Proportional settling time adjustment for diode voltage and...

Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C327S512000, C702S130000

Reexamination Certificate

active

07429129

ABSTRACT:
A temperature sensor circuit and system providing accurate digital temperature readings using a local or remote temperature diode. In one set of embodiments a change in diode junction voltage (ΔVBE) proportional to the temperature of the diode is captured and provided to an analog to digital converter (ADC), which may perform required signal conditioning functions on ΔVBE, and provide a digital output corresponding to the temperature of the diode. DC components of errors in the measured temperature that may result from EMI noise modulating the junction voltage (VBE) may be minimized through the use of a front-end sample-and-hold circuit coupled between the diode and the ADC, in combination with a shunt capacitor coupled across the diode junction. The sample-and-hold-circuit may sample VBEat a frequency that provides sufficient settling time for each VBEsample, and provide corresponding stable ΔVBEsamples to the ADC at the ADC operating frequency. The ADC may therefore be operated at its preferred sampling frequency rate without incurring reading errors while still averaging out AC components of additional errors induced by sources other than EMI.

REFERENCES:
patent: 3672215 (1972-06-01), Stout et al.
patent: 3679992 (1972-07-01), Yerman
patent: 4061033 (1977-12-01), Nixon
patent: 4228684 (1980-10-01), Templin
patent: 4298947 (1981-11-01), Tamura et al.
patent: 4537518 (1985-08-01), Murase
patent: 4565456 (1986-01-01), Iida et al.
patent: 4636092 (1987-01-01), Hegyi
patent: 5195827 (1993-03-01), Audy et al.
patent: 5226733 (1993-07-01), Mitchell et al.
patent: 5419637 (1995-05-01), Frye et al.
patent: 5982221 (1999-11-01), Tuthill
patent: 6008685 (1999-12-01), Kunst
patent: 6097239 (2000-08-01), Miranda et al.
patent: 6169442 (2001-01-01), Meehan et al.
patent: 6554469 (2003-04-01), Thomson et al.
patent: 6554470 (2003-04-01), Zhang et al.
patent: 6636934 (2003-10-01), Linnell et al.
patent: 6637934 (2003-10-01), Henderson et al.
patent: 6736540 (2004-05-01), Sheehan et al.
patent: 6847319 (2005-01-01), Stockstad
patent: 7010440 (2006-03-01), Lillis et al.
patent: 2004/0131104 (2004-07-01), Seferian
patent: 2006/0265174 (2006-11-01), Doyle et al.
patent: 2008/0032655 (2008-02-01), Kawasaki et al.
patent: 2008/0065345 (2008-03-01), Ooghe
patent: 003637520 (1986-11-01), None
patent: 000498799 (1991-05-01), None
patent: 000741860 (1998-12-01), None
patent: 002292221 (1996-02-01), None
U.S. Appl. No. 10/924,176, filed Aug. 23, 2004, McLeod.
U.S. Appl. No. 10/979,437, filed Nov. 2, 2004, McLeod.
Shen-Whan Chen; Trung Duong; Min-Yih Luo, “Channel Temperature Measurement Using Pulse-Gate Method,” Microwave Theory and Techniques, IEEE Transactions on , vol. 47 ,Issue: 3, Mar. 1999, pp. 362-365.
Kaliyugavaradan, S.; Sankaran, P.; Murti, “Application Of Reciprocal Time Generation Technique To Digital Temperature Measurement,” V.G.K.;Instrumentation and Measurement, IEEE Transactions on , vol. 43 , Issue: 1, Feb. 1994 pp. 99-100.
Cao Hui; Huang Junnai; “Circuit Design And Implementation For Digital Temperature And Humidity Measurement And Control,” ASIC, 2001. Proceedings. 4th International Conference on Oct. 23-25, 2001 pp. 502-505.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Proportional settling time adjustment for diode voltage and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Proportional settling time adjustment for diode voltage and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proportional settling time adjustment for diode voltage and... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3986002

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.