United States Patent 3,544,860
December 1, 1970

Integrated Power Output Circuit
Abraham Lichowsky

Filed April 11, 1968
Image of US PATENT 3,544,860

Abstract of the Disclosure

An integrated power output circuit includes several transistors connected as darlington pairs. The transistors are arranged in adjacent parallel rows, with one transistor of each pair in each of the rows. The several pairs are connected in parallel with a single metallization layer which requires no lead crossings. Series base resistance is provided, in the input to each pair and is utilized to aid in equalizing the current flow among all the pairs.
Figure descriptions: cover graphic

  • Figure 1 is a schematic circuit diagram of the present power output circuit.
  • Figure 2 is a plan view of this circuit in monolithic integrated form.

 Citations [54]:
2,985,804 05/1961 Buie 3,264,493 08/1966 Price 3,416,043 12/1968 Jorgensen 3,442,003 05/1969 Weir
National Museum of American History
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