Input circuit

Abstract

Abstract PURPOSE:To reduce the number of components by employing an inverter composed of a bipolar transistor(TR) and a MOS TR for an input initial stage. CONSTITUTION:A bipolar TR Q11 is provided in place of an N-channel TR for the inverter of the initial stage of an input circuit in a conventional circuit. That is, P-channel TR P11 whose gate receives an input signal A1 is connected between a power (VCC) terminal and a node N1, and the bipolar TR Q11 is provided, whose collector is connected to the node N1 and whose emitter is connected to a ground(GND) terminal. Moreover, the node N1 is connected to a terminal outputting a noninverting output signal A1' via an inverter composed of TRs P12, N12. Thus, a desired driving capability is realized by using comparatively small bipolar TRs.

Inventors

• 👤 Zensuke Matsuda
• 👤 松田　善介

Bibliographic Details