| 摘要 |
A high speed linear differential amplifier (HSLDA) having automatic gain adjustment to maximize linearity regardless of manufacturing process, changes in temperature, or swing width change of the input signal. The HSLDA comprises a differential amplifier, and a control signal generator including a replica differential amplifier, a reference voltage generator, and a comparator. The comparator outputs a control signal that automatically adjusts the gain of the high speed linear differential amplifier and of the replica differential amplifier. The replica differential amplifier receives predetermined complementary voltages as input signals and outputs a replica output signal to the comparator. The reference voltage generator outputs a voltage to the comparator at which linearity of the output signal of the differential amplifier is maximized. The control signal equalizes the voltage level of the replica output signal and the reference voltage, and controls the gain of the differential amplifier.
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