Temperature-independent variable-current source

专利名称：Temperature-independent variable-current

source

发明人：Betti, Giorgio,Zuffada, Maurizio,Sacchi,

Fabrizio,Gornati, Silvano

申请号：EP90107222.3申请日：19900417公开号：EP0394805A3公开日：19910731

专利附图：

摘要：This variable-current source comprises a differential stage (10) and a pair ofvoltage buffers (11,12) which respectively receive, at the input, a variable input voltage (V)and a reference voltage (V) and are connected at the output to the differential stage.Both buffers comprise a resistor (R₁,R₂) flown by a current which varies only as a functionof the respective input voltage and of its resistance and therefore depends thermallyexclusively on this resistance, and provide output voltages (V₁,V₂) which depend uponthese currents, so that the output current generated by the differential stage (10) is

temperature-independent.

申请人：SGS-THOMSON MICROELECTRONICS S.r.l.

地址：Via C. Olivetti, 2 I-20041 Agrate Brianza (Milano) IT

国籍：IT

代理机构：Modiano, Guido, Dr.-Ing.

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