公开(公告)号：US20060234668A1

公开(公告)日：2006-10-19

申请号：US11393704

申请日：2006-03-31

申请人： Takeshi Uchitomi ,  Takao Okazaki ,  Sakae Chida ,  Yasuo Shima ,  Gary Smith

发明人： Takeshi Uchitomi ,  Takao Okazaki ,  Sakae Chida ,  Yasuo Shima ,  Gary Smith

IPC分类号： H04B1/06 ,  H04B1/28 ,  H04B7/00

CPC分类号： H04L27/3818 ,  H03H11/1291

摘要： The communication semiconductor integrated circuit includes serial-signal processing circuits having low-pass filters and variable gain amplifier circuits cascade-connected in series. The low-pass filters constituting the serial-signal processing circuit each include a variable capacitance circuit composed of capacitance elements and switching elements connected in series to the capacitance elements, respectively, and capable of selecting the capacitance elements to change capacitance of the low-pass filter. A reference clock signal is supplied to the circuit containing the low-pass filters upon turning on of a power supply, for example, to determine a deviation of a delay time in the circuit to a design value and on and off states of the switching elements of the variable capacitance circuit are set so that the deviation of the delay time is minimized.

摘要翻译： 通信半导体集成电路包括具有低通滤波器的串行信号处理电路和串联级联的可变增益放大器电路。 构成串行信号处理电路的低通滤波器各自包括由电容元件和与电容元件串联连接的开关元件组成的可变电容电路，并且能够选择电容元件来改变低通电容 过滤。 例如，在电源接通时，将参考时钟信号提供给包含低通滤波器的电路，以确定电路中的延迟时间与设计值的偏差以及开关元件的导通和截止状态 设定为可变电容电路，使得延迟时间的偏差最小化。

公开(公告)号：US08238839B2

公开(公告)日：2012-08-07

申请号：US12732393

申请日：2010-03-26

申请人： Norio Hayashi ,  Satoshi Arayashiki ,  Takeshi Uchitomi ,  Tomomitsu Kitamura

发明人： Norio Hayashi ,  Satoshi Arayashiki ,  Takeshi Uchitomi ,  Tomomitsu Kitamura

IPC分类号： H04B1/40

CPC分类号： H03G3/3068 ,  H03G3/3078 ,  H04B1/525

摘要： Variable operating currents are generated in relation to input signal power and output signal power and achieving both low noise and low power consumption. Emitter follower circuits are attached to output terminals of a frequency divider for generating a local signal. By adjusting the currents flowing through the emitter follower circuits, the amounts of currents flowing into mixers is adjusted. When the amounts of currents of local signals flowing into the mixers increases, the effect of noise suppression is expected. The amounts of the currents flowing through the emitter follower circuits is changed depending on the amplification factor of variable amplifiers.

摘要翻译： 相对于输入信号功率和输出信号功率产生可变工作电流，并实现低噪声和低功耗。 发射器跟随器电路连接到分频器的输出端，用于产生本地信号。 通过调节流过射极跟随器电路的电流，调节流入混频器的电流量。 当流入混频器的本地信号的电流量增加时，预期噪声抑制的影响。 流过射极跟随器电路的电流量根据可变放大器的放大系数而改变。

公开(公告)号：US20100297956A1

公开(公告)日：2010-11-25

申请号：US12732393

申请日：2010-03-26

申请人： Norio HAYASHI ,  Satoshi ARAYASHIKI ,  Takeshi UCHITOMI ,  Tomomitsu KITAMURA

发明人： Norio HAYASHI ,  Satoshi ARAYASHIKI ,  Takeshi UCHITOMI ,  Tomomitsu KITAMURA

IPC分类号： H04B1/40 ,  H04B1/06

CPC分类号： H03G3/3068 ,  H03G3/3078 ,  H04B1/525

摘要： The invention provides a control method for generating variable operating currents in relation to input signal power and output signal power and achieving both low noise and low power consumption. Emitter follower circuits are attached to output terminals of a frequency divider for generating a local signal. By adjusting the currents flowing through the emitter follower circuits, the amount of currents flowing into mixers is adjusted. When the amount of currents of local signals flowing into the mixers increases, the effect of noise suppression is expected. The amount of the currents flowing through the emitter follower circuits is changed depending on the amplification factor of variable amplifiers.

摘要翻译： 本发明提供了一种用于产生与输入信号功率和输出信号功率相关的可变工作电流并实现低噪声和低功耗的控制方法。 发射器跟随器电路连接到分频器的输出端，用于产生本地信号。 通过调节流经射极跟随器电路的电流，调节流入混频器的电流量。 当流入混频器的本地信号的电流量增加时，预期噪声抑制的影响。 流过射极跟随器电路的电流量根据可变放大器的放大系数而改变。