| 摘要 |
A temperature set point circuit employs a pair of bipolar transistors (Q6, Q9) operated at unequal current densities, with the difference between the transistors' base-emitter voltages appearing across a trim resistor (R6) connecting their emitters. A pair of trim resistors (R3, RA) one of which may be external to an integrated circuit embodiment of the set point circuit, form a resistor divider with the inter-base resistor and are selected to produce a desired temperature trip-point.
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