发明名称 |
AMPLIFIER WITH A QUADRATURE AMPLITUDE MODULATION (QAM) MODULATED AND A CONTINUOUS WAVE AUTOMATIC GAIN CONTROL (AGC) CIRCUIT |
摘要 |
<p>The present invention is directed to systems and methods for providing an AGC circuit for maintaining a constant output power level from an amplifier. More specifically, the AGC circuit includes a circuitry for determining whether an input signal is a QAM or a CW signal. A QAM/CW gain switch is then controlled depending upon the input signal. Depending upon the mode of the QAM/CW gain switch, the AGC circuit either attenuates the power level of the signal or bypasses the signal. The bypassed or attenuated signal is then compared to a reference signal so that the AGC circuit produces an adjusting voltage accordingly. The amplifier finally receives the adjusting voltage and attenuates the output power level of the signal.</p> |
申请公布号 |
WO2009015128(A1) |
申请公布日期 |
2009.01.29 |
申请号 |
WO2008US70730 |
申请日期 |
2008.07.22 |
申请人 |
SCIENTIFIC-ATLANTA, INC.;AO, JIENING |
发明人 |
AO, JIENING |
分类号 |
H03G3/20 |
主分类号 |
H03G3/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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