US5086238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor supply incorporating internal power supply for compensating for deviation in operating condition and fabrication process conditions
Assignee: Renesas Technology Corp
•
Filing: 1990-11-05
•
Granted: 1992-02-04
•
Expires: 2010-11-05
Abstract
Abstract A semiconductor integrated circuit includes a semiconductor chip, a power supply terminal provided on the semiconductor chip for receiving a voltage from an external power supply source, an internal circuit provided on the semiconductor chip, a power supply circuit provided on the senmiconductor chip for transforming an external power supply voltage received from the power supply terminal for supplying a source voltage resulting from the voltage transformation to the internal circuit. A control circuit provided on the semiconductor chip controls the power supply circuit, wherein the control circuit includes external power supply voltage detector and/or temperature detector and responds to the signal from the external power supply voltage detector by changing the power supply voltage to the internal circuit. Thus, the operating speed of the internal circuit is kept substantially constant.
Inventors
- 👤 Takao Watanabe
- 👤 Ryoichi Hori
- 👤 Goro Kitsukawa
- 👤 Yoshiki Kawajiri
- 👤 Takayuki Kawahara
- 👤 Kiyoo Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:33
CPC Classifications
G; G11; G11C; G11C5/00; G11C5/14; G11C5/147; H; H03; H03K; H03K19/00; H03K19/003; H03K19/00369; H03K19/00376; H03K19/00384; H03K19/01; H03K19/017; H03K19/01707; H03K2217/00; H03K2217/0036; Y; Y10; Y10S; Y10S323/00; Y10S323/907
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
83 words
A semiconductor circuit device comprising a load and an internal power supply circuit, said internal power supply circuit comprising: a reference voltage generator generating a first reference voltage from an external voltage; and means, provided between said reference voltage generator and the load, for converting said first reference voltage into an internal supply voltage, for supplying the internal supply voltage to said load and for buffering the change of current consumed in said load; wherein said reference voltage generator includes a band-gap generator.
Claim 2
Dependent Claim
83 words
A semiconductor circuit device comprising a load and an internal power supply circuit, said internal power supply circuit comprising: a reference voltage generator generating a first reference voltage from an external voltage; and means, provided between said reference voltage generator and the load, for converting said first reference voltage into an internal supply voltage, for supplying the internal supply voltage to said load and for buffering the change of current consumed in said load; wherein said reference voltage generator includes a band-gap generator.
Claim 3
Dependent Claim
15 words
A device according to claim 1, wherein said band-gap generator includes an NPN bipolar transistor.
Claim 4
Dependent Claim
16 words
A device according to claim 2, wherein said bipolar transistor is formed on a p-type substrate.
Claim 5
Dependent Claim
15 words
A device according to claim 1, wherein said means for buffering includes a differential amplifier.
Claim 6
Dependent Claim
40 words
A device according to claim 1, further comprising: an operation switch provided to control the internal power supply circuit between different power supply modes to the device in accordance with a stand-by state or an operating state of said load.
Claim 7
Dependent Claim
13 words
A device according to claim 1, wherein said load includes a CMOS circuit.
Claim 8
Dependent Claim
13 words
A device according to claim 1 wherein said load includes a Bi-CMOS circuit.
Claim 9
Dependent Claim
14 words
A device according to claim 5 wherein said load further includes a Bi-CMOS circuit.
Claim 10
Dependent Claim
18 words
A device according to claim 1, wherein said means for buffering includes a p-MOS circuit for its output.
Claim 11
Dependent Claim
23 words
A device according to claim 1, said first reference voltage is controlled relative to the temperature of the device and said external voltage.
Claim 12
Dependent Claim
40 words
A device according to claim 4, further comprising an operation switch provided to control the internal power supply circuit between different power supply modes to the device in accordance with a stand-by state or an operating state of said load.
Claim 13
Dependent Claim
15 words
A device according to claim 6 wherein said band-gap generator includes an NPN bipolar transistor.
Claim 14
Dependent Claim
16 words
A device according to claim 12 wherein said bipolar transistor is formed on a p-type substrate.
Claim 15
Dependent Claim
15 words
A device according to claim 6 wherein said means for buffering includes a differential amplifier.
References Cited (Backward Citations)
US4274014A
Cited
US4358728A
Cited
US4361797A
Cited
US4473762A
Cited
US4482985A
Cited
US4430582A
Cited
US4618788A
Cited
US4616146A
Cited
US4843265A
Cited
US4806804A
Cited
US4873673A
Cited
US4791326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |