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Detail
Registered LOOP FILTER AND PHASE LOCKED LOOP INCLUDING THE SAME
- Inventors
- Min Byung Hun, Yu Hyun Kyu, Lee. Young-Jae
- Application No.
- 12860498 (2010.08.20)
- Publication No.
- 20110115535 (2011.05.19)
- Registration No.
- 8258832 (2012.09.04)
- Country
- UNITED STATES
- Project Code
- 09MB2200, Development of Advanced Digital RF Technology for Next Generation Wireless Convergence Terminals, Yu Hyun Kyu
- Abstract
- 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.