Voltage control

An audio driving circuit comprising:

• a first transistor having a gate-source voltage tolerance;
• a power supply module configured to generate at least a first supply voltage for the audio driving circuit, wherein the audio driving circuit is operable in a first mode in which the first supply voltage has a first magnitude such that, in use, a voltage magnitude at a source terminal of the first transistor can exceed the gate-source voltage tolerance of the first transistor;
• a voltage generator configured to, in the first mode, output a first intermediate voltage to an intermediate voltage path for use as a gate control voltage for at least the first transistor, the first intermediate voltage having a magnitude lower than said first magnitude so as to maintain the magnitude of the gate-source voltage of the first transistor below said tolerance when applied to the gate of the first transistor;
• and
• an intermediate path voltage clamp for selectively voltage clamping the intermediate voltage path to a voltage level so as to maintain the magnitude of the gate-source voltage of the first transistor below said tolerance, wherein said voltage clamp is enabled by a reset condition for the audio driving circuit.