发明名称 |
Active quadrature signal generator using load having low-pass and high-pass filter characteristics |
摘要 |
An active quadrature signal generator produces poly-phase quadrature signals necessary in high frequency transmit and receive elements of a communication system. The quadrature signals are produced using the phase difference between a load representing a low-pass filter characteristic and a load representing a high-pass filter characteristic and the quadrature signal is then used in the differential structure to produce amplified signal having 4 quadrature phases. The device can reduce a loss characteristic of the signal and additional power consumption for compensating for it in a common poly-phase quadrature filter having only conventional resistors and capacitor. |
申请公布号 |
US6831497(B2) |
申请公布日期 |
2004.12.14 |
申请号 |
US20020179491 |
申请日期 |
2002.06.24 |
申请人 |
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE |
发明人 |
KOH KWANG JIN;YU HYUN KYU |
分类号 |
H04L27/18;H03B1/00;H03B5/12;H03B27/00;(IPC1-7):H03H11/16 |
主分类号 |
H04L27/18 |
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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