公开(公告)号：AU3786193A

公开(公告)日：1993-09-13

申请号：AU3786193

申请日：1993-02-23

Applicant: MICROUNITY SYSTEMS ENGINEERING INC

Inventor： ROSSEEL GEERT ,  HERNDON WILLIAM H ,  MATTHEWS JAMES A

IPC: H03K19/003 ,  H03K17/14 ,  H03K17/567 ,  H03K17/60 ,  H03K19/08 ,  H03K19/086 ,  H03K19/0944 ,  H03K17/16

Abstract: An improved BiCMOS logic circuit utilizes an emitter-coupled pair of bipolar transistors for differentially comparing an input signal with a logic reference level. Each of the bipolar transistors are resistively loaded by a network of p-channel metal-oxide-semiconductor (PMOS) transistors coupled in parallel. At least one of the parallel combination of transistors has its gate coupled to a control signal providing a variable load resistance. The control signal is preferably provided by a feedback network which maintains a constant voltage swing across the network over temperature.