| 摘要 |
PURPOSE:To enable to make variable the center frequency and the maximum delay amount taumax independently each other with the simplified constitution of the phase circuit having the transfer function of second order. CONSTITUTION:The input signal is fed to the adder 1, and the output of the adder 1 is fed to the adder 2 and also to the first voltage division circuit consisting of the impedance circuits 7, 8 and the second voltage division circuit consisting of the impedance circuits 9, 10. The divided output of the first voltage division circuit is branched into two and connected respectively to the amplifiers 3, 5, and that of the second circuit is branched into two and connected to the amplifiers 4, 6 respectively. The output of the amplifiers 3, 4 is fed to the adder 1 for feedback purpose and the output of the amplifiers 4, 6 is fed to the adder 2 for feed forward purpose. |
