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    Method and apparatus for digitally controlling the capacitance of an integrated circuit device using mos-field effect transistors
    62.
    发明授权
    Method and apparatus for digitally controlling the capacitance of an integrated circuit device using mos-field effect transistors 有权
    使用mos场效应晶体管数字控制集成电路器件的电容的方法和装置

    公开(公告)号：US06211745B1

    公开(公告)日：2001-04-03

    申请号：US09304443

    申请日：1999-05-03

    Applicant: Lars Henrik Mucke ,  Christopher Dennis Hull ,  Lars Gustaf Jansson

    Inventor： Lars Henrik Mucke ,  Christopher Dennis Hull ,  Lars Gustaf Jansson

    IPC: H01L2993

    CPC classification number: H03F3/45085 ,  H01L27/0805 ,  H03B5/1215 ,  H03B5/1231 ,  H03B5/124 ,  H03B5/1265 ,  H03B2201/0266 ,  H03B2201/0283 ,  H03F1/56 ,  H03F2203/45631 ,  H03F2203/45638 ,  H03J2200/10 ,  H03L7/099 ,  H03L7/10 ,  H03L7/18

    Abstract: A method and apparatus for digitally controlling the capacitance of an integrated circuit device using MOS-FET devices. In accordance with one aspect of the present invention, a one-bit or “binary” varactor is presented wherein the gate-to-bulk capacitance of the MOS-FET device exhibits dependency to a D.C. voltage applied between its gate and well implant regions. The capacitance-voltage characteristic of the binary capacitor has three major regions: (1) a first relatively flat region having little or no voltage dependency and having a capacitance equal to a first low capacitance of C1; (2) a sloped region wherein a voltage dependency exists; and (3) a second relatively flat region where there is little or no voltage dependency and where the capacitance equals a second higher capacitance of C2. The capacitance of the binary capacitor can be changed from C1 to C2 simply by changing the polarity of the applied D.C. voltage from a positive to a negative value. A plurality of binary capacitors are configured in a parallel arrangement to produce a digitally controlled capacitor. The digitally controlled capacitor can be used in any integrated circuit requiring a tightly controlled tuned network. One application is a voltage-controlled oscillator (VCO) wherein the center output frequency of the VCO is calibrated by digitally modifying the capacitance of the VCO's digitally controlled capacitor. A means for determining whether the VCO requires calibration and a means for calibrating the center output frequency of the VCO is presented.

    Abstract translation: 一种使用MOS-FET器件数字控制集成电路器件的电容的方法和装置。 根据本发明的一个方面，提出了一种一位或“二进制”变容二极管，其中MOS-FET器件的栅极 - 体积电容表现出对其栅极和阱注入区域之间施加的直流电压的依赖性。 二元电容器的电容电压特性具有三个主要区域：（1）具有很小或没有电压依赖性并具有等于C1的第一低电容的电容的第一相对平坦的区域; （2）存在电压依赖性的倾斜区域; 和（3）几乎没有或没有电压依赖性并且电容等于C2的第二较高电容的第二相对平坦的区域。 通过将所施加的直流电压的极性从正值改变为负值，可以将二进制电容器的电容从C1改变为C2。 多个二进制电容器被配置成并联布置以产生数字控制的电容器。 数字控制电容器可用于需要严格控制的调谐网络的任何集成电路中。 一种应用是压控振荡器（VCO），其中VCO的中心输出频率通过数字修改VCO的数字控制电容器的电容来校准。 提出了一种用于确定VCO是否需要校准的装置，以及用于校准VCO的中心输出频率的装置。

    Method of initializing an oscillator circuit
    63.
    发明授权
    Method of initializing an oscillator circuit 有权
    初始化振荡电路的方法

    公开(公告)号：US06188290B1

    公开(公告)日：2001-02-13

    申请号：US09303578

    申请日：1999-05-03

    Applicant: John W. Fallisgaard ,  Eugene S. Trefethen

    Inventor： John W. Fallisgaard ,  Eugene S. Trefethen

    IPC: H03L706

    CPC classification number: H03L7/183 ,  H03B5/366 ,  H03B19/00 ,  H03B2201/0266 ,  H03J2200/10 ,  H03L7/0898

    Abstract: A programmable crystal oscillator is provided having a memory for storing frequency-defining parameters. Typically, one of these parameters is used to program an adjustable capacitive load circuit coupled to a crystal to thereby adjust the crystal source frequency. Additional parameters are used to program the output frequency of a phase locked loop circuit coupled to receive the adjusted source frequency. A further parameter can also be used to divide the output frequency of the phase locked loop circuit to supply a specified output frequency. The oscillators can be manufactured as generic programmable crystal oscillators without regard for output frequency and then quickly programmed to produce customer-specified output frequencies with a high degree of accuracy.

    Abstract translation: 提供了一种可编程晶体振荡器，其具有用于存储频率定义参数的存储器。 通常，这些参数之一用于对耦合到晶体的可调容性负载电路进行编程，从而调节晶体源频率。 附加参数用于编程耦合以接收经调整的源频率的锁相环电路的输出频率。 还可以使用另外的参数来分频锁相环电路的输出频率以提供指定的输出频率。 振荡器可以制造为通用可编程晶体振荡器，而不考虑输出频率，然后快速编程，以高精度产生客户指定的输出频率。

    Adjustable frequency stabilizing internal chip capacitor system
    64.
    发明授权
    Adjustable frequency stabilizing internal chip capacitor system 失效
    可调节频率稳定内部片式电容器系统

    公开(公告)号：US6058294A

    公开(公告)日：2000-05-02

    申请号：US47779

    申请日：1998-03-24

    Applicant: Frederick J. Bruwer ,  Willem Smit

    Inventor： Frederick J. Bruwer ,  Willem Smit

    IPC: H03B5/08 ,  H03B1/00 ,  H03B5/20 ,  H04B1/04 ,  H04B1/02 ,  H04R1/02

    CPC classification number: H03B5/20 ,  H03B2201/02 ,  H03B2201/025 ,  H03B2201/0266 ,  H03J2200/10 ,  Y10T307/826

    Abstract: A transmitter system having an adjustable monolithic frequency stabilization and tuning internal capacitor circuit. The transmitter system has a transmitter for generating and transmitting a transmitter oscillator frequency signal. A data generating chip is coupled to the transmitter. The data generating chip is used for adjusting and controlling the transmitter oscillator frequency signal. A variable capacitor circuit is located internal to the data generating chip and is coupled to a ground pin and one of a plurality of function pins on the data generating chip. The variable capacitor circuit is used for adjusting and setting the centerpoint of the transmitter oscillator frequency signal.

    Abstract translation: 一种具有可调单片稳频和调谐内部电容电路的发射机系统。 发射机系统具有用于生成和发送发射机振荡器频率信号的发射机。 数据产生芯片耦合到发射机。 数据生成芯片用于调整和控制发射机振荡器频率信号。 可变电容器电路位于数据产生芯片的内部，并且耦合到数据生成芯片上的接地引脚和多个功能引脚中的一个。 可变电容电路用于调整和设置发射机振荡器频率信号的中心点。

    Circuit device including RF converter, tuner and if amplifier
    65.
    发明授权
    Circuit device including RF converter, tuner and if amplifier 失效
    电路设备包括RF转换器，调谐器和放大器

    公开(公告)号：US5815218A

    公开(公告)日：1998-09-29

    申请号：US582625

    申请日：1996-01-04

    Applicant: Osamu Maeda

    Inventor： Osamu Maeda

    IPC: H03B1/00 ,  H03J5/24 ,  H04N5/00 ,  H04N5/40 ,  H04N5/44 ,  H04N5/50 ,  H04N5/775

    CPC classification number: H04N5/50 ,  H03J5/246 ,  H03B2201/0266

    Abstract: A circuit device provided in a video signal processing apparatus. The circuit device includes a tuner for tuning a television signal, an IF amplifier for demodulating the television signal, and an RF converter having an RF oscillator for modulating video and audio signals into a television signal in a VHF band. The tuner, IF amplifier and RF converter are accommodated in a shield case. Further, the circuit device includes a circuit including a resonance circuit having a coil and a capacitor for controlling an oscillation frequency of the RF oscillator and a switch for switching a parameter of the resonance circuit to vary the oscillation frequency.

    Abstract translation: 一种设置在视频信号处理装置中的电路装置。 电路装置包括用于调谐电视信号的调谐器，用于解调电视信号的IF放大器，以及具有用于将视频和音频信号调制成VHF频带的电视信号的RF振荡器的RF转换器。 调谐器，IF放大器和RF转换器容纳在屏蔽盒中。 此外，电路装置包括电路，其包括具有用于控制RF振荡器的振荡频率的线圈和电容器的谐振电路和用于切换谐振电路的参数以改变振荡频率的开关。

    Closed-loop frequency control of an oscillator circuit
    66.
    发明授权
    Closed-loop frequency control of an oscillator circuit 失效
    振荡电路的闭环频率控制

    公开(公告)号：US5528199A

    公开(公告)日：1996-06-18

    申请号：US367401

    申请日：1994-12-30

    Applicant: Alfred E. Dunlop ,  Wilhelm C. Fischer ,  Thaddeus J. Gabara

    Inventor： Alfred E. Dunlop ,  Wilhelm C. Fischer ,  Thaddeus J. Gabara

    IPC: H03L7/00 ,  H03B1/00 ,  H03B5/12 ,  H03L7/099

    CPC classification number: H03L7/099 ,  H03B2201/0266

    Abstract: The output frequency of a simple low-power-dissipation oscillator circuit designed to drive PPS CMOS circuits is controlled by a closed-loop system. In response to deviations of the output frequency from a prescribed value, the system generates correction signals that are applied to an array of capacitors. In that way, capacitance is electrically added to or subtracted from a series-resonant path of the oscillator circuit, thereby to automatically establish and maintain the output frequency of the circuit at or near its prescribed value.

    Abstract translation: 设计用于驱动PPS CMOS电路的简单低功耗振荡器电路的输出频率由闭环系统控制。 响应于输出频率与规定值的偏差，系统产生施加到电容器阵列的校正信号。 以这种方式，电容被加到或从振荡器电路的串联谐振路径中减去，从而自动建立并保持电路的输出频率处于或接近其规定值。

    Circuit device and oscillator
    67.
    发明授权
    Circuit device and oscillator 有权

    公开(公告)号：US12119790B2

    公开(公告)日：2024-10-15

    申请号：US17986931

    申请日：2022-11-15

    Applicant: SEIKO EPSON CORPORATION

    Inventor： Yosuke Itasaka

    IPC: H03B5/36 ,  H03B5/04

    CPC classification number: H03B5/364 ,  H03B5/04 ,  H03B2200/004 ,  H03B2201/0266

    Abstract: A circuit device includes an oscillation circuit. The oscillation circuit includes a first variable capacitance circuit whose capacitance change characteristic with respect to a capacitance control voltage is a positive characteristic and a second variable capacitance circuit whose capacitance change characteristic with respect to the capacitance control voltage is a negative characteristic, and oscillates a resonator. The circuit device further includes a switch circuit. The switch circuit receives a first input voltage at a first input terminal thereof, receives a second input voltage at a second input terminal thereof, outputs a first output voltage selected from a plurality of voltages including the first input voltage and the second input voltage to a first output terminal thereof to which the first variable capacitance circuit is electrically coupled, and outputs a second output voltage selected from the plurality of voltages to a second output terminal thereof to which the second variable capacitance circuit is electrically coupled.

    Circuit Device And Oscillator
    69.
    发明公开
    Circuit Device And Oscillator 审中-公开

    公开(公告)号：US20230155551A1

    公开(公告)日：2023-05-18

    申请号：US17986931

    申请日：2022-11-15

    Applicant: SEIKO EPSON CORPORATION

    Inventor： Yosuke ITASAKA

    IPC: H03B5/36 ,  H03B5/04

    CPC classification number: H03B5/364 ,  H03B5/04 ,  H03B2200/004 ,  H03B2201/0266

    Abstract: A circuit device includes an oscillation circuit. The oscillation circuit includes a first variable capacitance circuit whose capacitance change characteristic with respect to a capacitance control voltage is a positive characteristic and a second variable capacitance circuit whose capacitance change characteristic with respect to the capacitance control voltage is a negative characteristic, and oscillates a resonator. The circuit device further includes a switch circuit. The switch circuit receives a first input voltage at a first input terminal thereof, receives a second input voltage at a second input terminal thereof, outputs a first output voltage selected from a plurality of voltages including the first input voltage and the second input voltage to a first output terminal thereof to which the first variable capacitance circuit is electrically coupled, and outputs a second output voltage selected from the plurality of voltages to a second output terminal thereof to which the second variable capacitance circuit is electrically coupled.

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