Integrated circuit two terminal temperature transducer

Details Integrated circuit two terminal temperature transducer Integrated circuit two terminal temperature transducer

1976-07-06

1978-10-31

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

307299B, 323 19, 323 68, 357 44, 357 51, 330289, G05F 158, H01L 1900

Patent

active

041236980

ABSTRACT:
An integrated circuit two terminal temperature transducer providing an accurate current output that is linearly related to absolute temperature over an extended temperature range. The circuit is of the type using first and second transistors having conductive areas of different sizes, and control transistors for supplying equal currents through the first and second transistors to operate them at different current densities, and a resistor responsive to the base-to-emitter voltages of the first and second transistors for developing currents therethrough proportional to absolute temperature. Improved accuracy over an extended temperature range is provided in a two terminal device by means of a third transistor coupled to the first and second transistors to generate another controlled current varying linearly with absolute temperature to be combined with the currents through the first and second transistors to form an output current. Bias currents used by control transistors are directed through the third transistor to compel the bias currents to become components of the controlled current. Similarly, the integrated circuit substrate is connected to direct the substrate leakage current through the third transistor to compel the leakage current to become a component of the output current. Accordingly, bias current and substrate leakage current do not erroneously affect the output current.

REFERENCES:
patent: 3624423 (1971-11-01), Borgini
patent: 3624454 (1971-11-01), Adkinson et al.
patent: 3846696 (1974-11-01), Ahmed
patent: 3886435 (1975-05-01), Steckler
patent: 3911353 (1975-10-01), VAN DE Plassche
patent: 3914683 (1975-10-01), VAN DE Plassche
patent: 3982172 (1976-09-01), VAN DE Plassche
patent: 4028564 (1977-06-01), Streit et al.

Affiliated with

Also associated with

Rating

Integrated circuit two terminal temperature transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Integrated circuit two terminal temperature transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated circuit two terminal temperature transducer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1836956