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circuit for connecting a first node with a second or third node according to the potential of the latter, to control the potential of a isolationsbereiches within an integrated circuit in dependence on the substratspannung
circuit for connecting a first node with a second or third node according to the potential of the latter, to control the potential of a isolationsbereiches within an integrated circuit in dependence on the substratspannung
In a switching circuit suitable for connecting a first circuit node (1) to a second (2) or to a third (3) circuit node in relation to the latter's potential, particularly for controlling the potential of an insulation region of an integrated circuit in relation to the substrate's potential, there is a first NPN bipolar transistor (T1) with the function of a switch having the collector connected to the first circuit node (1) and the emitter connected to the second circuit node (2) and a second NPN bipolar transistor (T2) with the function of a switch having the collector connected to the first circuit node (1) and the emitter connected to the third circuit node (3). There are means (D1, T5, T6) for maintaining the base of the second transistor (T2) at a constant pre-set bias voltage. IMAGE
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