发明名称 |
Low-noise voltage controlled oscillator |
摘要 |
A low-noise voltage controlled oscillator is provided, to improve a phase noise characteristic and widen a frequency variable range. The low-noise voltage controlled oscillator is configured so that an oscillation element and a capacitor 2 are connected in series between a collector C and an emitter E of a transistor 1, capacitors 3 and 4 are connected in series between the collector C and the emitter E, an electrical potential between the capacitors 3 and 4 is applied to a base B of the transistor 1; a one-port circuit 6 is provided between the collector C and the capacitor 4; and a capacitor for correction 5 is connected in parallel with the capacitors 3 and 4. The one-port circuit 6 includes a tuned circuit provided with a variable capacitor adjusting a capacity thereof smaller and an inductor adjusting a value of inductance larger so as to set a value of impedance relatively large.
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申请公布号 |
US8111110(B2) |
申请公布日期 |
2012.02.07 |
申请号 |
US20090585685 |
申请日期 |
2009.09.22 |
申请人 |
YAMAKAWA JUNICHIRO;AKAIKE KAZUO;NAKAOKA TAKASHI;TAKANO MIKIO;ARAI YUICHIRO;NIHON DEMPA KOGYO CO., LTD |
发明人 |
YAMAKAWA JUNICHIRO;AKAIKE KAZUO;NAKAOKA TAKASHI;TAKANO MIKIO;ARAI YUICHIRO |
分类号 |
H03B5/08 |
主分类号 |
H03B5/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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