Patent ID: 7102443

Claim:
An amplifier circuit with a temperature-stabilized overall gain factor, which specifies the amplification of an input voltage (VIN) into an output voltage (VOUT) and which is a product of a first gain factor (S) and a second gain factor (R 1 ), the amplifier circuit comprising: first means for generating an intermediate signal in the form of an intermediate current from the input voltage and the first gain factor further comprising: a current source; and a transconductance amplifier, at whose input the input voltage is present and at whose output the intermediate current is provided, a signal-amplifying MOS transistor of the transconductance amplifier which is fed from the current source via a source terminal thereof being operated below a threshold voltage associated therewith, and second means for generating the output voltage from the intermediate signal and the second gain factor, wherein the current provided by the current source and, dependent thereon, also the first gain factor have opposite temperature dependencies with respect to the second gain factor.