发明名称 |
High Q linear controlled variable capacitor using translinear amplifier |
摘要 |
A voltage controlled variable capacitor, formed of a larger number of fixed capacitor segments and a corresponding number of switching elements, uses translinear amplifiers to control each switching element. Each translinear amplifier linearly switches from the fully off to the fully on state; a minimum number of switching stages (ideally only one) is in the mode-of-change at any one time with a minimum overlap. The arrangement achieves a nearly linear change of capacitance at linear tuning voltage change, while resulting in high Q-factor due to the low RDSon and high RDSoff of the fully switched stages. The invention eliminates temperature and voltage dependencies of other solutions like varactor diodes.
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申请公布号 |
US2005151575(A1) |
申请公布日期 |
2005.07.14 |
申请号 |
US20040764914 |
申请日期 |
2004.01.26 |
申请人 |
DIALOG SEMICONDUCTOR GMBH |
发明人 |
SIBRAI ANDREAS;NIEDERL JOSEF |
分类号 |
H03H11/12;(IPC1-7):G06F1/00 |
主分类号 |
H03H11/12 |
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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