Symmetric layout for quad operational amplifier

Details Symmetric layout for quad operational amplifier Symmetric layout for quad operational amplifier

1986-04-07

1988-01-05

Millins, James B.

Amplifiers

With semiconductor amplifying device

Integrated circuits

307310, 330256, 357 28, H03F 304

Patent

active

047178906

ABSTRACT:
A quad operational amplifier integrated circuit is constructed such that each of the four cells forms a linear array. Devices which must be critically matched in each cell are symmetrically disposed with respect to the power devices of each cell about the same axis of symmetry. In this manner, critical devices will always reside on isothermal contours. To further enhance matching of critical devices, the axis of symmetry may be chosen to be colinear with stress axis of the semiconductor die in which the quad-operational amplifier implemented.

REFERENCES:
patent: 3714527 (1973-01-01), Schmidt

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