Analog voltage output circuit.

摘要

An integrated circuit (1) has reference terminals (2,3,4) for earth and two supplied potentials also test and test command terminals (6) (7). An internal supply circuit (5) is controlled by a command terminal (11) and has input and output terminals (9) (10). An output voltage circuit (8) has isolating transistors (12, 13) connected in series between the internal output and test terminals (10) (6). Two switching circuits (14) (15) connect the grids of the isolating transistors to the test, reference and internal output terminals according to the test command terminal voltage state.