首页>
外国专利>
DIFFERENCE FREQUENCY IMPEDANCE TRANSFORMATION CIRCUITS AND METHODS FOR PROVIDING SAME IN POWER AMPLIFIER SYSTEMS
DIFFERENCE FREQUENCY IMPEDANCE TRANSFORMATION CIRCUITS AND METHODS FOR PROVIDING SAME IN POWER AMPLIFIER SYSTEMS
展开▼
机译:功率放大器系统中的差频阻抗变换电路和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Difference frequency impedance transformation circuits for power amplifiers can change the impedance presented to an input of a power amplifier at a frequency that is a function of a difference between the receive and transmit frequency ranges. The difference frequency impedance transformation circuit may, therefore, reduce the noise at the difference frequency which may otherwise be mixed with the transmit frequencies to produce noise in the receive frequency range. In particular, difference frequency impedance transformation circuits can include a first circuit that conducts the first signals to an input of the power amplifier. A second circuit is electrically coupled to the input of the power amplifier and changes the impedance presented to the input of the power amplifier at the difference frequency. Related power amplifier systems, wireless user terminals, and methods are also disclosed.
展开▼