公开(公告)号：JPH0553406B2

公开(公告)日：1993-08-10

申请号：JP12610887

申请日：1987-05-25

Applicant: IBM

Inventor： ASHTON GERARD JOHN ,  CAVALIERE JOSEPH RICHARD ,  CHENG MING TOCK

IPC: H03K19/013 ,  H03K19/086 ,  H03K19/0952

公开(公告)号：JPS6363222A

公开(公告)日：1988-03-19

申请号：JP12610887

申请日：1987-05-25

Applicant: IBM

Inventor： ASHTON GERARD JOHN ,  CAVALIERE JOSEPH RICHARD ,  CHENG MING TOCK

IPC: H03K19/013 ,  H03K19/086 ,  H03K19/0952

公开(公告)号：DE3774372D1

公开(公告)日：1991-12-12

申请号：DE3774372

申请日：1987-07-28

Applicant: IBM

Inventor： ASHTON GERARD JOHN ,  CAVALIERE JOSEPH RICHARD ,  CHENG MING TOCK

IPC: H03K19/013 ,  H03K19/086 ,  H03K19/0952

Abstract: A logic circuit network with circuitry for independently controlling at least one of the logic levels generated thereby, comprising, in one embodiment, a logic circuit with an output current node, a complement output current node, and at least one input line, the circuit for generating an output voltage level at the output current node which depends on the amount of current drawn therethrough, and for generating a complement output voltage level at the complement output current node which depends on the amount of current drawn therethrough; in combination with a current drawing means for drawing a controlled amount of current through one of those nodes to adjust the voltage level at that node. In one embodiment, this current drawing means is connected to a voltage reference level VR1, and operates to draw an amount of current from whichever current node is at a voltage level which is closest to a predetermined constant plus this voltage reference level VR1. The amount of current drawn is controlled to cause this closest node voltage level to approach this predetermined constant plus VR1. In a preferred embodiment this current drawing means comprises a separate differential amplifier connected to each of the output current nodes.