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    • 8. 发明授权
    • Receiver having no tracking error
    • 接收器没有跟踪误差
    • US07355490B2
    • 2008-04-08
    • US11389427
    • 2006-03-23
    • Masahiko Ota
    • Masahiko Ota
    • H03B5/18H04B1/06
    • H03J3/08H03J1/0091H03J2200/10H04N5/50Y10S331/02
    • A receiver includes an up/down counter that controls turning on/off of individual switching units, and a count signal generator that compares a control voltage with a first reference voltage and a second reference voltage lower than the first reference voltage and outputs a count signal to the up/down counter. The count signal generator outputs a down count signal when the control voltage is higher than the first reference voltage, outputs an up count signal when the control voltage is lower than the second reference voltage, and stops the output of the up count signal and the down count signal and outputs a lock signal when the control voltage is between the first reference voltage and the second reference voltage. By the lock signal, a flow of a current in oscillating active elements stops.
    • 接收机包括控制各个开关单元的接通/断开的上/下计数器以及将控制电压与第一参考电压和低于第一参考电压的第二参考电压进行比较的计数信号发生器,并输出计数信号 到上/下计数器。 当控制电压高于第一参考电压时,计数信号发生器输出递减计数信号,当控制电压低于第二参考电压时输出上升计数信号,并停止向上计数信号的输出和下降 当控制电压在第一参考电压和第二参考电压之间时,输出锁定信号。 通过锁定信号,振荡有源元件中的电流流动停止。
    • 9. 发明申请
    • Variable gain amplifier capable of functioning at low power supply voltage
    • 能够在低电源电压下工作的可变增益放大器
    • US20050083125A1
    • 2005-04-21
    • US10964460
    • 2004-10-12
    • Masahiko Ota
    • Masahiko Ota
    • H03G3/10H03F3/45
    • H03F3/45183H03F2200/513H03F2203/45466H03F2203/45638H03F2203/45641
    • A variable gain amplifier contains first and second amplifying elements for signal amplification, which are differentially connected to a first constant current source. Third and fourth amplifying elements for gain control are differentially connected to a signal input terminal connected to a second constant current source. Fifth and sixth amplifying elements for gain control are differentially connected to a signal input terminal connected to a third constant current source. In addition, an output terminal of the first amplifying element is connected to the second constant current source and an output terminal of the second amplifying element is connected to the third constant current source. The first constant current source is connected to a high potential terminal of a power source and the second and third constant current sources are connected to a low potential terminal of the power source.
    • 可变增益放大器包含用于信号放大的第一和第二放大元件,它们差分地连接到第一恒定电流源。 用于增益控制的第三和第四放大元件差分连接到连接到第二恒定电流源的信号输入端子。 用于增益控制的第五和第六放大元件差分连接到连接到第三恒流源的信号输入端。 此外,第一放大元件的输出端连接到第二恒流源,第二放大元件的输出端连接到第三恒流源。 第一恒流源连接到电源的高电位端,第二和第三恒流源连接到电源的低电位端。