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    • 21. 发明授权
    • Local oscillator
    • 本地振荡器
    • US08638172B2
    • 2014-01-28
    • US13230041
    • 2011-09-12
    • Yoshinori SuzukiHiroyuki KobayashiJun Deguchi
    • Yoshinori SuzukiHiroyuki KobayashiJun Deguchi
    • H03L7/099
    • H03L7/18H03L2207/50
    • A local oscillator of an embodiment includes a digitally-controlled oscillator, a phase data generator, a subtractor, a loop filter, a multiplier, and a coefficient calculator. The digitally-controlled oscillator variably controls an oscillation frequency of an oscillation signal by using a first oscillator control value. The oscillation frequency is equal to a product of the first oscillator control value multiplied by an amount of change in the oscillation frequency per unit first oscillator control value. Set frequency data is calculated by dividing a set frequency by a reference frequency of a reference signal. The multiplier outputs the first oscillator control value obtained by multiplying a normalized control value from the loop filter by a first coefficient. The coefficient calculator divides, by the set frequency data, the first oscillator control value which makes the oscillation frequency roughly equal to the set frequency, and sets the quotient as a new first coefficient in the multiplier.
    • 实施例的本地振荡器包括数字控制振荡器,相位数据发生器,减法器,环路滤波器,乘法器和系数计算器。 数字控制振荡器通过使用第一振荡器控制值来可变地控制振荡信号的振荡频率。 振荡频率等于第一振荡器控制值乘以每单位第一振荡器控制值的振荡频率的变化量的乘积。 通过将设定频率除以参考信号的参考频率来计算设定频率数据。 乘法器输出通过将来自环路滤波器的归一化控制值乘以第一系数而获得的第一振荡器控制值。 系数计算器通过设定频率数据将使振荡频率大致等于设定频率的第一振荡器控制值分频,并将乘数设置为乘法器中的新的第一系数。
    • 29. 发明申请
    • SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE
    • 半导体集成电路设备
    • US20100109781A1
    • 2010-05-06
    • US12560828
    • 2009-09-16
    • Jun DEGUCHIDaisuke Miyashita
    • Jun DEGUCHIDaisuke Miyashita
    • H03F3/04
    • H03F3/45183H03F1/30H03F3/45632H03F2200/453H03F2203/45244H03F2203/45508
    • A semiconductor integrated circuit device includes: an amplifier circuit which respectively has one or more input terminals and one or more output terminals; a replica circuit which has the same DC characteristics as those of the amplifier circuit; a reference voltage generation circuit which is connected to a bias terminal of the replica circuit, and which generates a predetermined reference voltage at the bias terminal; and a feedback circuit which takes a difference between the reference voltage generated at the bias terminal of the replica circuit and the voltage generated at a bias terminal of the amplifier circuit, and which performs feedback control by providing negative feedback of the difference to the bias terminal of the amplifier circuit so that the voltage generated at the bias terminal of the amplifier circuit is made equal to the reference voltage generated at the bias terminal of the replica circuit.
    • 一种半导体集成电路器件,包括:分别具有一个或多个输入端子和一个或多个输出端子的放大器电路; 具有与放大电路相同的DC特性的复制电路; 参考电压产生电路,其连接到所述复制电路的偏置端子,并且在所述偏置端子处产生预定的参考电压; 以及反馈电路,其将复制电路的偏置端子处产生的参考电压与在放大器电路的偏置端子处产生的电压之间产生差异,并且通过向偏置端子提供差分的负反馈来执行反馈控制 使得在放大器电路的偏置端产生的电压等于在复制电路的偏置端产生的参考电压。
    • 30. 发明授权
    • Radio communication device, transmission circuit and buffer circuit
    • 无线电通信设备,传输电路和缓冲电路
    • US08781410B2
    • 2014-07-15
    • US13237069
    • 2011-09-20
    • Jun Deguchi
    • Jun Deguchi
    • H03L5/00H04B1/40H04B1/02
    • H04B1/403H03F3/24H04B1/04H04B1/40H04B2001/0408H04W52/029Y02D70/142Y02D70/40
    • According to one embodiment, a buffer circuit has a capacitor comprising a first terminal and a second terminal, an input signal being inputted to the first terminal, a first inverting amplifier circuit configured to invert and amplify a signal of the second terminal of the capacitor, a second inverting amplifier circuit configure to invert and amplify an output signal of the first inverting amplifier circuit, and a MOS (Metal Oxide Semiconductor) transistor comprising a third terminal, a fourth terminal and a gate, the third terminal being connected to the second terminal of the capacitor, the fourth terminal being connected to a connection node of the first and the second inverting amplifier circuits, an inversion signal of the input signal being inputted to the gate.
    • 根据一个实施例,缓冲电路具有包括第一端子和第二端子的电容器,输入信号被输入到第一端子,第一反相放大器电路被配置为反相和放大电容器的第二端子的信号, 第二反相放大器电路,被配置为反转和放大第一反相放大器电路的输出信号;以及MOS(金属氧化物半导体)晶体管,包括第三端子,第四端子和栅极,第三端子连接到第二端子 电容器的第四端子连接到第一和第二反相放大器电路的连接节点,输入信号的反相信号被输入到门。