US Patent 11018627 Multi-bandwidth envelope tracking integrated circuit and related apparatus

A multi-bandwidth envelope tracking (ET) integrated circuit (IC) (ETIC) and related apparatus are provided. In a non-limiting example, the multi-bandwidth ETIC is coupled to an amplifier circuit(s) configured to amplify a radio frequency (RF) signal corresponding to a wide range of modulation bandwidth (e.g., from less than 90 KHz to over 40 MHz). In this regard, the multi-bandwidth ETIC is configured to generate different ET voltages based on the modulation bandwidth of the RF signal. By generating the ET voltages based on the modulation bandwidth of the RF signal, it may be possible to optimize operating efficiency of the amplifier circuit(s). As a result, it may be possible to improve power consumption and reduce heat dissipation in an apparatus employing the multi-bandwidth ETIC, thus making it possible to provide the multi-bandwidth ETIC in a wearable device.