| 摘要 |
PURPOSE:To reduce voltage noise without saturating an input transistor (TR) by using a rectifier element provided with a voltage clamp capability to an input signal voltage. CONSTITUTION:A collector potential change Vc of a drive current specifying TRQs when a signal at an input signal application terminal IN is changed largely from a low level to a high level selects a value of a voltage between the anode and cathode of a clamp diode Dc and a terminal voltage V7 approximately in a range possible for normal logical operation and sets it to be minimized. It is possible to keep a high speed logical operation without saturating an input TRQ1 to a large input amplitude and a voltage noise at a constant voltage application terminal 6 induced through a junction capacitance between the collector and base of the TRQs is reduced remarkably. |
