| 摘要 |
A current-controlled FET resistor and a low supply, current-controlled FET Pi attenuator network are provided. The current-controlled FET resistor includes an FET having drain, source, and gate terminals, and a connection between the gate terminal and the drain terminal, wherein a resistance characteristic of the FET is proportional to an input current flowing into the drain terminal. The low supply, current-controlled FET Pi attenuator network includes a first current-controlled FET resistor connected between an input node and a ground node, a second current-controlled FET resistor connected between the input node and an output node, a third current-controlled FET resistor connected between the output node and the ground node, a DC return path connected in parallel between the output node and the ground node, a first DC blocking capacitor connected between a Pi attenuator network input and the input node, a second DC blocking capacitor connected between the input node and the first current-controlled FET resistor, and a third DC blocking capacitor connected between the output node and the third current-controlled FET resistor, wherein resistance characteristics of the current-controlled FET resistors vary in relation to input currents flowing into the drain terminals.
|
