公开(公告)号：JPH10294632A

公开(公告)日：1998-11-04

申请号：JP1163798

申请日：1998-01-23

Applicant: ST MICROELECTRON INC

Inventor： NOTARO JOSEPH ,  EDWARDS WILLIAM E

IPC: H03H7/01 ,  H03K5/01 ,  H03K5/06 ,  H03K5/12

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for shaping the digital waveform of integrated circuit process having no area efficient dielectric capacitor. SOLUTION: The dielectric capacitor is replaced with a 1st linearizing diode D1 and a 2nd diode D2 of waveform shaping circuit, and the respective diodes D1 and D2 have junction capacitances to be changed together with voltages applied cross the diodes D1 and D2. A constant current from a constant current source is supplied to the 1st linearizing diode. A current in inverse proportion to the joint capacitance of 1st linearizing diode D1 is generated at a node formed as the connecting part of the constant current source and the 1st linearizing diode D1. The current at this node is supplied to the 2nd diode D2, and the temporally linearized output voltage of waveform shaping circuit is generated.

公开(公告)号：JPH10283043A

公开(公告)日：1998-10-23

申请号：JP4913398

申请日：1998-03-02

Applicant: ST MICROELECTRON INC

Inventor： EDWARDS WILLIAM E

IPC: G05F3/26 ,  G05F1/56 ,  G05F1/565 ,  G05F1/575 ,  H03F3/343

Abstract: PROBLEM TO BE SOLVED: To provide high stability without increasing power dissipation by changing the zero of a voltage adjuster and offsetting a changing load pole by an FET transistor when output power supply withdrawn by a load is made to fluctuate by load conditions. SOLUTION: A variable impedance device 7 changes the zero of the voltage adjuster 3 by a corresponding form and offsets the changing load pole. For instance, in the case that a current withdrawn by the load increases, a pole frequency increases as well and the voltage adjuster 3 becomes instable. An increased load current makes it possible to reduce the output voltage by an amplifier 6 and pass though more currents through a path transistor 8. The variable impedance device 7 for receiving a reduced voltage through an input terminal 9 reduces a resistance value. The reduced resistance value of the variable impedance 7 increases the zero of the voltage adjuster 3 and offsets the increasing load pole frequency.