Integrated Bipolar Transistor Analog Switch
Original Publication Date: 1982-Jun-01
Included in the Prior Art Database: 2005-Feb-09
In many applications, it is desirable to have a switch capable of switching an analog signal varying over a symmetrical wide current range. Unfortunately, the well-known integrated single bipolar transistor switch does not have the above capability owing to the presence of a parasitic substrate transistor, unless a large current flow in the substrate is acceptable. The figure illustrates a two bipolar transistor switch which has the desired capability.