Patent ID: 6885240

Claim:
An Amplifying circuit with variable load drivability, comprising: an amplifying means for amplifying input signals a first time through a first and a second transistors to generate first and second amplified signals and amplifying the first and second amplified signals a second time through a third and a fourth transistors to generate output signals; a detecting means for detecting the first and second amplified signals from said amplifying means to generate a first and a second detection signals; and a load drivability control means controlled by the first and second detection signals outputted from the detecting means for changing load drivability of the amplifying means, wherein the detecting means further includes: a Schmitt-trigger means for detecting voltage level change in the first and second amplified signals; an exclusive OR gate for receiving output signals from said Schmitt-trigger means to generate the first detection signal; and an inverter for inverting the first detection signal to generate the second detection signal.