| 摘要 |
A receiver is configured as a multistage differential amplifier. A front differential transconductance amplifier provides complementary outputs which respectively control current sources for an intermediate differential amplifier and a final differential amplifier. The output of the intermediate differential amplifier controls the mirror-current load of the final differential amplifier. The final current source and the final mirror-current load are controlled so that they induce a push-pull effect on the current output. When a high output is required, the output current is increased to charge the output capacitance more quickly. When a low output is required, the augmented current source drains the output capacitance more quickly. The net result is an enhanced slew rate for the receiver. The receiver can thus operate at higher frequencies and handle greater information rates.
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