发明名称 |
Quadrature phase detector |
摘要 |
A quadrature phase detector includes a first load and a current source circuit. A first differential circuit and a second differential circuit coupled to the first load. In response to a first input signal, a first switching circuit couples the current source to the first differential circuit to form a first differential amplifier. The first switching circuit also couples the current source to the second differential circuit to form a second differential amplifier. The second differential amplifier is cross-coupled to the first differential amplifier. The first and second differential amplifiers are coupled to receive a differential second input signal, wherein the first and second input signals have a substantially different signal swing. A second switching circuit couples the current source to a second load in response to the complement of the first input signal. The cross-coupled first and second differential amplifiers provide a differential output signal corresponding to a quadrature phase error between the first and differential second input signals.
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申请公布号 |
US5825209(A) |
申请公布日期 |
1998.10.20 |
申请号 |
US19970807642 |
申请日期 |
1997.02.27 |
申请人 |
RAMBUS INC. |
发明人 |
STARK, DONALD C.;RICHARDSON, WAYNE S. |
分类号 |
H03L7/085;(IPC1-7):H03K5/26 |
主分类号 |
H03L7/085 |
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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