Logarithmic current-to-voltage conversion circuit having temperature compensation function

A logarithmic current-to-voltage conversion circuit having a temperature compensation function, comprising:

• a logarithmic current-to-voltage conversion buffer unit, a positive temperature coefficient compensation unit and a self-heating unit, wherein
• the logarithmic current-to-voltage conversion buffer unit is provided with a reference circuit consistent with a basic logarithmic circuit, and a temperature coefficient is reflected by a difference value ΔVbe between an output of the basic logarithmic circuit and an output of the reference circuit;
• and
• the positive temperature coefficient compensation unit is provided with a voltage-to-current conversion circuit at a first stage and a current mirror at a second stage, and the positive temperature coefficient compensation unit outputs a voltage Vout through an external resistor R2, an input of the positive temperature coefficient compensation unit is connected to ΔVbe, and the voltage-to-current conversion circuit is provided with a resistor R0 and an adjustable resistor R1 connected in series, wherein a temperature coefficient of (R1+R0)/R2 is corrected by adjusting a value of the adjustable resistor R1.