Patent US5223743A successfully refreshed from Google Patents.
US5223743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adaptive current generating transconductance circuit
Assignee: Toshiba Corp
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Filing: 1992-04-24
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Granted: 1993-06-29
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Expires: 2012-04-24
Abstract
Abstract An adaptive current generating circuit having a reference voltage supply circuit for supplying a reference voltage subjected to a fluctuation of supply voltage, a reference current supply circuit for supplying reference current responsive to the reference voltage supplied by the reference voltage supply circuit, a control current supply circuit for supplying control current subjected to the fluctuation of the supply voltage and a bias supply circuit for supplying a bias to the reference current supply circuit corresponding to a difference between the reference current supplied by the reference current supply circuit and the control current supplied by the control current supply circuit.
Inventors
- 👤 Chikashi Nakagawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:58
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; H; H03; H03F; H03F3/00; H03F3/45; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/22; G05F3/222; G05F3/227; H03F3/45071; H03F2203/00; H03F2203/45; H03F2203/45018; H03F2203/45021; H03F2203/45178; H03F2203/45188; H03F2203/45201; H03F2203/45351; H03F2203/45466
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
An adaptive current generating circuit comprising: a power supply for generating a power supply voltage; means for generating a reference voltage from said power supply voltage, said reference voltage generating means being subjected to a fluctuation of said power supply voltage; means for generating a reference current responsive to said reference voltage, said reference current generating means including a transconductance circuit; means for generating a control current from said power supply voltage, said control current being subjected to said fluctuation of the supply voltage; and means for generating a bias current corresponding to a difference between said reference current and said control current, and for supplying said bias current to said reference current generating means for controlling said reference current.
Claim 2
Dependent Claim
120 words
An adaptive current generating circuit comprising: a power supply for generating a power supply voltage; means for generating a reference voltage from said power supply voltage, said reference voltage generating means being subjected to a fluctuation of said power supply voltage; means for generating a reference current responsive to said reference voltage, said reference current generating means including a transconductance circuit; means for generating a control current from said power supply voltage, said control current being subjected to said fluctuation of the supply voltage; and means for generating a bias current corresponding to a difference between said reference current and said control current, and for supplying said bias current to said reference current generating means for controlling said reference current.
Claim 3
Dependent Claim
31 words
The adaptive current generating circuit of claim 1, wherein the reference voltage generating means comprises means for dividing said power supply voltage, said voltage dividing means including at least one resistor.
Claim 4
Dependent Claim
25 words
The adaptive current generating circuit of claim 1, wherein the reference current supply means contains a differential circuit and a single ended push-pull amplifier circuit.
Claim 5
Dependent Claim
48 words
The adaptive current generating circuit of claim 1, wherein the control current generating means includes an impedance including at least one resistor or variable resistor, means for supplying a voltage responsive to said power supply voltage to said impedance, and means for outputting a current from the impedance.
Claim 6
Dependent Claim
27 words
The adaptive current generating circuit of claim 1, wherein the bias supply means contains means for amplifying a difference between the reference current and the control current.
Claim 7
Dependent Claim
20 words
The adaptive current generating circuit of claim 1, said means for generating a reference current further including a current mirror.
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) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |