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On-chip substrate voltage generator
T954006 On-chip substrate voltage generator
Patent Drawings:Drawing: T954006-2    Drawing: T954006-3    
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(2 images)

Inventor: Lee, et al.
Date Issued: January 4, 1977
Application: 05/672,898
Filed: April 2, 1976
Inventors: Lee; James M. (Wappingers Falls, NY)
Sonoda; George (Poughkeepsie, NY)
Assignee: International Business Machines (Armonk, NY)
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 257/368; 327/581; 331/57
Field Of Search:
International Class:
U.S Patent Documents:
Foreign Patent Documents:
Other References:

Abstract: disclosed is an apparatus for generating and controlling a desired substrate potential level or a semiconductor chip. A pulse source, such as an oscillator, provides a pulse train which, in combination with a control signal from the substrate voltage detector, selectively discharges a capacitor in a voltage level converter for obtaining a desired level of substrate potential. A feedback path through the substrate regulates the conductivity of a reference transistor in the substrate voltage detector providing the required control signal.
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