SIGNAL LEVEL SWITCHING CIRCUIT

摘要

A signal level switching circuit is disclosed which comprises input resistors (2a, 2b) connected between signal input terminals (1a, 1b) and output terminals (5a, 5b) for connection with a receiving circuit (6), a switching circuit (3) which is composed of a plurality of switching devices and connected with the output terminals (5a, 5b), and a partial pressure resistor (4) which selectively switches connections to the input resistors (2a, 2b) using the switching circuit (3).