Supply modulation transmitter with switch network

A circuit comprising:

• a multi-output power supply having a first plurality of outputs;
• a modulator circuit having an input and an output with the input coupled to at least one of the plurality of outputs of the multi-output power supply, the modulator circuit configured to receive a control signal and in response thereto to provide a modulated output signal at the output thereof;
• at least one pulse shaping network (PSN) having at least one passive element, the PSN having an input coupled to the output of the modulator circuit and having an output, the PSN configured to filter a modulated output signal provided thereto from the modulator circuit;
• a radio frequency (RF) amplifier having a bias terminal coupled to the output of the PSN;
• and
• a switching network having one or more switches, the switching network coupled to one or more of:
• the modulator circuit;
• and the pulse shaping circuit;
• and
• wherein:
• the switching network is configured such that in a first state, the switching network provides a first signal path having a first filter configuration between the modulator circuit and the bias terminal of the RF amplifier and in a second state, the switching network provides a second signal path having a second, different filter configuration between the modulator circuit and the bias terminal of the RF amplifier.