ulp amp

55 A t first sight, this amplifier design looks like any other. However, it boasts a number of highly interesting characteristics. To start with, the abbreviation ·"ulp" stands for "ultra low power". This does not refer to the maximum power produced by the amp (100 mW), but rather to the quiescent current consumption which is approximately 1.5 mA. This makes this amplifier particularly suitable for use in a receiver which derives its supply from solar cells. A further advantage is the wide choice of supply voltages. Apart from the maximum output power, of course, the other characteristics remain unchanged, regardless of whether a 3 V or a 12 V supply is used. The voltage gain is not affected ulp amp either. When the considered, ponents appear to be involved. However, they are all without exception "normal" parts. To enable the amp to work well at all supply voltages, a differential amplifier (T1, T2) has been used as an input stage with a current source (T3, T4) in the emitter le...