Abstract: A collector-loaded grounded-emitter transistor amplifier output stage employs a temperature-compensated bias network with an auxiliary transistor having its base electrode supplied quiescent current exclusively through a resistive element connecting the base and collector electrodes. A source of input signal is coupled to the base electrode of the auxiliary transistor by capacitative means and decoupled by resistive means from the collector electrode thereof. The temperature stabilizing auxiliary transistor accordingly provides a preliminary amplification of input signals for application to the base electrode of the output stage amplifier transistor, without use of additional active devices.