公开(公告)号：US20050093639A1

公开(公告)日：2005-05-05

申请号：US10952447

申请日：2004-09-29

Applicant: Gojin Arakawa

Inventor： Gojin Arakawa

IPC: H03K3/00 ,  H03B1/00 ,  H03B5/02 ,  H03B5/12 ,  H03B5/18 ,  H03K17/62

CPC classification number: H03B25/00 ,  H03B2200/0048 ,  H03B2201/0266

Abstract: A voltage controlled oscillator and a switching circuit therein are capable of surely disabling the unselected circuit. In the case where a switching voltage is low, a first PNP transistor is turned on, and a voltage is applied to a first circuit connecting to the collector of the first PNP transistor. A second PNP transistor is then turned off, and no voltage is applied to a second circuit connecting the collector of the second PNP transistor. In contrast, in the case where the switching voltage is high, the first PNP transistor is turned off, and voltage is not applied to the first circuit. The second PNP transistor is turned on, and a voltage is applied to the second circuit.

Abstract translation: 其中的压控振荡器和开关电路能够确定地禁用未选择的电路。 在开关电压低的情况下，第一PNP晶体管导通，并且向连接到第一PNP晶体管的集电极的第一电路施加电压。 然后关闭第二PNP晶体管，并且没有电压施加到连接第二PNP晶体管的集电极的第二电路。 相反，在开关电压高的情况下，第一PNP晶体管截止，并且不向第一电路施加电压。 第二PNP晶体管导通，并且向第二电路施加电压。