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    • 5. 发明授权
    • Power amplifier and radio communication apparatus using the same
    • 功率放大器和使用其的无线电通信装置
    • US06771130B2
    • 2004-08-03
    • US09947446
    • 2001-09-07
    • Takao HasegawaKeiichi Sakuno
    • Takao HasegawaKeiichi Sakuno
    • H03F304
    • H03F1/3276H03F1/302H03F1/56
    • A power amplifier has a front and a rear stage. In the rear stage, to a base of a signal-amplifying bipolar transistor is connected one end of a variable impedance element whose impedance changes according to an input power level. An adjusting circuit is connected between the other end of the variable impedance element and a ground. A DC current adjusting element is connected between the other end of the variable impedance element and a supply voltage terminal. The front stage is made to perform class A operation or class AB operation near class A operation, while the rear stage is made to perform class B operation or class AB operation near class B operation. The distortion characteristic of the rear stage is adjusted by the variable impedance element, the adjusting circuit, and the DC current adjusting element so as to offset the distortion characteristic of the front stage.
    • 功率放大器具有前级和后级。 在后级,将信号放大双极晶体管的基极连接到可变阻抗元件的一端,其阻抗根据输入功率电平而变化。 调节电路连接在可变阻抗元件的另一端和地之间。 直流电流调节元件连接在可变阻抗元件的另一端和电源电压端子之间。 前级用于在A类操作附近执行A类操作或AB类操作,而后级在B类操作附近进行B类操作或AB类操作。 通过可变阻抗元件,调节电路和直流电流调节元件调整后级的失真特性,以抵消前级的失真特性。
    • 10. 发明授权
    • Paper-processing and punching apparatus
    • 纸加工冲孔机
    • US08231321B2
    • 2012-07-31
    • US11996363
    • 2006-07-25
    • Takao HasegawaNaoki KojimaAtsushi Kurabayashi
    • Takao HasegawaNaoki KojimaAtsushi Kurabayashi
    • B42B5/08
    • B65H35/00B26D5/02B26D5/08B26D5/10B26D5/12B26D7/015B26F1/0092B26F1/02B26F1/24B65H29/58B65H2301/33312B65H2301/5152
    • A paper-processing apparatus is provided with a paper-transferring section containing a transfer path for transferring a sheet of paper to a prescribed position and a transfer path to which the transfer route is switchable from the transfer path, a punch-processing section for punching two or more holes for binding in one end of the sheet of paper transferred thereto, and a control section for controlling the paper-transferring section and the punch-processing section wherein the control section controls the paper-transferring section to decelerate and stop the transfer of the sheet of paper at the prescribed position of the transfer path, to switch the transfer route for the sheet of paper from the transfer path to the transfer path, and to deliver the sheet of paper in a reverse direction thereof. The sheet of paper can be transferred to the punch-processing section with the sheet-shaped figure of the sheet of paper kept as it is, and the holes for binding can be punched at one end of the sheet of paper.
    • 纸张处理设备设置有纸张传送部分,该纸张传送部分包含用于将纸张传送到指定位置的传送路径和传送路线可从传送路径切换到的传送路径;冲压加工部分 两个或更多个用于在传送到其上的纸张的一端中装订的孔;以及控制部分,用于控制纸张传送部分和打孔处理部分,其中控制部分控制纸张传送部分减速并停止转印 将纸张从传送路径切换到传送路径,并将纸张沿相反方向传送。 纸张可以被转印到冲压加工部分,纸张的片状图像保持原样,并且用于装订的孔可以在纸张的一端打孔。