US 12,231,143 B2
Radio transmitter providing an analog signal with both radio frequency and baseband frequency information
Mark Cope, Bath (GB); and Antonio Montalvo, Raleigh, NC (US)
Assigned to Analog Devices International Unlimited Company, County Limerick (IE)
Filed by Analog Devices International Unlimited Company, Limerick (IE)
Filed on Nov. 22, 2022, as Appl. No. 18/057,933.
Claims priority of provisional application 63/286,288, filed on Dec. 6, 2021.
Prior Publication US 2023/0179222 A1, Jun. 8, 2023
Int. Cl. H03M 1/66 (2006.01); H04B 1/04 (2006.01)
CPC H03M 1/662 (2013.01) [H04B 1/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radio frequency (RF) communication system comprising:
a transmitter configured to receive digital signal data and to output a combined analog signal having a low frequency content corresponding to an analog baseband control signal and a high frequency content corresponding to an RF transmit signal;
a low pass filter configured to filter the combined analog signal to generate the analog baseband control signal;
a high pass filter configured to filter the combined analog signal to generate the RF transmit signal;
a power amplifier configured to amplify the RF transmit signal; and
a modulator configured to modulate a supply voltage of the power amplifier based on the analog baseband control signal.