference voltage at a junction of the resistor and the reference voltage device being connected to an input of the operational amplifier; a resistor divider network connected between said terminal and chip ground potential and connected to said operational amplifier for providing a divided voltage corresponding to a desired regulated voltage to the other input of the operational amplifier; the output of the operational amplifier being connected to said terminal to provide on-chip regulated voltage for providing power to the chip.
Claim 3
Dependent Claim
15 words
The voltage regulator of claim 1 wherein said reference voltage device is a zener diode.
Claim 4
Dependent Claim
15 words
The voltage regulator of claim 1 wherein said reference voltage device is a band-gap device.
Claim 5
Dependent Claim
150 words
A voltage regulator for an integrated circuit comprising: an operational amplifier in an integrated circuit chip, the operational amplifier having an inverting input, a non-inverting input and an output; a terminal on said chip for connection to an external source of voltage; a resistor connected to the terminal and a reference voltage device, said reference voltage device being connected between the resistor and chip common potential, the reference voltage at a junction of the resistor and the reference voltage device being connected to an input of the operational amplifier; a resistor divider network connected to said operational amplifier for providing a divided voltage corresponding to a desired regulated voltage to the other input of the operational amplifier; the output of the operational amplifier being connected to said terminal to provide on-chip regulated voltage for providing power to the chip; means for providing external power to the terminal on said chip.
Claim 6
Dependent Claim
150 words
A voltage regulator for an integrated circuit comprising: an operational amplifier in an integrated circuit chip, the operational amplifier having an inverting input, a non-inverting input and an output; a terminal on said chip for connection to an external source of voltage; a resistor connected to the terminal and a reference voltage device, said reference voltage device being connected between the resistor and chip common potential, the reference voltage at a junction of the resistor and the reference voltage device being connected to an input of the operational amplifier; a resistor divider network connected to said operational amplifier for providing a divided voltage corresponding to a desired regulated voltage to the other input of the operational amplifier; the output of the operational amplifier being connected to said terminal to provide on-chip regulated voltage for providing power to the chip; means for providing external power to the terminal on said chip.
Claim 7
Dependent Claim
28 words
The voltage regulator of claim 4 wherein said means for providing external power comprises a resistor for dropping an unregulated voltage to a predetermined nominal voltage for regulation.
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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |