초록 ▼

A voltage generator includes first to fourth current sources, first to fourth MOS transistors and a resistor. The first and second current sources created constant currents which are independent of a temperature change, and the third and fourth current sources create currents which vary in proportio

A voltage generator includes first to fourth current sources, first to fourth MOS transistors and a resistor. The first and second current sources created constant currents which are independent of a temperature change, and the third and fourth current sources create currents which vary in proportion to a temperature change. The resistor acts as a current/voltage converter for converting a current into a voltage. The first current source and the current path of the first MOS transistor are serially connected between a power supply and an output terminal. The second current source and the current path of the second MOS transistor are serially connected between the output terminal and a ground node. The third current source and the current path of the third MOS transistor are serially connected between the power supply and the output terminal. The fourth current source and the current path of the fourth MOS transistor are serially connected between the output terminal and the ground node. The gates of the first to fourth MOS transistors are supplied with first to fourth enable signals. The first to fourth MOS transistors are controlled so as to be selectively set into ON/OFF states by the first to fourth enable signals and the temperature characteristic is variously adjusted both in the positive and negative directions.

대표청구항 ▼

1. A voltage generator comprising:a first terminal acting as an output terminal; a constant current source connected to said first terminal, for supplying or discharging a constant current which is substantially independent of a temperature change to or from said first terminal; a temperature-depend

1. A voltage generator comprising:a first terminal acting as an output terminal; a constant current source connected to said first terminal, for supplying or discharging a constant current which is substantially independent of a temperature change to or from said first terminal; a temperature-dependent current source connected to said first terminal, for supplying or discharging a temperature-dependent current which changes as temperature varies to or from said first terminal; a first current/voltage converter connected to said first terminal; a constant current generating circuit connected to said first terminal and including a second current/voltage converter connected between second and third terminals, and a first control circuit for controlling a voltage between the second and third terminals to a constant voltage which is substantially independent of a temperature change; and a temperature-dependent current generating circuit connected to said first terminal and including a first diode element connected between fourth and fifth terminals, a third current/voltage converter connected between sixth and seventh terminals, a second diode element connected between the fifth and seventh terminals, and a second control circuit for controlling potentials of the fourth and sixth terminals to the same potential.