Patent attributes
A reference voltage generating circuit includes a resistance dividing circuit formed with resistors connected in series. This circuit includes: a first power supply circuit that is formed with field effect transistors, and outputs voltage having a negative temperature coefficient with respect to a change in environmental temperature; a source follower circuit that includes a first field effect transistor connected to the gate of the first power supply circuit, and the resistance dividing circuit formed with the resistors that are connected in series between the drain and ground of the first field effect transistor and between the source of the first field effect transistor and power supply voltage, and adjusts the deviation in the negative temperature coefficient of the voltage that is output from the first power supply circuit; and a second power supply circuit that is connected to the source follower circuit, is formed with field effect transistors, generates voltage having a positive temperature coefficient with respect to a change in environmental temperature, and outputs voltage having the deviation in temperature coefficient compensated for.
