INPUT BUFFER, IN WHICH AN INVERTER FOR A DELAY IS UNNECESSARY

摘要

PURPOSE: An input buffer is provided to control the delay of the output signal by controlling the power voltage applied to the buffer and the current due to the ground voltage, so the inverter used for the delay is unnecessary. CONSTITUTION: An input buffer includes a first level adjustment unit(311), a second level adjustment unit(312), a variable buffer(320) and a synchronization output terminal(330). The first level adjustment unit(311) applies the first control voltage having a plurality of levels. The second level adjustment unit(312) applies the second control voltage having a plurality of levels. The variable buffer(320) controls the amount of operational current by the first control voltage and controls the amount of operational current in response to the ground voltage by the second control voltage. The variable buffer(320) obtains the differential component of the reference voltage and the input voltage and outputs the buffer output signal having a logic step according to the code of the differential component. And, the synchronization output terminal(330) outputs by receiving the output signal of the variable buffer(320) and being synchronized.