Circuit for compensating for variations in both temperature and

Details Circuit for compensating for variations in both temperature and Circuit for compensating for variations in both temperature and

1998-03-16

1999-11-30

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Compensation for variations in external physical values

327362, 327538, 327513, 330289, H03K 1714

Patent

active

059949457

ABSTRACT:
A compensation circuit which accounts for variations in both temperature and V.sub.CC supply voltage on an integrated circuit. The compensation circuit includes four quasi-independent compensation current sources, each of which generates a corresponding compensation current. The first compensation current source generates a first compensation current which has a positive slope with respect to temperature. The second compensation current source generates a second compensation current which has a negative slope with respect to temperature. The third compensation current source generates a third compensation current which has a negative slope with respect to the V.sub.CC supply voltage. The fourth compensation current source generates a fourth compensation current which has a positive slope with respect to the V.sub.CC supply voltage. The first, second, third and fourth compensation currents are summed to create a total compensation current. The compensation current sources are designed to provide different, pre-determined total compensation currents for different temperatures and supply voltages. The predetermined total compensation currents are selected to cause the compensated circuit to transfer signals at a constant speed, regardless of temperature and supply voltage.

REFERENCES:
patent: 5631600 (1997-05-01), Akioka et al.

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