CONVERSION CIRCUIT AND COMMUNICATION DEVICE

A conversion circuit and a communication device. The conversion circuit comprises: a first power supply module (2), a second power supply module (3), a first conversion circuit (4), a first protection circuit (5), a third power supply module (6), a fourth power supply module (7), a second conversion circuit (8) and a second protection circuit (9), wherein the first conversion circuit (4) is connected to the first power supply module (2), the second power supply module (3) and the first protection circuit (5); and the second conversion circuit (8) is connected to the third power supply module (6), the fourth power supply module (7) and the second protection circuit (9). Thus, level communication between devices having different working voltages is realized by means of the conversion circuit, thereby improving the universality of the conversion circuit, reducing the cost, and also reducing interference between circuits; and the wiring is simplified when the conversion circuit is integrated on a PCB, thereby red