| 摘要 |
Systems and techniques relating to wireless communication devices and digital power amplifiers include, according to an aspect, an apparatus including: processor electronics; transceiver electronics coupled with the processor electronics, the transceiver electronics including modulation circuitry and a digital power amplifier coupled with the modulation circuitry; a clock source coupled with the transceiver electronics to provide a clock signal from the clock source to the digital power amplifier at a sampling clock frequency; a local oscillator coupled with the transceiver electronics to provide a local oscillator signal from the local oscillator to the modulation circuitry at a local oscillator frequency; and one or more antennas coupled with the digital power amplifier in the transceiver electronics; wherein the local oscillator frequency is an integer multiple of the sampling clock frequency; and wherein a parasitic frequency response of circuitry in the transceiver electronics acts as an implicit out-of-band filter to remove alias signals. |
