Pulse shaping biasing circuitry

A radio frequency (RF) transmitter section for a mobile terminal comprising:

• a modulator configured to receive a baseband signal and modulate the baseband signal at a desired carrier frequency;
• RF power amplifier circuitry coupled to the modulator and configured to receive the baseband signal from the modulator and amplify the baseband signal for transmission from an antenna;
• and
• pulse shaping biasing circuitry coupled to the RF power amplifier circuitry and configured to linearize a gain response of the RF power amplifier circuitry and comprising:
• signal summation circuitry coupled to a biasing input of the RF power amplifier circuitry;
• square wave signal generator circuitry coupled between an input node and the signal summation circuitry, the square wave signal generator circuitry configured to generate a square wave signal;
• and
• inverse ramp signal generator circuitry coupled in parallel with the square wave signal generator circuitry between the input node and the signal summation circuitry and configured to generate an inverted ramp signal based on a supply voltage and a temperature of the pulse shaping biasing circuitry.