| 摘要 |
PURPOSE:To improve remarkably the integration degree at IC patterning by using a multi-emitter phase splitter transistor (TR) and a diode connected between the collector and emitter. CONSTITUTION:When an H level is inputted to an input IN, the level of an output terminal (a) of the input circuit goes to logical H and a TR Q11 is turned on. When a terminal TS.IN is logical H, since an input current flows to a pull-down input (c), the pull-down circuit is turned on and the output goes to logical L. In this case, since no input current flows to the pull-up input (b), the pull-up circuit is turned off. when a tri-state input with logical L is fed, a current flows to the TS.IN via the 2nd emitter and the input current of the terminal (c) is lost, the pull-down circuit is turned off. In applying IC pattern, since a diode D11 is provided in the same isolation land as the TR Q11, the degree of circuit integration is improved remarkably.
|
