Driver circuitry

Driver circuitry for receiving a digital input signal and outputting, at first and second output nodes, first and second analogue driving signals respectively for driving a bridge-tied-load, the driver circuitry comprising:

• first and second digital-to-analogue converters configured to receive the digital input signal, wherein outputs of the first and second digital-to-analogue converters are coupled to the first and second output nodes respectively;
• a differential-output amplifier circuit having outputs connected to the first and second output nodes respectively, wherein the differential-output amplifier circuit is configured to regulate the outputs of first and second digital-to-analogue converters at the first and second output nodes to provide the first and second analogue driving signals;
• and
• a common-mode regulating amplifier having a first input coupled to receive the defined common-mode voltage, a second input coupled to receive an indication of the common-mode voltage at the first and second output nodes and an output coupled to the common input node;
• wherein the differential-output amplifier circuit comprises first and second amplifiers with respective outputs coupled to the first and second output nodes respectively and wherein a first input of the first amplifier and first input of the second amplifier are coupled to a common-input node, the common input node being configured to receive a voltage based on a defined common-mode voltage.