发明名称 |
MONOLITHIC HIGH FREQUENCY VOLTAGE CONTROLLED OSCILLATOR TRIMMING CIRCUIT |
摘要 |
A monolithic high frequency voltage controlled oscillator trimming circuit includes a plurality of capacitance loops selectively connected between a first and second differential input of a voltage oscillator active network. A plurality of diodes, connected in series with the respective plurality of capacitance loops, selectively connect respective capacitance loops between the first and second differential input when forward biased. In a similar fashion, the plurality of diodes selectively disconnect the respective capacitance loops from the first and second differential input when reverse biased. A controller applies a forward biasing voltage to the diode of the selected capacitance loop to connect the capacitance loop to the active network of the voltage controlled oscillator and applies a reverse biasing voltage to the diode of the selected capacitance loop to disconnect the capacitance loop from the active network. The diodes used in the capacitance loops form a switch operable at high frequencies and are formed from a bipolar complementary metal oxide semiconductor electro-static discharge protection diode. |
申请公布号 |
EP1032970(B1) |
申请公布日期 |
2003.04.02 |
申请号 |
EP19980958422 |
申请日期 |
1998.11.10 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON |
发明人 |
BJOERK, CHRISTIAN;LANTZ, MARTIN;GAERDENFORS, TORBJOERN;MARHOLEV, BOJKO |
分类号 |
H03B1/00;H03B5/12;(IPC1-7):H03B5/12 |
主分类号 |
H03B1/00 |
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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