Comparing circuit and offset compensating apparatus

Details Comparing circuit and offset compensating apparatus Comparing circuit and offset compensating apparatus

2006-07-25

2006-07-25

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C330S009000, C330S053000

Reexamination Certificate

active

07081785

ABSTRACT:
While a switch SW4is connected to “a”-terminal side, offset of a differential output voltage “A−” of a D/A converter500a(500b) is held in a comparator400, and is reflected to a reference voltage. Thereafter, the switch SW4is switched to a “b”-terminal side, and offset of a differential output voltage “A+” of the D/A converter500a(500b) is measured by the comparator400. An error signal is outputted to a counter412so as to count up the counter412. Such an operation is repeatedly carried out in which the count value is added to 1.7 V and then the added count value is inputted into the D/A converter500a(500b), and such a count value latched in a latch at timing when the error signal is inverted is defined as an offset correction value.

REFERENCES:
patent: 3988689 (1976-10-01), Ochi et al.
patent: 4229703 (1980-10-01), Bustin
patent: 4356450 (1982-10-01), Masuda
patent: 5793230 (1998-08-01), Chu et al.
patent: 6426663 (2002-07-01), Manlove et al.
patent: 6894568 (2005-05-01), Seetharaman et al.
patent: 2001/0048344 (2001-12-01), Isken et al.
patent: 2002/0130696 (2002-09-01), Yoshizawa
patent: 2003/0006920 (2003-01-01), Mori
patent: 7-202693 (1995-08-01), None
patent: 10-145194 (1998-05-01), None
patent: 11-68476 (1999-03-01), None
patent: 2002-237742 (2002-08-01), None

Affiliated with

Also associated with

Rating

Comparing circuit and offset compensating apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Comparing circuit and offset compensating apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparing circuit and offset compensating apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3595357