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    • 7. 发明授权
    • Bi-directional access point
    • 双向接入点
    • US07183871B2
    • 2007-02-27
    • US09851371
    • 2001-05-07
    • Martin SperberShaun Shariatmadar
    • Martin SperberShaun Shariatmadar
    • H03H7/38
    • H04N7/102
    • An improved bi-directional access point includes an impedance boosting section in conjunction with an interface section to a bi-directional communication path. The impedance boosting section incorporates a transformer tap output that couples to an access connection point where signals on the bi-directional communication path may be monitored. The impedance boosting section may be a tapped transformer winding that includes N1 turns above the winding tap and N2 turns below the winding tap, where N1>N2. The interface section may be implemented as a resistive interface section. Additionally, the bi-directional access point may further include a tuning section for the access connection point. Implemented as a resistive network, for example, the tuning section may help establish a tap value and return loss through the access connection point below a prescribed level (e.g.,−20 dB).
    • 改进的双向接入点包括结合到双向通信路径的接口部分的阻抗提升部分。 阻抗提升部分包含变压器抽头输出,其耦合到可以监视双向通信路径上的信号的接入连接点。 阻抗提升部分可以是抽头变压器绕组,其包括绕组抽头上方的N 1匝,并且N 2匝在绕组抽头下方,其中N 1> N 2。 接口部分可以被实现为电阻接口部分。 另外,双向接入点还可以包括用于接入连接点的调谐部分。 例如,作为电阻网络实现,调谐部分可以帮助建立抽头值并且通过接入连接点将返回损耗降低到规定的电平以下(例如,-20dB)。