Current-source arrangement

Details Current-source arrangement Current-source arrangement

H - Electricity

03

F

330/20, 330/33,

H03F 1/30 (2006.01) G05F 3/26 (2006.01) H03F 3/45 (2006.01)

Patent

CA 1205150

A transconductance amplifier (3) comprises a differential amplifier (T11, T.12), whose collector load is a current mirror (T13, T14, T15, R9, R10) having a current output (8). A current-source transistor (T10) arranged in the common emitter line supplies a current having a positive temperature-dependence. This current is obtained from a current-stabilising circuit (1). By means of a voltage divider (R7, R8) a fraction of a temperature- independent voltage is applied between the control elec- trodes of the differential amplifier (T11, T12), Which voltage is taken from a voltage-stabilising circuit (2). Depending on the value of this fraction the output current on the output (8) is temperature-independent or has a negative temperature-dependence.

450703

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