公开(公告)号：US07295068B2

公开(公告)日：2007-11-13

申请号：US11134684

申请日：2005-05-19

申请人： Peter Capofreddi ,  Arvin Ramesh Shahani ,  Derek Shaeffer ,  Korhan Titizer

发明人： Peter Capofreddi ,  Arvin Ramesh Shahani ,  Derek Shaeffer ,  Korhan Titizer

IPC分类号： H03F3/45

CPC分类号： H03F3/45183 ,  H03F3/45672

摘要： A transconductance cell is disclosed that includes a first transistor and a second transistor. A regulator regulates an average voltage in response to a reference voltage, where the average voltage corresponds to the average of a voltage at a bias terminal of the first transistor and a voltage at a bias terminal of the second transistor. A mixer including the transconductance cell is also disclosed. In the mixer, the transconductance cell receives a differential input voltage and produces a differential output current. The mixer also includes one or more switches that multiply the differential output current with an oscillator signal. A method is disclosed that includes measuring an average voltage of a voltage at a bias terminal of a first transistor and a voltage at a bias terminal of a second transistor and regulating the average voltage responsive to the measured average voltage and a reference voltage.

摘要翻译： 公开了一种跨导单元，其包括第一晶体管和第二晶体管。 调节器响应于参考电压来调节平均电压，其中平均电压对应于第一晶体管的偏置端子处的电压的平均值和第二晶体管的偏置端子处的电压。 还公开了包括跨导电池的混合器。 在混频器中，跨导单元接收差分输入电压并产生差分输出电流。 混频器还包括一个或多个将差分输出电流与振荡器信号相乘的开关。 公开了一种方法，其包括测量第一晶体管的偏置端子处的电压的平均电压和第二晶体管的偏置端子处的电压，并响应于测量的平均电压和参考电压来调节平均电压。

公开(公告)号：US20060103462A1

公开(公告)日：2006-05-18

申请号：US10988432

申请日：2004-11-12

申请人： Peter Capofreddi ,  Derek Shaeffer ,  Sriraman Dakshinamurthy ,  Korhan Titizer

发明人： Peter Capofreddi ,  Derek Shaeffer ,  Sriraman Dakshinamurthy ,  Korhan Titizer

IPC分类号： H03F1/36

CPC分类号： H03G3/3042 ,  H03F1/0205 ,  H03F1/3247 ,  H03F1/3252 ,  H03F1/34 ,  H03F3/24 ,  H03F2200/105 ,  H03F2200/465

摘要： Circuits, methods, and systems are provided for opening a primary feedback loop in a transmitter. An auxiliary feedback loop can be closed when the primary feedback loop is opened, and a controller can match a gain of the primary feedback loop to another gain in the transmitter.

摘要翻译： 提供电路，方法和系统用于打开发射机中的主反馈环路。 当主反馈回路打开时，辅助反馈回路可以闭合，并且控制器可以将主反馈回路的增益与变送器中的另一增益相匹配。

公开(公告)号：US06946921B1

公开(公告)日：2005-09-20

申请号：US10613416

申请日：2003-07-03

申请人： Derek Shaeffer

发明人： Derek Shaeffer

IPC分类号： H03B1/00 ,  H03B5/18 ,  H03B27/00

CPC分类号： H03B5/18 ,  H03B27/00 ,  H03B2201/0208

摘要： A method and apparatus for producing high-frequency oscillations is disclosed. A new resonator architecture minimizes via losses and supports a compact layout of active circuitry. The resonator architecture incorporates dual resonant transmission lines to reduce resonator loss and facilitate compact layout. The oscillations of two oscillators are cross-coupled in a way that compensates for the delay in the active devices of the oscillator, thus permitting accurate alignment of the active circuitry response with the oscillation waveform. The cross-coupling of the two oscillators improves phase noise performance and eliminates spurious oscillations. An active circuit architecture provides very narrow pulses for the operation of the oscillator. This architecture provides for accurate cross-coupling and pulsed-mode operation to improve manufacturing stability and phase noise performance.

摘要翻译： 公开了一种用于产生高频振荡的方法和装置。 新的谐振器架构可最大限度地减少通路损耗，并支持有源电路的紧凑布局。 谐振器结构包含双谐振传输线，以减少谐振器损耗并促进紧凑布局。 两个振荡器的振荡以补偿振荡器的有源器件的延迟的方式交叉耦合，从而允许有源电路响应与振荡波形的精确对准。 两个振荡器的交叉耦合提高了相位噪声性能，并消除了杂散振荡。 有源电路架构为振荡器的操作提供非常窄的脉冲。 该架构提供精确的交叉耦合和脉冲模式操作，以提高制造稳定性和相位噪声性能。