| 摘要 |
PURPOSE:To obtain the frequency characteristics adjusting circuit having the transfer function of the second order type, by the constitution of two sets of adders, feedback circuit, feedforward circuit, two variable resistors and capacitor. CONSTITUTION:The input terminal 5 is connected to the adder 1, the output of the adder 1 is branched into two, one is connected to the input terminal of the adder 2 and another is grounded with the series connection circuit of the series circuit consisting of the variable resistor 7 and capacitor 8 and the parallel circuit consisting of the variable resistor 9 and capacitor 10. The junction 11 of the series connection circuit is branched into two;one is connected to another input terminal of the adder 1 via the feedback circuit 3, and another is connected to another input terminal of the adder 2 via the feed forward circuit 4. Further, the output of the adder 2 is connected to the output terminal 6. With this constitution, the amplification factor of the circuits 3 and 4 is respectively set to a given value and the resistance value of the variable resistors 7, 9 and the capacitance of the capacitors 8, 10 are determined to a given relation, allowing to adjust the frequency characteristics having the transfer function of the second order. |
