发明名称 |
Circuit and method of amplifying a signal for a receiver |
摘要 |
A transceiver (10) has a transmitter (12) and an image reject receiver (16). The image reject receiver (16) provides frequency translation of two modulated signals received from an antenna (14). The image reject receiver (16) has two mixers (22 and 32) to accomplish the frequency translation. One mixer (22) receives a modulated signal for GSM operation and the other mixer (32) receives a modulated signal for DCS/PCS operation. A local oscillator (24) generates another signal having a gain controlled by an amplifier (26) for supplying differential signals to both of the mixers (22 and 32). The amplifier (26) uses transistors (46 and 58) with inductors (40, 52, and 68) to generate the differential signals.
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申请公布号 |
US6133793(A) |
申请公布日期 |
2000.10.17 |
申请号 |
US19980122730 |
申请日期 |
1998.07.27 |
申请人 |
MOTOROLA, INC. |
发明人 |
LAU, SIN KAI HENRY;SENEFF, TIMOTHY ERNEST |
分类号 |
H03F1/22;H03F3/193;(IPC1-7):H03F3/191 |
主分类号 |
H03F1/22 |
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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