FR2394847A1 - Equal current generating circuit - has each output driven by Darlington pair connected to differential inputs of long-tailed pair - Google Patents
Equal current generating circuit - has each output driven by Darlington pair connected to differential inputs of long-tailed pairInfo
- Publication number
- FR2394847A1 FR2394847A1 FR7817679A FR7817679A FR2394847A1 FR 2394847 A1 FR2394847 A1 FR 2394847A1 FR 7817679 A FR7817679 A FR 7817679A FR 7817679 A FR7817679 A FR 7817679A FR 2394847 A1 FR2394847 A1 FR 2394847A1
- Authority
- FR
- France
- Prior art keywords
- pair
- long
- generating circuit
- differential inputs
- current generating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/08—Regulating voltage or current wherein the variable is dc
- G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
- G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
- G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
- G05F3/22—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the bipolar type only
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
A transistor circuit is used for generating a set of currents which are accurately set equal to each other. It is for use in digital to analogue converters, and uses sensitive differential amplifiers connected in a ring formation. Each current output (In, In-1 .....) is driven by a Darlington pair (T9, T10, T11, T12.....) of n-p-n transistors. These are connected to the differential inputs of long tailed pair differential amplifiers consisting of n-p-n transistor pairs (T2, T3, T4, T5)....., T8, T1) and associated resistors (R1, R2....R8). Each differential amplifier equalises the current produced at that stage with the neighbouring stage, provided the resistances in the two stages are equal. The ring formation guarantees the equality of the first and last stages.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD19944477A DD131702B1 (en) | 1977-06-13 | 1977-06-13 | CIRCUIT WITH A VARIETY OF DIFFERENT ELECTRICITY GENERATORS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2394847A1 true FR2394847A1 (en) | 1979-01-12 |
| FR2394847B1 FR2394847B1 (en) | 1983-08-19 |
Family
ID=5508694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7817679A Granted FR2394847A1 (en) | 1977-06-13 | 1978-06-13 | Equal current generating circuit - has each output driven by Darlington pair connected to differential inputs of long-tailed pair |
Country Status (6)
| Country | Link |
|---|---|
| DD (1) | DD131702B1 (en) |
| DE (1) | DE2824092C2 (en) |
| FR (1) | FR2394847A1 (en) |
| HU (1) | HU177837B (en) |
| PL (1) | PL115695B1 (en) |
| SU (1) | SU949804A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61240716A (en) * | 1985-04-17 | 1986-10-27 | Mitsubishi Electric Corp | Digital-analog converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3675114A (en) * | 1971-06-14 | 1972-07-04 | Forbro Design Corp | High current voltage/current regulator employing a plurality of parallel connected power transistors |
| US3754181A (en) * | 1970-12-09 | 1973-08-21 | Itt | Monolithic integrable constant current source for transistors connected as current stabilizing elements |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1266886A (en) * | 1968-10-03 | 1972-03-15 |
-
1977
- 1977-06-13 DD DD19944477A patent/DD131702B1/en not_active IP Right Cessation
-
1978
- 1978-05-16 SU SU787770197A patent/SU949804A1/en active
- 1978-06-01 DE DE19782824092 patent/DE2824092C2/en not_active Expired
- 1978-06-12 HU HUKE001023 patent/HU177837B/en unknown
- 1978-06-13 FR FR7817679A patent/FR2394847A1/en active Granted
- 1978-06-13 PL PL20759178A patent/PL115695B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3754181A (en) * | 1970-12-09 | 1973-08-21 | Itt | Monolithic integrable constant current source for transistors connected as current stabilizing elements |
| US3675114A (en) * | 1971-06-14 | 1972-07-04 | Forbro Design Corp | High current voltage/current regulator employing a plurality of parallel connected power transistors |
Also Published As
| Publication number | Publication date |
|---|---|
| SU949804A1 (en) | 1982-08-07 |
| PL115695B1 (en) | 1981-04-30 |
| FR2394847B1 (en) | 1983-08-19 |
| DD131702B1 (en) | 1980-02-13 |
| DE2824092A1 (en) | 1978-12-21 |
| PL207591A1 (en) | 1979-04-23 |
| DD131702A1 (en) | 1978-07-12 |
| DE2824092C2 (en) | 1982-01-14 |
| HU177837B (en) | 1981-12-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse | ||
| AR | Application made for restoration | ||
| BR | Restoration of rights | ||
| ST | Notification of lapse |