Dynamic, digitally controlled, temperature compensated...

Details Dynamic, digitally controlled, temperature compensated... Dynamic, digitally controlled, temperature compensated...

2005-04-26

2005-04-26

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S256000, C323S313000

Reexamination Certificate

active

06885243

ABSTRACT:
A voltage reference is dynamically and digitally controlled by a digital function. The digital function may be implemented as a digital calculation or look up table. Inputs to the function include a modifiable trim value stored in a trim register, and a substrate temperature value. The preset value of the trim register is a trim preset value generated by cutting fuses and/or leaving fuses uncut. The cutting may be performed using laser trimming-devices. The output of the digital function is a corrected reference trim value that controls the gain of a voltage reference amplifier whose input is a band gap based voltage reference, and whose output is a derived voltage reference. The substrate temperature value is provided by a monolithic temperature monitor whose sensor may be on the same die as the derived voltage reference. The derived voltage reference provides a stable reference voltage that is dynamically and digitally controllable, to a host system that requires a voltage reference.

REFERENCES:
patent: 5079516 (1992-01-01), Russell et al.
patent: 5935466 (1999-08-01), Knudsen
patent: 6118384 (2000-09-01), Sheldon et al.
patent: 6292050 (2001-09-01), Dooley et al.
patent: 6486646 (2002-11-01), Kang
patent: 6515464 (2003-02-01), Darmawaskita et al.
patent: 20030155975 (2003-08-01), Ivanov et al.

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