A differential dynamic charge pump circuit comprising; a first charging stage in series with a second charging stage; the first charging stage comprising a first circuit input for receiving an alternating clock signal; a second circuit input for receiving an inverted version of the alternating clock signal; a first output inverter arrangement configured to receive output voltages from upper and lower charge pump arrangements and having a first output and a second output for providing a dynamic differential output; the second charging stage comprising a first input and a second input configured to receive the output signal from the first stage; a second output inverter arrangement configured to receive output voltages from upper and lower charge pump arrangements and having a first output and a second output for providing a dynamic differential output of the circuit.