| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit device, equipped with an input circuit by which the amplitude of an output signal, is stabilized even at a low voltage. SOLUTION: This device is provided with a resistance means for forming an operating current in the differential form of a first transistor, through which an input signal is supplied to a control input terminal, and a second transistor through which a reference voltage is supplied to a control input terminal, and a variable resistance means through which the voltage of the output node of the first or second transistor is supplied to a control terminal and which is connected serially to the resistance means. Then, the resistance of the variable resistance means at the time of turning on the first transistor is set relatively large, in comparison with the resistance of the variable resistor means at the time of turning on the second transistor, and change of the current to flow to the resistance means is reduced in comparison to change of the input signal. Thus, an output signal amplitude and a DC level are made almost equal to the change of the input signal.
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