发明名称 |
Communication semiconductor integrated circuit, communication electronic component and wireless communication system |
摘要 |
A communication semiconductor integrated circuit includes a phase control loop and an amplitude control loop. A gain of a variable gain amplifier when it is detected from an output of the comparator that the amplitudes of the reference signal and the feedback signal are equal to each other while a predetermined DC voltage is applied to an amplifier which amplifies an output of a transmission oscillation circuit and is controlled by the amplitude control loop to vary the gain of the variable gain amplifier on a feedback path is held in a register. Thereafter, the DC voltage is changed to another value to detect the gain of the variable gain amplifier, so that the gain of a variable gain amplifier on the forward path is decided on the basis of the detected gain and the gain held in the register. |
申请公布号 |
US8095094(B2) |
申请公布日期 |
2012.01.10 |
申请号 |
US20080263571 |
申请日期 |
2008.11.03 |
申请人 |
MATSUI HIROAKI;YAMAWAKI TAIZO;HARASAWA YOSHIAKI;WILLIAMS STEVE;RENESAS ELECTRONICS CORPORATION;TTPCOM LIMITED |
发明人 |
MATSUI HIROAKI;YAMAWAKI TAIZO;HARASAWA YOSHIAKI;WILLIAMS STEVE |
分类号 |
H01Q11/12;H03F3/21;H03F3/45;H03G3/30;H04B1/04 |
主分类号 |
H01Q11/12 |
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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