知搜-全球专利检索

  1. 登录
  2. 注册
发明授权
US07701304B2 Voltage controlled oscillator, and PLL circuit and radio communication apparatus using the same 有权
压控振荡器，PLL电路及使用其的无线通信装置

Voltage controlled oscillator, and PLL circuit and radio communication apparatus using the same
摘要：
A voltage controlled oscillator has a reference voltage generation section for generating a plurality of reference voltage based on a power supply voltage. Reference voltages Vref1, Vref2, and Vref3 are inputted to variable capacitance circuits A, B, and C, respectively. Reference voltages Vref1, Vref2, and Vref3 each has a fixed value, and a difference between the first reference voltage Vref1 and the second reference voltage Vref2 and a difference between the second reference voltage Vref2 and the third reference voltage Vref3 represent values different from each other. A control voltage Vt for feedback-controlling an oscillation frequency is inputted to each of the other of the terminals of the variable capacitance element of each of the n variable capacitance circuits such that the control voltage Vt having the same value is inputted to the each of the other of the terminals.
摘要（中）：

压控振荡器具有用于基于电源电压产生多个参考电压的参考电压产生部分。 参考电压Vref1，Vref2和Vref3分别输入到可变电容电路A，B和C. 参考电压Vref1，Vref2和Vref3各自具有固定值，并且第一参考电压Vref1和第二参考电压Vref2之间的差以及第二参考电压Vref2与第三参考电压Vref3之间的差表示彼此不同的值 。 将用于反馈控制振荡频率的控制电压Vt输入到n个可变电容电路中的每一个的可变电容元件的另一个端子中，使得具有相同值的控制电压Vt被输入到 另一个终端。

公开/授权文献
信息查询
Espacenet
0/0