EP 0910002 B1 20090121 - Method for providing a current of high accuracy
Title (en)
Method for providing a current of high accuracy
Title (de)
Verfahren zur Herstellung eines sehr genauen Stroms
Title (fr)
Moyens pour fournir un courant de grande précision
Publication
Application
Priority
EP 97117804 A 19971015
Abstract (en)
[origin: EP0910002A1] The current source uses an additional transistor to provide precise control of current about nominal value. The current is provided by a first transistor (T3) through which the first current passes. An operational amplifier (A2) has a first input to which a reference voltage (Vref) is applied, and at the output of which is a signal for controlling the first transistor. An external resistance (Re1) is also connected to the second input. A further transistor (T4) is provided through which a second current passes (I4), passing also through the external resistor.
IPC 8 full level
G05F 1/56 (2006.01); G05F 3/24 (2006.01); H03F 1/30 (2006.01)
CPC (source: EP US)
G05F 3/24 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0910002 A1 19990421; EP 0910002 B1 20090121; AT E421723 T1 20090215; DE 69739232 D1 20090312; JP H11249751 A 19990917; TW 437137 B 20010528; US 6137273 A 20001024
DOCDB simple family (application)
EP 97117804 A 19971015; AT 97117804 T 19971015; DE 69739232 T 19971015; JP 29068898 A 19981013; TW 87116619 A 19981007; US 17316298 A 19981015