US 12,113,558 B2
Transmitter circuit
Christian Elgaard, Lund (SE); and Henrik Sjöland, Lund (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 18/003,026
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jun. 22, 2020, PCT No. PCT/EP2020/067335
§ 371(c)(1), (2) Date Dec. 22, 2022,
PCT Pub. No. WO2021/259448, PCT Pub. Date Dec. 30, 2021.
Prior Publication US 2023/0421184 A1, Dec. 28, 2023
Int. Cl. H04K 1/02 (2006.01); H03F 1/32 (2006.01); H03F 3/24 (2006.01); H03G 3/30 (2006.01); H04B 1/04 (2006.01); H04L 25/03 (2006.01); H04L 25/49 (2006.01)
CPC H04B 1/04 (2013.01) [H03F 1/3241 (2013.01); H03F 3/24 (2013.01); H03G 3/3042 (2013.01); H03F 2200/102 (2013.01); H04B 2001/0408 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A transmitter circuit, comprising:
a signal input for receiving an analog input signal;
a local oscillator, LO, input for receiving an LO signal;
a mixer circuit configured to generate a frequency-upconverted signal, wherein the mixer circuit has a first input, a second input, and an output for outputting an output signal of the mixer circuit, and wherein the second input of the mixer circuit is connected to the signal input of the transmitter circuit;
a power amplifier, PA, circuit having an input connected to the output of the mixer circuit and an output for outputting an output signal of the transmitter circuit;
a control circuit configured to generate a phase-control signal and a gain-control signal in response to an envelope of the analog input signal;
a phase-control circuit configured to generate a phase-adjusted LO signal in response to the LO signal and the phase-control signal and to supply the phase-adjusted LO signal to the first input of the mixer circuit; and
a gain-control circuit configured to control a gain of the transmitter circuit in response to the gain-control signal;
the gain control circuit being located in the mixer circuit and configured to operate on the analog input signal to generate an intermediate analog signal; and
the mixer circuit being configured to generate the frequency-upconverted signal in response to the phase-adjusted LO signal and the intermediate analog signal, and to output the frequency-upconverted signal at the output of the mixer circuit.