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    • 21. 发明申请
    • METHODS AND APPARATUS FOR AN IMPROVED DISCRETE LC FILTER
    • 用于改进的离散LC滤波器的方法和设备
    • WO2005006832A2
    • 2005-01-27
    • PCT/US2004/022966
    • 2004-07-16
    • RFSTREAM CORPORATIONKAMATA, TakatsuguOKUI, Kazunori
    • KAMATA, TakatsuguOKUI, Kazunori
    • H03H7/01H03H7/12
    • H03H7/09H03F3/191H03F3/45085H03F3/45089H03F2200/111H03F2200/429H03F2203/45396H03H7/12H03H7/1758H03H7/1775H03H7/425H03H2210/012H03H2250/00H03J5/244H03J2200/10H03J2200/15
    • A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first inductor bank is selected to filter a first band of frequencies, and a second inductor bank is selected to filter a second band of frequencies. A switch circuit couples the input signal to either the first inductor bank or the second inductor bank. The switch circuit selects the first inductor bank if the first band of frequencies is selected, and selects the second inductor bank if the second band of frequencies is selected. The switch circuit electrically isolates the switching of the input signal to the first and the second inductor banks, so as to enhance the Q factor of the LC filter. Circuit and techniques are disclosed to reduce parasitic capacitance in a capacitive bank that employs MOS transistors. Furthermore, circuits and techniques are disclosed to tune a coupling factor on an inductive bank based on the frequency of the input signal.
    • 分立式电感电容(LC)滤波器在至少两个电感器组之间进行选择,以调谐LC滤波器。 滤波器接收包括一个或多个频率带的输入信号。 控制信号选择一个频带进行处理。 选择第一电感器组来滤波第一频带,选择第二电感器组来滤波第二频带。 开关电路将输入信号耦合到第一电感器组或第二电感器组。 如果第一频带被选择,则开关电路选择第一电感器组,并且如果选择第二频带则选择第二电感器组。 开关电路将输入信号的切换电隔离到第一和第二电感器组,以增强LC滤波器的Q因子。 公开了电路和技术以降低采用MOS晶体管的电容组中的寄生电容。 此外,公开了基于输入信号的频率调整电感组上的耦合因子的电路和技术。
    • 24. 发明公开
    • FILTER DEVICE AND CONTROL METHOD THEREFOR
    • FILTERVORRICHTUNG UND STEUERUNGSVERFAHRENDAFÜR
    • EP2485397A1
    • 2012-08-08
    • EP11752454.6
    • 2011-03-30
    • Asahi Kasei Microdevices Corporation
    • KAMADA, Mikio
    • H03H11/12H03H11/04
    • H03G3/3052H03H11/0472H03H2210/012H03J3/20H03J2200/15
    • There is provided a filter device having a function of adjusting the center frequency of a filter. The filter device includes: a filter core unit (102) provided with an adder (109) for outputting an added signal of an input signal and a feedback signal (signal Vf), an AGC circuit for generating an amplification signal in which the added signal is amplified, and a phase shifter (111) for generating the signal Vf by shifting a phase of the amplification signal; an amplitude comparing circuit (101) for comparing the reference amplitude and the amplitude of the signal Vf; a gain control voltage generator (108) for controlling the amplification factor of the AGC circuit (110) based upon the comparison result; a frequency comparing circuit (103) for comparing the reference frequency and the frequency of the signal Vf; a phase shifter control voltage generator (117) for controlling the shift amount of the phase in the phase shifter (111) based upon the comparison result. The gain control voltage generator (108) oscillates the filter core unit (102), while the amplification factor and the shift amount are being controlled.
    • 提供了具有调节过滤器的中心频率的功能的过滤装置。 滤波器装置包括:滤波器芯单元(102),设置有用于输出输入信号和反馈信号(信号Vf)的相加信号的加法器(109),用于产生放大信号的AGC电路,其中相加信号 以及用于通过移位放大信号的相位来产生信号Vf的移相器(111); 振幅比较电路(101),用于比较参考振幅和信号Vf的振幅; 用于根据比较结果控制AGC电路(110)的放大系数的增益控制电压发生器(108) 频率比较电路(103),用于比较参考频率和信号Vf的频率; 基于比较结果控制移相器(111)中的相位偏移量的移相器控制电压发生器(117)。 增益控制电压发生器(108)在控制放大系数和偏移量的同时振荡滤波器核心单元(102)。
    • 27. 发明申请
    • INTEGRIERTER ABSTIMMBARER SCHWINGKREIS
    • 集成可调谐谐振电路
    • WO2007131576A1
    • 2007-11-22
    • PCT/EP2007/002916
    • 2007-03-31
    • ATMEL DUISBURG GMBHEL RAI, Samir
    • EL RAI, Samir
    • H03J3/20
    • H03J3/20H03J2200/15
    • Die Erfindung betrifft einen integrierten abstimmbaren Schwingkreis zum Bereitstellen eines hochfrequenten Ausgangssignals mit einer von einem Steuersignal abhängigen Frequenz, beinhaltend einen Parallelschwingkreis mit einem ersten induktiven Element und einem Ausgang zum Bereitstellen des hochfrequenten Ausgangssignals, eine Schalteinheit mit einer gesteuerten Strecke und einem Steueranschluss zum Schalten zwischen Zuständen, wobei die Schalteinheit ausgebildet ist, in einem ersten Zustand ein vorwiegend kapazitives Verhalten und in einem zweiten Zustand ein vorwiegend resistives Verhalten aufzuweisen, wobei der Schwingkreis ausgestaltet ist, den Steueranschluss der Schalteinheit in Abhängigkeit vom Steuersignal anzusteuern. Erfindungsgemäß weist der Schwingkreis ein mit dem ersten induktiven Element transformatorisch koppelbares zweites induktives Element auf, wobei die gesteuerte Strecke parallel zum zweiten induktiven Element geschaltet ist. Die Erfindung betrifft weiterhin einen spannungsgesteuerten Oszillator und eine integrierte Schaltung.
    • 本发明涉及一种集成的可调谐的谐振电路,用于提供高频输出信号与频率依赖于控制信号的频率,包括含有一个第一电感元件和用于提供高频输出信号的输出的并联谐振电路,其具有用于状态之间进行切换的控制路径和控制端子的开关单元 其中所述切换单元在第一状态下配置显电容行为,并且具有在第二状态,其中,所述谐振电路被设计来驱动开关单元的控制终端响应于所述控制信号的主要电阻行为。 根据本发明的具有一个电感元件,以所述第一变压器的谐振电路可耦合到第二电感元件,其特征在于,所述受控路径并联连接与所述第二感应元件。 本发明还涉及一个压控振荡器和集成电路。
    • 28. 发明申请
    • METHODS AND APPARATUS FOR AN IMPROVED DISCRETE LC FILTER
    • 改进的离散LC滤波器的方法和装置
    • WO2005006832A3
    • 2005-06-16
    • PCT/US2004022966
    • 2004-07-16
    • RFSTREAM CORPKAMATA TAKATSUGUOKUI KAZUNORI
    • KAMATA TAKATSUGUOKUI KAZUNORI
    • H03H7/01H03H7/12
    • H03H7/09H03F3/191H03F3/45085H03F3/45089H03F2200/111H03F2200/429H03F2203/45396H03H7/12H03H7/1758H03H7/1775H03H7/425H03H2210/012H03H2250/00H03J5/244H03J2200/10H03J2200/15
    • A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first inductor bank is selected to filter a first band of frequencies, and a second inductor bank is selected to filter a second band of frequencies. A switch circuit couples the input signal to either the first inductor bank or the second inductor bank. The switch circuit selects the first inductor bank if the first band of frequencies is selected, and selects the second inductor bank if the second band of frequencies is selected. The switch circuit electrically isolates the switching of the input signal to the first and the second inductor banks, so as to enhance the Q factor of the LC filter. Circuit and techniques are disclosed to reduce parasitic capacitance in a capacitive bank that employs MOS transistors. Furthermore, circuits and techniques are disclosed to tune a coupling factor on an inductive bank based on the frequency of the input signal.
    • 离散电感电容(LC)滤波器在至少两个电感器组之间选择以调谐LC滤波器。 滤波器接收包括一个或多个频带的输入信号。 控制信号选择用于处理的频带。 选择第一电感器组以对第一频带进行滤波,并且选择第二电感器组以对第二频带进行滤波。 开关电路将输入信号耦合到第一电感器组或第二电感器组。 如果选择了第一频带,则开关电路选择第一电感器组,并且如果选择了第二频带,则选择第二电感器组。 开关电路将输入信号的开关电隔离到第一和第二电感器组,以便增强LC滤波器的Q因子。 公开了电路和技术来减少使用MOS晶体管的电容库中的寄生电容。 此外,公开了电路和技术,以基于输入信号的频率调谐感应组上的耦合因子。