发明名称 |
Broadband high efficiency amplifier system |
摘要 |
Systems and methods are provided for generating a modulated radio frequency (RF) output signal representing a baseband input signal. A digitizer is configured to sample the baseband input signal and produce an N-bit binary digital signal representing a scaled linear function of the signal amplitude. An RF signal source configured to produce an RF carrier signal. N amplifier paths each include at least one amplifier configured to receive the RF carrier signal as an input and provide a corresponding output RF signal. The amplifiers associated with each of the N amplifier paths are active only when a corresponding bit of the digital signal assumes a first value. A power combiner assembly is configured to combine the outputs of the plurality of amplifier paths to deliver the modulated RF output signal. |
申请公布号 |
US8948306(B2) |
申请公布日期 |
2015.02.03 |
申请号 |
US201313739505 |
申请日期 |
2013.01.11 |
申请人 |
Gatesair, Inc. |
发明人 |
Borodulin Dmitri;Cabrera George |
分类号 |
H03C1/52;H04L27/04;H03F3/19;H03F3/60;H03F3/72 |
主分类号 |
H03C1/52 |
代理机构 |
Tarolli, Sundheim, Covell & Tummino LLP |
代理人 |
Tarolli, Sundheim, Covell & Tummino LLP |
主权项 |
1. A system for generating a modulated radio frequency (RF) output signal representing an analog baseband input signal, the system comprising:
a digitizer configured to sample the analog baseband input signal and produce an N-bit digital signal representing a scaled linear function of the signal amplitude, where N is an integer greater than one, the digitizer utilizing an analog-to-digital amplitude converter with equal input voltage steps to provide the N-bit digital signal as a series of multi-bit binary word values, with each multi-bit binary word value varying in proportion to the instantaneous amplitude of the input signal at respective sampling times; an RF signal source configured to produce an RF carrier signal; N amplifier paths, each comprising at least one amplifier configured to receive the RF carrier signal as an input and provide a corresponding output RF signal, the amplifiers associated with each of the N amplifier paths being active only when a corresponding bit of the digital signal assumes a first value and each of the N amplifier paths providing a maximum voltage out that is different from each other of the N amplifier paths; and a power combiner assembly configured to combine the outputs of the plurality of amplifier paths to deliver the modulated RF output signal. |
地址 |
Mason OH US |