The present disclosure is directed a wideband multiphase transmitter with two-point modulation. A transmitter includes a control circuit configured to receive a source signal having amplitude and phase components. Using the phase component, the control circuit generates a frequency control signal and a phase jump signal. The transmitter further includes a phase conversion circuit configured to generate a first phase-modulated signal using the phase component and the frequency control signal. The phase conversion circuit is also configured to adjust the phase of the first phase-modulated signal using the phase jump signal. The first phase-modulate signal and the amplitude component are provided to an amplifier, which generates a transmit signal based thereon.