루프필터 및 이를 포함하는 위상 고정 루프
민병훈, 유현규, 이영재
- 8258832 (2012.09.04)
- Provided is a loop filter which receives first and second currents whose current ratio is n (where n is a natural number). The loop filter includes a first-order filter path, a second-order filter path, and a third-order filter path. The first-order filter path includes an operational amplifier generating an output impedance by increasing by as much as n times an impedance of a second input node to which the second current is applied. The first-order filter path performs a first-order filtering on the first current applied to a first input node by using the operational amplifier. The second-order filter path performs a second-order filtering on the first current applied to the first input node. The third-order filter path performs a third-order filtering on the first current applied to the first input node.
- KSP 제안 키워드
- Current ratio, First-order filter, Operational Amplifiers(Op-Amps), Order filter, Output impedance, Phase locked loop(PLL), Third-order, first-order, loop-filter(LF), phase locked, second-order, second-order filter