Voltage divider circuit providing intermediate voltage between two supply values - includes resistive bridge setting value, with two transistors supplying capacitors which maintain output voltage level without excessive power loss

摘要

The voltage divider is connected to two main supply terminals (3a,3b) of a direct voltage source, and to a secondary terminal (4c) providing the intermediate output voltage. The voltage divider includes two capacitors (1a,1b) each having a terminal connected to a main supply terminal, and one terminal connected in common to the output (4c). The emitter-collector junctions of two transistors (NPN-14a and PNP-14b) are connected across the capacitors, with their bases symmetrical w.r.t. the intermediate voltage fixed by a resistance bridge (12a,12b). ADVANTAGE - Current taken from source is equal to current delivered to auxiliary circuits. Delivers precise quantity of current necessary for supplying auxiliary devices, minimising voltage variations.