Patent attributes
A termination circuit that adjusts differences in the resistance values of wiring-layer resistance and transistor ON resistance so that a desired termination resistance value is obtained. A wiring-layer resistance 10 is connected between an input terminal 30, which connects to an input circuit 18, and a first node; a transistor group 12 is connected between the first node and ground; a wiring-layer resistance 11 is connected between the first node and a second node; and a transistor group 13 is connected between the second node and ground. Furthermore, a wiring-layer resistance 14 is connected between the input terminal 30 and a third node; a transistor group 16 is connected between the third node and power source VDD; a wiring-layer resistance 15 is connected between the third node and a fourth node, and a transistor group 17 is connected between a fourth node and power source VDD. The transistor groups 12, 13, 16, 17 comprise one or a plurality of transistors that are turned ON or OFF by respective control signals BN1 to BN4, BN5 to BN8, BP1 to BP4 and BP5 to BP8.
