发明名称 |
Wireless communication system and communication semiconductor integrated circuit device |
摘要 |
When a transmitting oscillator is built in a communication semiconductor integrated circuit device like a high-frequency IC constituting a wireless communication system, the system prevents degradation of the accuracy of control on the output power of a power amplifier due to noise jumped from an output pin of the transmitting oscillator to an input pin for a detected signal (feedback signal) of an output level of the power amplifier. The transmitting oscillator is built in the high-frequency IC. The detected signal of the output level of the power amplifier, which is detected by a coupler, is attenuated to a level slightly higher than the level of noise jumped from the output pin of the transmitting oscillator to the input pin for a feedback signal of an amplitude control loop, which in turn is inputted to the feedback signal input pin of the high-frequency IC.
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申请公布号 |
US7356092(B2) |
申请公布日期 |
2008.04.08 |
申请号 |
US20040808318 |
申请日期 |
2004.03.25 |
申请人 |
RENESAS TECHNOLOGY CORPORATION |
发明人 |
TAKANO RYOICHI;HIKASA KAZUHIKO;TOYOTA KENJI;OKADA KAZUHISA |
分类号 |
H03F3/45;H04L27/36;H03B5/12;H03G3/30;H03J7/02;H04B1/04 |
主分类号 |
H03F3/45 |
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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