发明名称 |
Voltage controlled oscillator in a PLL circuit |
摘要 |
<p>A voltage controlled oscillator includes N (N is an integer equal to or more than 2) inversion-type differential amplifiers (9a to 9d) and a level converter (7). The N (N is an integer equal to or more than 2) inversion-type differential amplifiers are connected in a loop such that each of output signals outputted from one of the N inversion-type differential amplifiers has an opposite polarity to a corresponding one of output signals outputted from the next one of the N inversion-type differential amplifiers. The level converter is connected to one of the N inversion-type differential amplifiers as a last inversion-type differential amplifier to generate an oscillation signal from the output signals outputted from the last inversion-type differential amplifier. Each of the N inversion-type differential amplifiers operates in response to a predetermined voltage and a control voltage. <IMAGE></p> |
申请公布号 |
EP1246356(A1) |
申请公布日期 |
2002.10.02 |
申请号 |
EP20020090120 |
申请日期 |
2002.03.22 |
申请人 |
NEC ELECTRONICS CORPORATION |
发明人 |
HASEGAWA, MASARU |
分类号 |
H03K3/0231;H03K3/011;H03K3/023;H03K3/03;H03L7/099;H03L7/18;(IPC1-7):H03B5/24 |
主分类号 |
H03K3/0231 |
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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