发明名称 |
Communication semiconductor integrated circuit device |
摘要 |
The invention provides a communication semiconductor integrated circuit (RF IC) that, when a transmission oscillator is incorporated into a semiconductor chip, secures the oscillation operation over a wide frequency range, prevents a deterioration of a transmission spectrum, and thereby enhances the accuracy of an oscillation frequency. The integrated circuit corrects a dispersion of the KV characteristic of the transmission oscillator by calibrating a current Icp of the charge pump inside the phase control loop. More in concrete, the integrated circuit measures a KV value Kv of the transmission oscillator, and calibrates the current Icp of the charge pump so that Kv.Icp falls into a predetermined value. |
申请公布号 |
US2005059372(A1) |
申请公布日期 |
2005.03.17 |
申请号 |
US20040862626 |
申请日期 |
2004.06.08 |
申请人 |
ARAYASHIKI SATOSHI;OOSAWA HIROTAKA;KURAKAMI NORIYUKI;OKASAKA AKIRA;KIMURA YASUYUKI;UOZUMI TOSHIYA;MIYAGAWA HIROKAZU;TANAKA SATOSHI |
发明人 |
ARAYASHIKI SATOSHI;OOSAWA HIROTAKA;KURAKAMI NORIYUKI;OKASAKA AKIRA;KIMURA YASUYUKI;UOZUMI TOSHIYA;MIYAGAWA HIROKAZU;TANAKA SATOSHI |
分类号 |
H03B5/12;H03L7/089;H03L7/093;H03L7/099;H03L7/10;H03L7/16;H04B1/04;H04B1/40;(IPC1-7):H04B1/02;H03C7/02;H04B7/02;H04B1/16 |
主分类号 |
H03B5/12 |
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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