Patent US3787734A successfully refreshed from Google Patents.
US3787734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator and constant current source for a current switch logic system
Assignee: International Business Machines Corp
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Filing: 1972-05-26
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Granted: 1974-01-22
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Expires: 1992-05-26
Abstract
Abstract A voltage regulator circuit for energizing a constant current source for use in a current switch logic scheme.
Inventors
- 👤 J Dorler
- 👤 D Swietek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:14
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/22; G05F3/222; G05F3/227; H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082; H03K19/086
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
In a current switch circuit having at least one input switching transistor and a reference transistor connected thereto, the reference transistor being adapted for direct connection to a first reference voltage supply, the improvement comprising: a. an active element current source means connected to said at least one input switching transistor and to said reference transistor for providing a regulated current to the current switch circuit, b. a first translating and inverting circuit means being connected at its input terminal (52) to the first reference voltage supply and at its output terminal (56) to said active element current source means, said first translating and inverting circuit means being responsive to the first reference voltage supply for generating a translated inverted driving voltage for controlling said active element current source means.
Claim 2
Dependent Claim
130 words
In a current switch circuit having at least one input switching transistor and a reference transistor connected thereto, the reference transistor being adapted for direct connection to a first reference voltage supply, the improvement comprising: a. an active element current source means connected to said at least one input switching transistor and to said reference transistor for providing a regulated current to the current switch circuit, b. a first translating and inverting circuit means being connected at its input terminal (52) to the first reference voltage supply and at its output terminal (56) to said active element current source means, said first translating and inverting circuit means being responsive to the first reference voltage supply for generating a translated inverted driving voltage for controlling said active element current source means.
Claim 3
Dependent Claim
67 words
In a current switch circuit having at least one input switching transistor and a reference transistor connected thereto, the reference transistor being adapted for connection to a first reference voltage supply, as in claim 1 wherein: a. said active element current source means comprises a first transistor and resistor combination, the base terminal of said first transistor being connected to said first translating and inverting circuit means.
Claim 4
Dependent Claim
89 words
In a current switch circuit having at least one input switching transistor and a reference transistor connected thereto, the reference transistor being adapted for connection to a first reference voltage supply, as in claim 2 wherein: a. said active element current source means and said first translating and inverting circuit means include first and second terminals adapted for connection to a second voltage supply, wherein b. the difference between said driving voltage and said second voltage supply provides a resultant voltage source to said Active element current source means.
Claim 5
Dependent Claim
51 words
In a current switch circuit having at least one input switching transistor and a reference transistor connected thereto, the reference transistor being adapted for connection to a first reference voltage supply, as in claim 3 wherein: a. said first translating and inverting circuit means includes semiconductor device amplifying and inverting means.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |