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Petr Kadanka

Robert L Vyne

A band-gap voltage reference (39) has a regulator portion (70) providing a substantially constant current of predetermined magnitude Ic and a band-gap reference portion (72) receiving Ic. The reference portion (72) has a first branch including a first transistor (52) of a first type serially coupled to a second transistor (55) of a second type, a second branch including a third transistor (53) of the first type serially coupled to a fourth transistor (56) of the second type, the first and second branches forming a current mirror (73) carrying a total current of about Ic/2, and a third branch (57) in parallel with the first and second branches and carrying a current of substantially Ic-Ic/2. Base current (65) in the first two branches is compensated by base current (64) of the third branch.

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Rosnov p. R., 75661, Czechoslovakia

Petr Kadanka