| 摘要 |
<p>A transconductance amplifier (3) comprises a differential amplifier (T11, T12), 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, R.) a fraction of a temperature-independent voltage is applied between the control electrodes 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.</p> |
