Title (en)

Constant-current source.

Title (de)

Konstantstromquelle.

Title (fr)

Source de courant constante.

Publication

EP 0650112 A3 19950830 (DE)

Application

EP 94115731 A 19941006

Priority

DE 4335683 A 19931020

Abstract (en)

[origin: EP0650112A2] The invention relates to a constant-current source which contains two JFETs and a simple resistance network. In this arrangement, the current saturation current is measured by a JFET and converted by the resistance network into a control voltage for the other JFET which generates the desired constant current. Such a circuit can be used for compensating within a wide range for production tolerances, particularly those of the JFETs and for temperature fluctuations due to operation. <IMAGE>

IPC 1-7

G05F 3/26

IPC 8 full level

G05F 3/24 (2006.01); G05F 3/26 (2006.01)

CPC (source: EP US)

G05F 3/24 (2013.01 - EP US)

Citation (search report)

• [A] US 5065043 A 19911112 - BARTLING JAMES E [US], et al
• [A] GB 2211322 A 19890628 - GAZELLE MICROCIRCUITS INC [US]
• [A] GB 2211321 A 19890628 - GAZELLE MICROCIRCUITS INC [US]
• [A] EP 0353039 A1 19900131 - GEN ELECTRIC [US]
• [A] US 5166553 A 19921124 - KOTERA NOBUO [JP], et al
• [A] TOUMAZOU C ET AL: "DESIGN AND APPLICATION OF GAAS MESFET CURRENT MIRROR CIRCUITS", IEE PROCEEDINGS G. ELECTRONIC CIRCUITS & SYSTEMS, vol. 137, no. 2, PART G, 1 April 1990 (1990-04-01), pages 101 - 108, XP000102777

Designated contracting state (EPC)

DE ES FR GB IT NL SE

DOCDB simple family (publication)

EP 0650112 A2 19950426; EP 0650112 A3 19950830; EP 0650112 B1 19980805; DE 4335683 A1 19950427; DE 59406607 D1 19980910; ES 2121595 T3 19981201; US 5488328 A 19960130

DOCDB simple family (application)

EP 94115731 A 19941006; DE 4335683 A 19931020; DE 59406607 T 19941006; ES 94115731 T 19941006; US 32649794 A 19941020