§13-8NIC( Negative-impedance converter(负阻抗变换器)) NC 十 R or i E R
1 =2 1 1 2 2 or R i = R i 2 i 1 i − + 1 − + 2 NIC 2 2 i 1 i − + 1 + + 1 i R1 R2 2 i − + §13-8 NIC (Negative-impedance converter（负阻抗变换器）)
Example: NIC U2=-R1i2 十 十 D R U1=U2(1) R4 (2) R RR i R U/i1-- input resistance The application of NIc R R 2 Telephone wires ,R=O NIC ∑
2 2 R i = − L (1) 1 =2 (2) 1 1 2 2 R i = R i 2 2 2 2 2 2 2 1 1 1 R R R i R i R i R i L L = − − = = 2 1 1 1 R R R i L = − 1 / i 1 − − input resistance Example: The application of NIC R − R NIC R = 0 Telephone wires 1 2 2 i 1 i − + 1 − + 2 RL NIC