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1. 发明授权

US08406723B1 Radio frequency filter having an active inductor 有权
标题翻译：具有有源电感的射频滤波器
公开(公告)号：US08406723B1
公开(公告)日：2013-03-26
申请号：US12366458
申请日：2009-02-05
申请人： Ryan Lobo , Timothy M. Magnusen
发明人： Ryan Lobo , Timothy M. Magnusen
IPC分类号： H04B1/16
CPC分类号： H04B1/30
摘要： Systems and methods which provide DC current path circuitry, such as for providing a DC bias, in association with a filter circuit such that parasitic attributes of the DC current path circuitry combines with the filter component attributes are shown. According to embodiments, the parasitic attributes of the DC current path circuitry components are added into the associated filter circuit network design. A parasitic capacitance of the DC current path circuitry may, for example, be aggregated with a capacitor of the filter circuit to eliminate or mitigate the effect of the presence of the DC current path circuitry on the associated filter frequency response. Embodiments implement an active inductor configuration for providing a DC current path in association with a filter circuit. An active inductor of embodiments is provided using a transistor, appropriately biased to actively exhibit low impedance at DC and high impedance at RF frequencies.
摘要翻译：提供DC电流路径电路的系统和方法，例如用于提供DC偏置，与滤波器电路相关联，使得DC电流路径电路的寄生属性与滤波器组件属性相结合。根据实施例，DC电流路径电路组件的寄生属性被添加到相关联的滤波器电路网络设计中。 DC电流路径电路的寄生电容可以例如与滤波器电路的电容器聚合，以消除或减轻直流电流路径电路的存在对相关滤波器频率响应的影响。实施例实施有源电感器配置，用于与滤波器电路相关联地提供DC电流路径。使用适当偏置的晶体管提供实施例的有源电感器，以在DC处有效地表现出低阻抗并且在RF频率处具有高阻抗。

2. 发明申请

US20060105731A1 Circuit and method for reducing direct current biases 有权
标题翻译：减少直流偏压的电路和方法
公开(公告)号：US20060105731A1
公开(公告)日：2006-05-18
申请号：US10990400
申请日：2004-11-18
申请人： Terence Johnson , Nitin Sharma , Ryan Lobo
发明人： Terence Johnson , Nitin Sharma , Ryan Lobo
IPC分类号： H04B1/10
CPC分类号： H03D3/008 , H04B1/71637
摘要： A method is provided for reducing a DC bias in a receiver. This method includes isolating a second circuit portion from a first circuit portion (535) and determining a second DC bias correction value for the second circuit portion that will eliminate a second DC bias at the isolated second circuit portion (540). The second circuit portion is then connected to the first circuit portion (550) and a bias-maximizing code word is generated at the first circuitry (505). A first DC bias correction value is then determined that will eliminate a first DC bias at the first circuit portion (555). The bias-maximizing code word is formed such that: a first integrated value of a first half of the bias-maximizing code word has a positive value, and a second integrated value of a second half of the bias-maximizing code word over half of the code word length has a negative value.
摘要翻译：提供了一种减少接收机中的直流偏压的方法。该方法包括从第一电路部分（535）隔离第二电路部分，并且确定将消除隔离的第二电路部分（540）处的第二DC偏置的第二电路部分的第二DC偏置校正值。然后，第二电路部分连接到第一电路部分（550），并且在第一电路（505）处产生偏置最大化码字。然后确定将消除第一电路部分处的第一DC偏压（555）的第一DC偏置校正值。偏置最大化码字形成为：偏置最大化码字的前半部分的第一积分值具有正值，偏差最大化码字的第二半的第二积分值超过偏差最大化码字的一半以上码字长度为负值。

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