Amplifying apparatus with improved linearity

An amplifying apparatus comprising:

• an amplifying circuit comprising a power amplifier, a temperature detection circuit, and a bias circuit, wherein the temperature detection circuit is configured to detect an ambient temperature of the power amplifier to output a temperature voltage, and the bias circuit is configured to regulate an internal current based on a control signal to supply a bias current obtained by the regulation to the power amplifier;
• and
• a temperature control circuit configured to generate the control signal based on the temperature voltage during an initial driving from a transmission mode starting point in time to an input point in time at which an input signal is input, and output the control signal to the amplifying circuit,
• wherein the temperature control circuit comprises a temperature voltage converter configured to convert the temperature voltage into a detection voltage, and a comparison circuit configured to compare the detection voltage and a reference voltage with each other and output a comparison signal that has a level that is based on a result of the comparison result.