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1. 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。

2. 发明授权

US07046957B1 Reflecting modulator circuit comprising a negative impedance amplifier 有权
标题翻译：反射调制器电路，包括负阻抗放大器
公开(公告)号：US07046957B1
公开(公告)日：2006-05-16
申请号：US10019140
申请日：2000-06-07
申请人： Adrian N Farr , Ian J Forster
发明人： Adrian N Farr , Ian J Forster
IPC分类号： H04B7/15
CPC分类号： H04L27/2039
摘要： A modulator circuit comprises a negative impedance amplifier which is operable such that a signal applied to the amplifier is reflected and amplified. Switching circuitry is provided for switching the impedance of the amplifier between two reflecting states such that the reflected and amplified signal is phase modulated. The impedances of the negative impedance amplifier are selected such that the phase of the reflected and amplified signal switches by substantially 180°. Preferably, the impedances of the negative impedance amplifier in the two reflecting states are selected such that the reflection gain of the amplifier in the two reflecting states is substantially the same such that the reflected and amplified signal is a binary phase shift keyed.
摘要翻译：调制器电路包括负阻抗放大器，其可操作使得施加到放大器的信号被反射和放大。提供开关电路用于在两个反射状态之间切换放大器的阻抗，使得反射和放大的信号被相位调制。选择负阻抗放大器的阻抗，使得反射和放大的信号的相位基本上切换180°。优选地，选择两个反射状态下的负阻抗放大器的阻抗，使得两个反射状态中的放大器的反射增益基本上相同，使得反射和放大的信号是二进制相移键控的。

3. 发明授权

US07065328B1 Superregenerative AM demodulator 失效
公开(公告)号：US07065328B1
公开(公告)日：2006-06-20
申请号：US10018762
申请日：2000-06-01
申请人： Ian J Forster , Adrian N Farr
发明人： Ian J Forster , Adrian N Farr
IPC分类号： H04B1/40
CPC分类号： G01S19/36 , H03D11/04
摘要： An AM receiver incorporates an antenna, a transistor, a current source, and a power supply. The antenna is connected to a gate electrode of the transistor and through a link to a signal earth. In operation, the antenna receives radiation and generates a corresponding input signal which propagates to the gate electrode. The transistor is operable to process the input signal in two steps, namely to reflectively amplify the input signal to generate a correspondingly reflectively amplified input signal at the gate electrode in a first step, and amplitude demodulate the amplified input signal in a second step. The transistor is operable in a non-linear region of its current/voltage characteristic whereas it simultaneously provides reflective amplification and signal demodulation, namely the two steps occur simultaneously. In contradistinction, conventional demodulators employing gain devices operating non-linearly to provide amplitude demodulation incorporate the devices configured to function as transmission amplifiers.

4. 发明授权

US07551903B2 Reflecting modulator circuit comprising a negative impedance amplifier 有权
标题翻译：反射调制器电路，包括负阻抗放大器
公开(公告)号：US07551903B2
公开(公告)日：2009-06-23
申请号：US11434571
申请日：2006-05-15
申请人： Adrian N Farr , Ian J Forster
发明人： Adrian N Farr , Ian J Forster
IPC分类号： H04B7/15
CPC分类号： H04L27/2039
摘要： A modulator circuit comprises a negative impedance amplifier which is operable such that a signal applied to the amplifier is reflected and amplified. Switching means are provided for switching the impedance of the amplifier between two reflecting states such that the reflected and amplified signal is phase modulated. The impedances of the negative impedance amplifier are selected such that the phase of the reflected and amplified signal in the first reflecting state differs substantially from the phase of the reflected and amplified signal in a second reflecting state. For example, the phase switches by substantially 180 degrees. Preferably the impedances of the negative impedance amplifier in the two reflecting states are selected such that the reflection gain of the amplifier in the two reflecting states is substantially the same such that the reflected and amplified signal is a binary phase shift keyed.
摘要翻译：调制器电路包括负阻抗放大器，其可操作使得施加到放大器的信号被反射和放大。提供了切换装置，用于在两个反射状态之间切换放大器的阻抗，使得反射和放大的信号被相位调制。选择负阻抗放大器的阻抗，使得第一反射状态下的反射和放大信号的相位在第二反射状态下与反射和放大信号的相位显着不同。例如，相位切换大致180度。优选地，选择两个反射状态中的负阻抗放大器的阻抗，使得两个反射状态中的放大器的反射增益基本相同，使得反射和放大的信号是二进制相移键控的。

5. 发明授权

US07260372B2 GPS receiver with reflection amplifiers 有权
标题翻译：带有反射放大器的GPS接收机
公开(公告)号：US07260372B2
公开(公告)日：2007-08-21
申请号：US11472051
申请日：2006-06-20
申请人： Ian J Forster , Adrian N Farr
发明人： Ian J Forster , Adrian N Farr
IPC分类号： H04B1/06
CPC分类号： G01S19/36 , H03D11/04
摘要： An AM receiver incorporates an antenna, a transistor, a current source, and a power supply. The antenna is connected to a gate electrode of the transistor and through a link to a signal earth. In operation, the antenna receives radiation and generates a corresponding input signal which propagates to the gate electrode. The transistor is operable to process the input signal in two steps, namely to reflectively amplify the input signal to generate a correspondingly reflectively amplified input signal at the gate electrode in a first step, and amplitude demodulate the amplified input signal in a second step. The transistor is operable in a non-linear region of its current/voltage characteristic whereas it simultaneously provides reflective amplification and signal demodulation, namely the two steps occur simultaneously. In contradistinction, conventional demodulators employing gain devices operating non-linearly to provide amplitude demodulation incorporate the devices configured to function as transmission amplifiers.
摘要翻译： AM接收器包括天线，晶体管，电流源和电源。天线连接到晶体管的栅电极，并通过与信号接地的连接。在操作中，天线接收辐射并产生传播到栅电极的相应输入信号。晶体管可操作以两步处理输入信号，即在第一步骤中反射放大输入信号以在栅电极处产生相应的反射放大的输入信号，并在第二步骤中对放大的输入信号进行幅度解调。晶体管可在其电流/电压特性的非线性区域中操作，同时提供反射放大和信号解调，即两个步骤同时发生。相反，采用非线性运算的增益器件提供幅度解调的常规解调器结合了被配置为用作发射放大器的器件。

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