Method and circuit for trimming a current source in a package

Details Method and circuit for trimming a current source in a package Method and circuit for trimming a current source in a package

2006-11-21

2006-11-21

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S252000

Reexamination Certificate

active

07138868

ABSTRACT:
A method and circuit for trimming a current source packaged with a device can facilitate trimming of the current source without the need for additional pins or dual function pins, resulting in improved accuracy and/or simplified trimming techniques. An exemplary packaged device is configured with a trimming circuit comprising a current trimming network and a coupling circuit. An exemplary packaged device can comprise any op amp, current or voltage reference, and/or sensor device, and is configured with one or more monitor inputs. An exemplary current trimming network comprises a variable current source and a reference current source, wherein a magnitude of the variable current source can be compared to the magnitude of the reference current source. An exemplary coupling circuit is coupled between the current trimming network and the device and is configured for enabling and disabling connection of an output of the current trimming network and a monitor input of the device. During an exemplary trimming method, the variable current source is configured with a magnitude adjusted to a desired proportion of a magnitude of the reference current source, with the current trimming network configured to produce a current proportional to the difference, sum, or product of the first and second current sources.

REFERENCES:
patent: 5506541 (1996-04-01), Herndon
patent: 6445245 (2002-09-01), Schultz et al.
patent: 6583740 (2003-06-01), Schofield et al.
patent: 6614305 (2003-09-01), Ivanov et al.
patent: 6628169 (2003-09-01), Ivanov et al.

Affiliated with

Also associated with

Rating

Method and circuit for trimming a current source in a package does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and circuit for trimming a current source in a package, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and circuit for trimming a current source in a package will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3685963