Abstract: The present invention relates to a group of unique diazabicyclo alkane derivatives having interesting neurokinin-NK1 receptor antagonistic activity represented by the general formula (1) wherein: R1 represents phenyl, 2-indolyl, 3-indolyl, 3-indazolyl or benzo[b]thiophen-3-yl, which groups may be substituted with halogen or alkyl (1-3C), R2 and R3 independently represent halogen, H, OCH3, CH3 and CF3, R4, R5 and R6 independently represent H, OH, O-alkyl(1-4C), CH2OH, NH2, dialkyl(1-3C)N, pyrrolidin-1-yl, piperidin-1-yl, morpholin-4-yl or morpholin-4-yl substituted with one or two methyl or methoxymethyl groups, morpholin-4-ylamino, morpholin-4-ylmethyl, imidazol-1-yl, thiomorpholin-4-yl, 1,1-dioxothiomorpholin-4-yl or 3-oxa-8-azabicyclo[3.2.

Abstract: A controllable current source having a high impedance at a control input which for this purpose is connected to a non-fed back input of an operational amplifier present therein, while the amplifier output is fed back to a second amplifier input through a transistor whose collector is connected, possibly through a non-linear resistance network, to the second input which is furthermore connected via a resistor to a supply terminal, the transistor being incorporated in a current mirror circuit including a second transistor supplying the output current at the collector.