US 7,253,695 B2 · Function generating circuit and temperature characteristic controlling method for function generating circuit

Abstract

In a function generating circuit which comprises a temperature sensor 1 for outputting an output current (Ilin) with a linear temperature characteristic or an output voltage (Vlin) with the linear temperature characteristic, a cubic function generating circuit 2 for receiving the output current (Ilin) or the output voltage (Vlin) of the temperature sensor 1 as an input and generating a cubic temperature characteristic voltage (Vcub), and a control data storing circuit 3 for recording control data to control the output characteristic of the cubic function generating circuit 2, an external control signal is applied to the temperature sensor 1 from an external control terminal 4 to cause the sensor to output variably the output current (Ilin) or the output voltage (Vlin) such that the temperature characteristic of the cubic function generating circuit 2 can be controlled at the ordinary temperature.

Claims13

Dependent claims

A function generating circuit comprising:

a temperature sensor, outputting a temperature characteristic signal in response to an ambient temperature;
a function generating portion, generating a function signal having a characteristic corresponding to the ambient temperature based on the temperature characteristic signal;
a control data storing portion, recording control data to control the characteristic of the function signal;
and
an external inputting portion, inputting an external control signal to vary an input of the function generating portion,
wherein the temperature sensor outputs a difference between a first current generated by a resistor including a first linear temperature characteristic and a second current generated by a resistor including a second linear temperature characteristic as the temperature characteristic signal which is in proportion to the temperature, and varies a value of the first current or a value of the second current based on the external control signal.

3 more elements

Dependencies are inferred from the claim text.

Function generating circuit and temperature characteristic controlling method for function generating circuit

Life of this patent

Function generating circuit and temperature characteristic controlling method for function generating circuit

Life of this patent

Abstract

Claims13