发明名称 BICMOS tri-state output buffer.
摘要 <p>A BiCMOS tri-state output buffer including logic for preventing reverse biasing of the output transistors. A pair of bipolar transistors (12, 14) are configured as a totem-pole output circuit. A transmission gate (38) provides a controllable-resistance current path between the base and emitter of the emitter-follower transistor (12). Logic circuitry (26, 54, 44, 46) causes the resistance of the path to go low when the circuit is in its disabled or high-impedance "off" state and when the output undergoes a high-to-low transition when the circuit is not disabled, thereby preventing reverse bias of the emitter-follower output transistor. &lt;IMAGE&gt;</p>
申请公布号 EP0490243(A1) 申请公布日期 1992.06.17
申请号 EP19910120784 申请日期 1991.12.03
申请人 HEWLETT-PACKARD COMPANY 发明人 JOLY, ROBERT
分类号 H03K17/081;H03K17/567;H03K19/003;H03K19/0175;H03K19/082;H03K19/0944 主分类号 H03K17/081
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