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    • 51. 发明申请
    • Transmitter and communication apparatus
    • 发射机和通信设备
    • US20090098839A1
    • 2009-04-16
    • US11907380
    • 2007-10-11
    • Yoshihiro HaraShigeru Morimoto
    • Yoshihiro HaraShigeru Morimoto
    • H03C1/62
    • H03C1/62
    • A modulator 23 corrects an amplitude signal Rd by adding thereto an offset value α and generates, based on the corrected amplitude signal Rd, an amplitude signal Ra for amplitude-modulating a radio-frequency signal. The modulator 23 includes: an offset voltage measurement section 109 operable to measure an offset voltage V2cal of the amplitude signal Ra; a correction value calculation section 110 operable to obtain a difference value ΔV2cal between the offset voltage V2cal measured by the offset voltage measurement section 109 and an initial value of the offset voltage V2cal and operable to calculate, based on the difference value ΔV2cal, a correction value VODAC for correcting the offset voltage V2cal; and an addition section 106 operable to add the correction value VODAC calculated by the correction value calculation section 110 to a signal processed until the amplitude signal Ra is generated from the amplitude signal Rd.
    • 调制器23通过将偏移值α加上来校正振幅信号Rd,并且基于校正的振幅信号Rd生成用于对射频信号进行幅度调制的振幅信号R. 调制器23包括:偏移电压测量部109,用于测量振幅信号Ra的偏移电压V2cal; 校正值计算部分110,用于获得由偏移电压测量部分109测量的偏移电压V2cal与偏移电压V2cal的初始值之间的差值DeltaV2cal,并且可操作以基于差值ΔV2cal计算校正值 VODAC用于校正偏移电压V2cal; 以及附加部分106,其可操作以将由校正值计算部分110计算出的校正值VODAC与从振幅信号Rd产生振幅信号Ra之前的处理信号相加。
    • 55. 发明申请
    • Driving device and driving system
    • 驱动装置和驱动系统
    • US20070030318A1
    • 2007-02-08
    • US11493227
    • 2006-07-26
    • Junji SatoJunichi TaniiYoshihiro HaraAkira Kosaka
    • Junji SatoJunichi TaniiYoshihiro HaraAkira Kosaka
    • B41J2/045
    • H02N2/067H02N2/025
    • Drive technology is provided which makes suitable low velocity driving and smooth changing of driving velocity possible and achieves reduced power consumption. In the driving device, the drive unit is driven which engages with drive shaft which moves back and forth in tandem with extension and contraction of the piezoelectric element. In this driving device, when the output cycle for cycle Te is repeated such that the voltages applied to the piezoelectric element 11 are the maximum value (+Vp), the minimum value (−Vp), and the middle value (0V), the movement velocity of the drive unit 13 can be changed by thinning the output cycle at cycle Tf. As a result, suitable low velocity driving can be carried out and power consumption can be reduced in the drive unit.
    • 提供驱动技术,使得适当的低速驱动和驱动速度的平滑变化成为可能,并实现降低的功耗。 在驱动装置中,驱动单元与驱动轴啮合,该驱动轴与压电元件的伸缩一起前后移动。 在该驱动装置中,当重复循环Te的输出周期,使得施加到压电元件11的电压为最大值(+ Vp)时,最小值(-Vp)和中间值(0V), 驱动单元13的移动速度可以通过在周期Tf变薄输出周期来改变。 结果,可以实现合适的低速驱动,并且可以在驱动单元中降低功耗。