광대역 고효율 송신기를 위한 연속시간 저역 통과 델타-시그마 변조기
조영균, 이성준, 장승현, 박봉혁, 이광천, 정재호
- 9014281 (2015.04.21)
12MI1300, 차세대 이동통신 기지국용 Class-S 전력증폭기 기술 연구,
- A delta-sigma modulator and a transmitter apparatus including the same are disclosed. The delta-sigma modulator includes a first integrator, a second integrator, a first comparator configured to compare an output signal of the second integrator and a reference signal, and output a first comparison signal, a second comparator configured to compare the output signal of the second integrator and the reference signal, and output a second comparison signal, a first DAC configured to output the first signal corresponding to the first comparison signal and the second comparison signal, a second DAC configured to output the second signal corresponding to the first comparison signal and the second comparison signal, a delayer configured to generate a delayed signal that delays the first comparison signal and the second comparison signal by a predetermined time, and an output DAC configured to generate an output signal having a multi-level corresponding to the delayed signal.
- KSP 제안 키워드
- Delta-Sigma Modulator, Multi-level, Reference signal, delta-sigma