Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1995-03-28
1997-08-26
Cummings, Scott
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
374163, 327513, G01K 700
Patent
active
056604742
ABSTRACT:
A temperature detecting circuit generates an output signal depending on temperature and unaffected by variations of power supply voltage. The temperature detecting circuit provides a diode which generates a voltage across two terminals depending on the temperature, a first resistor connected to the anode of this diode, a second resistor whereof one end is earthed, first and second transistors for applying a fixed voltage to the first and second resistors, third and fourth transistors supplied by the current flowing through the first and second resistors, fifth and sixth transistors to the bases of which the emitter currents of the third and fourth transistors are applied, and seventh and eighth transistors to the bases of which the emitter currents of the fifth and sixth transistors are applied. The output current from the output terminal 20 varies according to the temperature, but does not vary with the power supply voltage.
REFERENCES:
patent: 3092998 (1963-06-01), Barton
patent: 4047435 (1977-09-01), Keith
patent: 4184126 (1980-01-01), Jaskolski et al.
patent: 4914317 (1990-04-01), Agiman
patent: 4931665 (1990-06-01), Yee
patent: 5094546 (1992-03-01), Tsuji
patent: 5213416 (1993-05-01), Neely et al.
patent: 5488296 (1996-01-01), Hancock
European Search Report, dated Jul. 5, 1995, Appl. No. 95302041.9.
G.C.M. Meijer, et al., "A Three-terminal Integrated Temperature Transducer with Microcomputer Interfacing", Sensors and Actuators, 18 (1989 Jun. 15, No. 2, Lanusanne, CH.
Masanori Nishiguche, "Precision Comparison of Surface Temperature measurements Techniques for GaAs IC's", IEEE Transactions on Components, Hybrids, and Manufacturing Technology, 16 (1993) Aug., No. 5, New York, US .
Cummings Scott
Sanyo Electric Co,. Ltd.
LandOfFree
Temperature detecting circuit generating an output signal accord does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature detecting circuit generating an output signal accord, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature detecting circuit generating an output signal accord will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1983970