Patent ID: 6052018
Filing Date: 2000-04-18
Classification: H03K

Abstract:
A small amplitude signal output circuit comprising:a first output section for receiving a first logic signal to output a first output signal having a first output voltage through a first output terminal;a first level sense circuit for producing a first level signal based on the first output voltage such that, as the first output voltage changes, the first level signal changes by a corresponding amount; anda first level control circuit for varying the first output voltage based on the change in the first level signal,wherein said first output section comprises a pair of first and second transistors connected in series, drain regions of said transistors being connected to said first output terminal and to a terminal voltage source through a resistor and said first output terminal,wherein said first level sense circuit comprises a third transistor having a gate connected to said first output terminal and a fourth transistor connected in series with said third transistor, andwherein said first level control circuit comprises a resistor element connected in series with said third and fourth transistors, and a fifth transistor having an emitter connected to a source of said first transistor and a base connected to a drain of said third transistor.