Driving circuit of tristate type

Abstract

Abstract PURPOSE: To obtain three output terminals while keeping high speed operation, by constituting the circuit with CMOS circuit inputting external selection signal and delivering the input signal and by providing the logic circuit specifying the output with the external selection signal. CONSTITUTION: The circuit is constituted with the CMOS circuit 5 inputting external selection signal to the both input terminals of the bipolar transistor Tr8 of the output inverter circuit using the bipolar transistor as load and MOSFET as driver and of the MOSFET 9, and the CMOS circuit 6 delivering the input signal, and the logic circuits 53,54,63 and 64 which can specify the output are coupled with external selection signal. Thus, the output terminal can take tristate value while keeping high speed operation. COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Osamu Minato
• 👤 Toshiaki Masuhara
• 👤 Toshio Sasaki
• 👤 Seiji Kubo

Bibliographic Details