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2. 发明授权

US06895226B1 Multimode transceiver circuit 有权
标题翻译：多模收发电路
公开(公告)号：US06895226B1
公开(公告)日：2005-05-17
申请号：US10130442
申请日：2000-11-17
申请人： Ian J Forster , Adrian N Farr , Norman A Howard
发明人： Ian J Forster , Adrian N Farr , Norman A Howard
IPC分类号： G01S7/03 , G06K7/00 , G06K19/07 , H04B1/40
CPC分类号： G06K19/07758 , G01S7/034 , G06K7/0008 , G06K19/0723
摘要： A multimode transceiver circuit comprises a four port coupler of a type which splits a signal applied to one port between two of the other ports. The split signals are phase shifted by a known amount. A first port of the coupler is for receiving a signal and for outputting a signal therefrom. A controllable oscillator is connected to a second port of the coupler and switchable impedances (Schottky diodes) are connected to the remaining ports. A controller is provided for controlling the operation of the oscillator and the impedances to determine the mode of operation of the circuit. In one mode of operation, the oscillator is inoperative and at least one of the impedances is switched to operate as a non-linear impedance such that the circuit detects amplitude-modulation of the signal applied to the first port. In a further mode of operation, the oscillator is operable and both impedances are switched to operate as non-linear impedance elements such that they operate as a mixer to produce an intermediate frequency signal in dependence on the signal applied to the first port. In yet a further mode of operation, the oscillator is operable, and the impedances are switched such that the oscillator frequency appears at the first port for transmission therefrom.
摘要翻译：多模收发器电路包括四端口耦合器，其类型是将施加到两个其它端口之间的一个端口的信号分开。分离信号以已知量相移。耦合器的第一端口用于接收信号并从其输出信号。可控振荡器连接到耦合器的第二端口，并且可切换阻抗（肖特基二极管）连接到其余端口。提供控制器用于控制振荡器的操作和阻抗以确定电路的操作模式。在一种操作模式中，振荡器不工作，并且至少一个阻抗被切换以作为非线性阻抗工作，使得该电路检测施加到第一端口的信号的幅度调制。在另一操作模式中，振荡器是可操作的，并且两个阻抗都被切换为非线性阻抗元件，以使得它们作为混频器工作，以根据施加到第一端口的信号产生中频信号。在另一种操作模式中，振荡器是可操作的，并且阻抗被切换，使得振荡器频率出现在第一端口以便从其传输。

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