Patent ID: 6870421

Claim:
A temperature characteristic compensation apparatus that offsets or adjusts temperature characteristics of main parts of an electronic apparatus, the temperature characteristic compensation apparatus comprising: a constant voltage source that outputs a reference voltage that is generated based on a constant voltage obtained by a band-gap circuit; a voltage follower circuit that stably supplies the reference voltage output from the constant voltage source with a low impedance; and a temperature gradient managing device that flexibly manages a temperature coefficient of the reference voltage, the constant voltage source having: a constant current circuit including a plurality of constant current paths that include a first current path having a first resistance being interposed therein, and the band gap circuit formed from a pair of transistors in a current mirror configuration that are interposed in the plurality of constant current paths, respectively; and a second constant current path that is connected in cascade to the constant current circuit, formed in a multiple-current mirror configuration and has a second resistance interposed therein, the temperature gradient managing device that flexibly selects a ratio of the second resistance with respect to the first resistance based on a predetermined formula relating to a size ratio of the pair of transistors, and a one-shot trigger circuit that provides a shock voltage to bases of the transistors, which is required to turn ON the transistors to turn the band gap circuit from OFF to ON.