| 摘要 |
<p>A split-path linear isolation circuit apparatus includes a transformer (26), a photoelectric isolation amplifier (102) and a signal combiner (105), and also includes a frequency divider of subtraction type and a time constant adjusting circuit (103). The frequency divider of subtraction type consists of a low-pass filter (100) or a high-pass filter and a subtractor (101), and an input signal is connected together with the input of the low-pass filter (100) or the high-pass filter and one input of the subtractor (101), and the output of the low-pass filter (100) or the high-pass filter is connected with the other input of the subtractor (101). The time constant adjusting circuit (103) is formed of an adjustable resistance (31) and a capacitor (32) connected, and the circuit may adjust the time constant of the photoelectric isolation circuit for compensating for the depressed amplitude-frequency response at the overlapping frequency which is caused by the delay time of the photoelectric isolation circuit longer than that of the transformer.</p> |
