Patent ID: 8836315

Claim:
A reference signal generating circuit comprising: a first nonlinear element that generates a first reference voltage; a second nonlinear element that generates a second reference voltage; a current controlling circuit that controls a current flowing to the first nonlinear element and a current flowing to the second nonlinear element based on an output voltage of the current controlling circuit itself; and N temperature characteristic adjusting elements (N is an integer of 2 or larger) that individually adjust temperature characteristics of the output voltage of the current controlling circuit, each of the temperature characteristic adjusting elements comprising: a first variable resistance coupled in series to the second nonlinear element; a second variable resistance coupled in parallel to a series circuit comprised of the second nonlinear element and the first variable resistance; and a third variable resistance coupled in parallel to the first nonlinear element, wherein a resistance value at the first variable resistance is adjusted so that frequency characteristics of an oscillator with respect to temperature are evened out in an adjustable range of resistance values at the second variable resistance and the third variable resistance, an output current generated on the basis of the output voltage being supplied to the oscillator.