Abstract:
A fully integrated, programmable mixed-signal radio transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and outputs, the radio transceiver being programmable and configurable for multiple radio frequency bands and standards and being capable of connecting to many networks and service providers. The RFIC includes a tunable resonant circuit that includes a transmission line having an inductance, a plurality of switchable capacitors configured to be switched into and out of the tunable resonant circuit in response to a first control signal, and at least one variable capacitor that can be varied in response to a second control signal, wherein a center resonant frequency of the resonant circuit is electronically tunable responsive to the first and second control signals that control a first capacitance value of the plurality of switchable capacitors and a second capacitance value of the at least one variable capacitor.
Abstract:
Transmitter architectures designed to accommodate both constant and non-constant of envelope modulation schemes and capable of providing local oscillator carrier frequencies within any one of numerous desired frequency bands, thus allowing compliance with many different communication standards. One example of a programmable frequency synthesizer includes a plurality of transmitter components and a microcontroller coupled to the frequency synthesizer and to the plurality of transmitter components. The microcontroller is adapted to provide a frequency control signal to the frequency synthesizer to control a frequency of the local oscillator carrier frequency. In addition, the microcontroller is also adapted to provide digital control signals to at least some of the plurality of transmitter components to turn on and off different ones of the plurality of transmitter components based on an operating mode of the transmitter, such that the transmitter can accommodate both constant envelope modulation and non-constant envelope modulation schemes.
Abstract:
A frequency synthesizer capable of high speed, low power, wideband operation including a method of gain compensation, and a method of fast voltage controlled oscillator (VCO) band calibration. In addition, the frequency synthesizer may include two or more switchable independent loop filters to facilitate wideband operation. Such a frequency synthesizer may be used in many applications, and in one example, may be particularly suitable for use in a multi-band, multi-standard transmitter or radio transceiver.
Abstract in simplified Chinese:发送器架构系设计成适应固定及非固定二者之波封调制机制,且能提供本地振荡器载波频率于许多所欲频带之任一频带内,因而允许遵循许多不同的通信标准。可进程频率合成器之一实例包含复数个发送器组件及耦接至该频率合成器和该复数个发送器组件之单片机,该单片机系适于提供频率控制信号至频率合成器,以控制本地振荡器载波频率的频率。此外,该单片机亦适于提供数码控制信号至该复数个发送器组件之至少一些发送器组件,以根据发送器之操作模式来开启及关闭该复数个发送器组件之不同者,使得发送器可适应固定波封调制及非固定波封调制二者之机制。
Abstract in simplified Chinese:一种可进程混合信号射频收发器系包含一个低成本射频集成电路,该射频集成电路系为频率及协定可诊断的,以提供一个具有数码输入及输出之完全集成电路射频收发器,且可建构用于多个射频频带及标准,且其系能够连接至许多网络、服务提供者或标准。该射频集成电路系包含一个可调整谐振电路,该可调整谐振电路系包含:至少一个传输线,其系具有一个电感器;复数个可切换电容器,其系建构成被切换至该可调整谐振电路且由该可调整谐振电路切换而来,以回应于一个第一控制信号;及至少一个可变电容器,其系能够被改变,以回应于一个第二控制信号,其中,该谐振电路之一个中央谐振频率系可以电子方式调整,以回应于该第一控制信号及该第二控制信号,该第一控制信号及该第二控制信号系控制该复数个可切换电容器之一个第一电容值及该至少一个可变电容器之一个第二电容值。
Abstract in simplified Chinese:一种频率合成器,其系能够包含高速、低功率及宽带之操作,该操作系包含一种增益补偿之方法,以及一种快速电压控制振荡器频带校准之方法。此外,该频率合成器系可以包含两个或更多个可切换独立回路滤波器,以便利宽带操作。如此之频率合成器系可以被使用于许多应用,且于一个范例中,系可以特别适合使用于一个多频带多标准发送器或射频收发器。
Abstract in simplified Chinese:一种完全集成、可进程之混合信号的收发器系包含一射频集成电路(RFIC),其为频率与通信协定不可知论者且具有数码输入与输出,该种收发器系可进程及可配置针对于多个射频带与标准且为能够连接至诸多网络与服务提供者。该RFIC系未运用螺旋状电感器而是包括传输线路电感器,允许改良的可扩充性。该种收发器之构件系可进程以允许收发器为切换于不同的操作频带之间。频率切换系可透过其耦接至构件之数码寄存器的内容而达成。