US3911353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current stabilizing arrangement
Assignee: US Philips Corp
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Filing: 1974-11-22
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Granted: 1975-10-07
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Expires: 1994-11-22
Abstract
Abstract A current stabilizing arrangement with two current circuits between two common terminals. The ratio of the currents in the two current circuits is defined by a first current dividing circuit and the absolute values of said currents are defined by a second current dividing circuit, in particular by a resistance which is included in said second current dividing circuit. To ensure starting of the current dividing circuit one current circuit includes the low-ohmic input circuits of the two current dividing circuits connected in series between the common terminals and a real impedance is included between said two input circuits with parallel thereto the main current path of a transistor whose control electrode is coupled to the other current circuit.
Inventors
- 👤 De Plassche Rudy Johan Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:01
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/26; G05F3/265; Y; Y10; Y10S; Y10S323/00; Y10S323/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
233 words
A current stabilizing arrangement, which comprises a first and a second current circuit connected between a first and a second supply terminal, said first and second current circuits comprising, a first current dividing circuit with transistors of a first conductivity type, which has an input circuit with a low input impedance and an output circuit with a high output impedance, a second current dividing circuit with transistors of a second conductivity type also having an iNput circuit with a low input impedance and an output circuit with a high output impedance, the first current dividing circuit defining the ratio of the currents flowing in the two current circuits, and the second current dividing circuit defining the absolute values of the two currents which flow in the two current circuits by the parallel connection of a first semiconductor junction with the series connection of a second semiconductor junction and a first resistance, the first current circuit including the series connection of the input circuits of the two current dividing circuits and the second current circuit including the series connection of the output circuits of the two current dividing circuits, a real impedance included in the first current circuit between the input circuits of the two current dividing circuits, a transistor with its main current path connected in shunt with the real impedance, and means coupling the transistor control electrode to the second current circuit.
Claim 2
Dependent Claim
233 words
A current stabilizing arrangement, which comprises a first and a second current circuit connected between a first and a second supply terminal, said first and second current circuits comprising, a first current dividing circuit with transistors of a first conductivity type, which has an input circuit with a low input impedance and an output circuit with a high output impedance, a second current dividing circuit with transistors of a second conductivity type also having an iNput circuit with a low input impedance and an output circuit with a high output impedance, the first current dividing circuit defining the ratio of the currents flowing in the two current circuits, and the second current dividing circuit defining the absolute values of the two currents which flow in the two current circuits by the parallel connection of a first semiconductor junction with the series connection of a second semiconductor junction and a first resistance, the first current circuit including the series connection of the input circuits of the two current dividing circuits and the second current circuit including the series connection of the output circuits of the two current dividing circuits, a real impedance included in the first current circuit between the input circuits of the two current dividing circuits, a transistor with its main current path connected in shunt with the real impedance, and means coupling the transistor control electrode to the second current circuit.
Claim 3
Dependent Claim
46 words
A current stabilizing arrangement as claimed in claim 1 wherein the real impedance has such a resistance value that the current through said impedance at the maximum supply voltage is smaller than the current dictated by the two current dividing circuits in the first current circuit.
Claim 4
Dependent Claim
106 words
A current stabilizing arrangement as claimed in claim 1 wherein the first and second current circuits are connected in parallel between said first and second supply terminals and the first current dividing circuit includes the main current path of a first transistor of said first conductivity type connected in the first current circuit and first diode means connected in the second current circuit, and a second transistor of said first conductivity type with its main current path connected in series with said first diode means in the second current circuit and having a control electrode connected to the input circuit of the first current dividing circuit.
Claim 5
Dependent Claim
52 words
A current stabilizing arrangement as claimed in claim 3 wherein said first semiconductor junction comprises a third transistor of said second conductivity type having a main current path in series in one of said current circuits and the second semiconductor junction is connected in series in the other of said current circuits.
Claim 6
Dependent Claim
62 words
A current stabilizing arrangement as claimed in claim 4 wherein said third transistor is connected in series with the main current path of the first transistor in the first current circuit, and said second semiconductor junction comprises second diode means connected in series with the first diode means and the main current path of the second transistor in the second current circuit.
Claim 7
Dependent Claim
59 words
A current stabilizing arrangement as claimed in claim 4 wherein said third transistor is connected in series with the main current path of the second transistor in the second current circuit, and said second semiconductor junction comprises second diode means connected in series with the first transistor main current path and said real impedance in the first current circuit.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |