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1. 发明申请

US20120161868A1 SEMICONDUCTOR DEVICE 有权
标题翻译：半导体器件
公开(公告)号：US20120161868A1
公开(公告)日：2012-06-28
申请号：US13333448
申请日：2011-12-21
申请人： Kosuke YAYAMA , Takashi Nakamura
发明人： Kosuke YAYAMA , Takashi Nakamura
IPC分类号： H03F3/45
CPC分类号： H03L7/00 , H03K3/0231 , H03L1/00 , H03L1/022
摘要： A clock signal capable of changing the frequency in a wide range and with high resolution is generated.An operational amplifier AMP1 is subject to feedback control so that the voltage of a positive input part equals that of a negative input part. The voltage of a circuit node fbck equals a reference voltage VREFI. A decoder DEC decodes control signals CNT7 and CNT6 and turns on one of transistors T2 to T5. This configuration provides feedback control so that the voltage of the circuit node fbck equals the reference voltage VREFI. This significantly reduces the on-resistances of the transistors T2 to T5 and prevents the degradation of the frequency accuracy.
摘要翻译：产生能够在宽范围内以高分辨率改变频率的时钟信号。运算放大器AMP1经受反馈控制，使得正输入部分的电压等于负输入部分的电压。电路节点fbck的电压等于参考电压VREFI。解码器DEC解码控制信号CNT7和CNT6，并导通晶体管T2至T5中的一个。该配置提供反馈控制，使得电路节点fbck的电压等于参考电压VREFI。这显着地降低了晶体管T2至T5的导通电阻并防止了频率精度的降低。

2. 发明申请

US20120074986A1 SEMICONDUCTOR DEVICE 有权
标题翻译：半导体器件
公开(公告)号：US20120074986A1
公开(公告)日：2012-03-29
申请号：US13011948
申请日：2011-01-24
申请人： Takashi NAKAMURA , Kosuke YAYAMA
发明人： Takashi NAKAMURA , Kosuke YAYAMA
IPC分类号： G05F5/00
CPC分类号： H03L7/107 , G05F1/561 , H03J2200/10 , H03K4/501
摘要： A high-accuracy clock signal is generated even when the settings of the clock frequency are changed or there is a variation in power supply, temperature, or the like. A frequency-voltage conversion circuit includes a switch portion including switches, electrostatic capacitive elements, and other switches. The electrostatic capacitive elements have different absolute capacitance values, and are provided so as to cover a frequency range intended by a designer. For example, based on 4-bit frequency adjustment control signals, the other switches select the electrostatic capacitive elements having the electrostatic capacitance values thereof each weighted with 2 to perform the switching of a frequency.
摘要翻译：即使当时钟频率的设置改变或电源，温度等的变化时，也产生高精度的时钟信号。频率电压转换电路包括开关部分，其包括开关，静电电容元件和其它开关。静电电容元件具有不同的绝对电容值，并且被设置为覆盖设计者所期望的频率范围。例如，基于4位频率调整控制信号，其他开关选择具有2的静电电容值的静电电容元件，以2进行加权，以进行频率切换。

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