Temperature set point circuit and method employing adjustment re

Details Temperature set point circuit and method employing adjustment re Temperature set point circuit and method employing adjustment re

1997-02-07

1998-10-13

Sterrett, Jeffrey L.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323315, 323907, G05F 308

Patent

active

058217410

ABSTRACT:
A temperature set point circuit employs a pair of bipolar transistors operated at unequal current densities, with the difference between the transistors' base-emitter voltages appearing across a trim resistor connecting their emitters. A pair of trim resistors, one of which may be external to an integrated circuit embodiment of the set point circuit, forms a resistor divider with the inter-base resistor and are selected to produce a desired temperature trip-point.

REFERENCES:
patent: 4313083 (1982-01-01), Gilbert et al.
patent: 4362984 (1982-12-01), Holland
patent: 4475103 (1984-10-01), Brokaw et al.
patent: 4864162 (1989-09-01), Maoz
patent: 5394078 (1995-02-01), Brokaw
patent: 5519308 (1996-05-01), Gilbert
patent: 5563504 (1996-10-01), Gilbert et al.
patent: 5672961 (1997-09-01), Entrikin et al.

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