发明名称 |
IMPEDANCE TRANSFORMATION NETWORK FOR IMPROVED DRIVER CIRCUIT PERFORMANCE |
摘要 |
This disclosure provides systems, methods and apparatus for reducing harmonic emissions. One aspect of the disclosure provides a transmitter apparatus. The transmitter apparatus includes a driver circuit characterized by an efficiency and a power output level. The driver circuit further includes a filter circuit electrically connected to the driver circuit and configured to modify the impedance of the transmit circuit to maintain the efficiency of the driver circuit at a level that is within 20% of a maximum efficiency of the driver circuit when the impedance is within the complex impedance range. The filter circuit is further configured to maintain a substantially constant power output level irrespective of the reactive variations within the complex impedance range. The filter circuit is further configured to maintain a substantially linear relationship between the power output level and the resistive variations within the impedance range. |
申请公布号 |
US2016043574(A1) |
申请公布日期 |
2016.02.11 |
申请号 |
US201514887049 |
申请日期 |
2015.10.19 |
申请人 |
QUALCOMM Incorporated |
发明人 |
Low Zhen Ning;Wheatley, III Charles Edward |
分类号 |
H02J5/00;H02J17/00;H02J7/02;H03H7/38 |
主分类号 |
H02J5/00 |
代理机构 |
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代理人 |
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主权项 |
1. A transmitter device, comprising:
a driver circuit characterized by an efficiency, the driver circuit electrically connected to a transmit circuit having an impedance, the impedance of the transmit circuit within a complex impedance range including resistive and reactive variations, the complex impedance range defined by a minimum real impedance value, and a maximum real impedance, a ratio between the minimum and maximum real impedance value being at least two to one; and a filter circuit electrically connected to the driver circuit and configured to modify the impedance of the transmit circuit to maintain the efficiency of the driver circuit at a level that is within 20% of a maximum efficiency of the driver circuit when the impedance is within the complex impedance range. |
地址 |
San Diego CA US |