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259 条记录 (耗时 0.019 秒)

    Oscillator
    49.
    发明授权
    Oscillator 有权

    公开(公告)号：US11581880B2

    公开(公告)日：2023-02-14

    申请号：US17524306

    申请日：2021-11-11

    申请人： STMicroelectronics (Rousset) SAS

    发明人： Vincent Binet ,  Michel Cuenca ,  Ludovic Girardeau

    IPC分类号： H03K4/50 ,  H03K5/24

    摘要： Series of first ramps and second ramps are generated. A circuit delivers a first signal representative of the comparison of each first ramp with a set point and delivers a second signal representative of the comparison of each second ramp with the set point. Based on the first and second signals: a first ramp is stopped and a second ramp is started when the first ramp reaches the set point, and a second ramp is stopped and a first ramp is started when the second ramp reaches the set point. The value of the set point is modulated in response a maximum value of the first/second last ramp compared with the set point.

    Combining voltage ramps to create linear voltage ramp
    50.
    发明授权
    Combining voltage ramps to create linear voltage ramp 有权

    公开(公告)号：US11496121B2

    公开(公告)日：2022-11-08

    申请号：US17248873

    申请日：2021-02-11

    申请人： Silanna Asia Pte Ltd

    发明人： Joseph H. Colles ,  Steven E. Rosenbaum

    IPC分类号： H03K4/50 ,  H03K7/08

    摘要： An improved ramp generator enables a very high degree of linearity in an output voltage ramp signal. Output ramps of the output voltage ramp signal are alternatingly produced from two preliminary ramp signals during alternating time periods. Preliminary ramps are produced at different preliminary ramp nodes that are alternatingly connected to an output node. The preliminary ramps continuously ramp during and in some cases beyond, e.g., before and/or after, the time periods. In some embodiments, switches alternatingly connect two capacitors to at least one current source, a reset voltage source, and the output node to alternatingly produce the preliminary ramps.