Reference voltage generation circuit responsive to ambient temperature

A reference voltage generation circuit, comprising:

• a current generation circuit which generates current and that includes:
• a current mirror circuit which is connected in series between a first node and a power source node and between a second node and a power source node and which performs control so that current flowing in the second node becomes an integer multiple of current flowing in the first node;
• and a fourth resistor connected in series between the second node and a ground node;
• and
• a current-voltage conversion circuit which converts the current generated by said current generation circuit into voltage to generate reference voltage, said current-voltage conversion circuit further including an input circuit, connected in series between a reference voltage node which generates reference voltage and a power source node, into which mirror current of said current mirror circuit is inputted,
• wherein said current generation circuit generates current which varies in value according to ambient temperature of said current generation circuit,
• wherein said current-voltage conversion circuit has a first resistor and a second resistor in which the current generated by the said current generation circuit flows, said first resistor being connected in series between the reference voltage node and a third node and said second resistor being connected in series between the third node and a ground node,
• wherein one of said first resistor and said second resistor has a positive temperature coefficient and the other has a negative temperature coefficient.

A reference voltage generation circuit, comprising:

• a current generation circuit which generates current;
• and
• a current-voltage conversion circuit which converts the current generated by said current generation circuit into voltage to generate reference voltage,
• wherein said current generation circuit generates current which varies in value according to ambient temperature of said current generation circuit,
• said current-voltage conversion circuit has a first resistor and a second resistor in which the current generated by the said current generation circuit flows, and
• one of said first resistor and said second resistor has a positive temperature coefficient and the other has a negative temperature coefficient,
• wherein at least one of said resistor having the positive temperature coefficient and said resistor having the negative temperature coefficient is any of a variable resistor and a trimming circuit.

A reference voltage generation circuit comprising:

• a current generation circuit which generates current;
• and
• a current-voltage conversion circuit which converts the current generated by said current generation circuit into voltage to generate reference voltage,
• wherein said current generation circuit is a circuit that generates current which varies in value according to an ambient temperature of said current generation circuit, said current generation circuit includes:
• a first diode connected in series between a first node and a ground node;
• a second diode and a third resistor connected in series between a second node and a ground node;
• and a feedback circuit, connected in series between a power source node and the first node and between a power source node and the second node, and performing control so as to make a potential of the first node equal to a potential of the second node, and
• said current-voltage conversion circuit includes:
• a first input circuit connected in series between a fourth node and a power source node and into which the current generated by said current generation circuit is inputted;
• an operational amplifier having an inverting input terminal connected to the fourth node;
• a second input circuit, connected in series between a non-inverting input terminal of the operational amplifier and a power source node, and receiving the current generated by said current generation circuit;
• a fifth resistor connected between the inverting input terminal and an output terminal of the operational amplifier;
• a sixth resistor connected in series between the non-inverting input terminal of the operational amplifier and a ground node;
• a seventh resistor connected in series between the fourth node and a ground node;
• and an eighth resistor connected in series between the fourth node and the inverting input terminal of said operational amplifier, and
• at least one of the fifth resistor, the sixth resistor, the seventh resistor, and the eighth resistor has a positive temperature coefficient, and at least one of the other resistors has a negative temperature coefficient.