Low noise radio frequency switching circuitry

A mobile terminal comprising:

• a power amplifier (PA) for amplifying signals to be transmitted from the mobile terminal;
• a receiver adapted to receive signals to be processed by the mobile terminal;
• and
• antenna switching circuitry adapted to selectively place an antenna in contact with the PA and the receiver, the antenna switching circuitry comprising:
• one or more RF switching elements;
• and
• support circuitry for maintaining the state of the one or more RF switching elements, the support circuitry comprising:
• a dual-mode oscillator adapted to generate a high frequency oscillating signal during a boost mode of operation and generate a low frequency oscillating signal during a normal mode of operation;
• frequency selection circuitry coupled to the dual-mode oscillator and adapted to switch the dual-mode oscillator between the boost mode of operation and the normal mode of operation;
• and
• charge pump switching circuitry adapted to receive an oscillating signal from the dual-mode oscillator and a supply voltage and produce a stepped-up output voltage.