公开(公告)号：CA1111519A

公开(公告)日：1981-10-27

申请号：CA277281

申请日：1977-04-29

Applicant: IBM

Inventor： HOWARD DONALD D ,  SCHETTLER HELMUT

IPC: H03K17/04 ,  H03K17/60 ,  H03K19/013 ,  H03K17/00 ,  H03F3/26

Abstract: A.C. POWERED SPEED UP CIRCUIT An improved speed up circuit, especially useful with high speed, push pull circuits, is disclosed. This uses only A.C. power to discharge the interelectrode and depletion capacitances of an output transistor thereby eliminating uncontrolled shunt current from the output to ground through the output transistor thereby allowing the output to reach the desired level in a shorter period of time. These desirable results are accomplished by capacitively coupling a resistor-transistor speed up circuit to the base of the output transistor to actively pull the base of the output transistor to ground and discharge the inherent interelectrode and depletion capacitances of the output transistor.

公开(公告)号：FR2352439A1

公开(公告)日：1977-12-16

申请号：FR7712635

申请日：1977-04-19

Applicant: IBM

Inventor： HOWARD DONALD D ,  SCHETTLE HELMUT

IPC: H03K17/04 ,  H03K17/60 ,  H03K19/013 ,  H03F3/343

Abstract: An improved speed up circuit, especially useful with high speed, push pull circuits, is disclosed. This uses only A.C. power to discharge the interelectrode and depletion capacitances of an output transistor thereby eliminating uncontrolled shunt current from the output to ground through the output transistor thereby allowing the output to reach the desired level in a shorter period of time. These desirable results are accomplished by capacitively coupling a resistor-transistor speed up circuit to the base of the output transistor to actively pull the base of the output transistor to ground and discharge the inherent interelectrode and depletion capacitances of the output transistor.