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    High-frequency oscillator
    246.
    发明专利
    High-frequency oscillator 审中-公开
    高频振荡器

    公开(公告)号：JP2005057725A

    公开(公告)日：2005-03-03

    申请号：JP2004053097

    申请日：2004-02-27

    Applicant: Murata Mfg Co Ltd ,  株式会社村田製作所

    Inventor： KAWAGISHI MAKOTO ,  AKAGI HIDEMORI ,  IZUMI TOMOE ,  TAGO MASANARI

    IPC: H03B5/02 ,  H03B5/12

    CPC classification number: H03B5/1203 ,  H03B5/1231 ,  H03B2200/0048 ,  H03B2201/0266

    Abstract: PROBLEM TO BE SOLVED: To provide a frequency-selective high-frequency oscillator that stably operates and outputs a stable high-frequency signal regardless of which of two different frequencies is selected.
    SOLUTION: The frequency-selective high-frequency oscillator comprises a first switching circuit 2a that controls the operation of a first amplifying circuit 3a, and a second switching circuit 2b that controls the operation of the first switching circuit 2a and a second amplifying circuit 3b. Switching control signals are inputted to the second switching circuit 2b. When the switching control signal is "Low", the second switching circuit 2b is turned into an ON state and the second amplifying circuit 3b only operates, thereby outputting a high frequency signal with a resonant frequency according to a second resonant circuit 1b. On the other hand, when the switching control signal is "High", the second switching circuit 2b is turned into an OFF state and the first switching circuit 2a is turned into an ON state, which causes the first amplifying circuit 3a only to operate. Thus, a high frequency signal with a resonant frequency according to a first resonant circuit 1a is outputted.
    COPYRIGHT: (C)2005,JPO&NCIPI

    Abstract translation: 要解决的问题：提供一种频率选择性高频振荡器，其稳定地操作并输出稳定的高频信号，而不管选择两种不同的频率。 解决方案：频率选择性高频振荡器包括控制第一放大电路3a的操作的第一开关电路2a和控制第一开关电路2a的操作的第二开关电路2b和第二放大 电路3b。 开关控制信号被输入到第二开关电路2b。 当开关控制信号为“低”时，第二开关电路2b变为导通状态，第二放大电路3b仅工作，从而根据第二谐振电路1b输出具有谐振频率的高频信号。 另一方面，当切换控制信号为“高”时，第二切换电路2b变为断开状态，第一开关电路2a变为导通状态，仅使第一放大电路3a工作。 因此，输出具有根据第一谐振电路1a的谐振频率的高频信号。 版权所有（C）2005，JPO＆NCIPI

    Circuit device and oscillator
    248.
    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
    250.
    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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