| 摘要 |
Constant-absorption circuit for the bidirectional transfer of an alternating signal, which comprises a resistor (1) having a first terminal (2) which is connected to a first input of a differential amplifier (3) and to an output of a first current mirror (4). The resistor (1) has a second terminal (5) connected to a capacitor (6), said capacitor (6) being further connected to a second input of the differential amplifier (3). The resistor (1) is connected, by means of its second terminal (5), to the output of a second current mirror (7). The differential amplifier (3) has a first output connected to an input terminal of the second current mirror (7) and has a second output connected to an input terminal of the first current mirror (4). The differential amplifier (3), in cooperation with the first and second current mirrors (4,7), transfers an alternating signal from the first terminal (2) to the second terminal (5) of the resistor (1) and vice versa without attenuation. <IMAGE>
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