Invention Grant
US07933361B2 Hybrid DC-offset reduction method and system for direct conversion receiver 有权
用于直接转换接收机的混合直流偏移降低方法和系统

Hybrid DC-offset reduction method and system for direct conversion receiver
Abstract:
A hybrid structure circuit for the cancellation of both Type-I and Type-II DC offsets. It comprises a static compensator in conjunction with a servo-loop feedback amplifier to suppress the undesired DC components present along the path of the base band after the direct conversion mixer. Two mixers are used to down convert a received RF signal directly to a base band signal with two components: in-phase and quadrature-phase. Both in-phase and quadrature-phase branches employ the same circuitry for DC offset cancellation. Miller effect is also utilized in the structure in order to implement the circuit on-chip.
Information query
Patent Agency Ranking
0/0