United States Patent 3,518,510
June 30, 1970

Planar Transistor With Substrate-Base Connection Providing Automatic Gain Control
Jack Stewart Lamming

Filed April 1, 1968
Image of US PATENT 3,518,510

Abstract of the Disclosure

A A.G.C circuit having a transistor wherein a large portion of the base region, or a region shorted to the base region, encompasses the collector region.
Figure descriptions: cover graphic

  • Figure 1 is a plan view of a semiconductor body haing an n-p-n silicon planar transistor therein, at a stage of manufacture prior to attachment of connecting leads to various regions of the body and encapsulation in an envelope.
  • Figures 2A and 2B are vertical sections through the semiconductor body along the chain dot section lines AA' and BB' respectively of Figure 1.

 Citations [54]:
3,309,537 03/1967 Archer 3,319,174 05/1967 Hellstrom 3,372,070 03/1968 Zuk 3,418,545 12/1968 Hutson
National Museum of American History
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