发明名称 |
Direct synthesis transmitter |
摘要 |
A direct synthesis transmitter. A very efficient and highly linear direct synthesis transmitter is provided that can be used to directly synthesize and transmit any type of modulated signal. The direct synthesis transmitter includes a phase-locked loop (PLL) with controls phase modulation plus an accompanying variable gain amplifier for amplitude modulation. Also included is a system to align the phase and amplitude modulation signals. A transmitter constructed in accordance with the present invention is very efficient and suitable for use in portable radio equipment. |
申请公布号 |
US2003078016(A1) |
申请公布日期 |
2003.04.24 |
申请号 |
US20020265215 |
申请日期 |
2002.10.04 |
申请人 |
GROE JOHN B.;AUSTIN JOSEPH;FARIAS NAONE;LO CARRIE |
发明人 |
GROE JOHN B.;AUSTIN JOSEPH;FARIAS NAONE;LO CARRIE |
分类号 |
H03B5/12;H04B1/04;(IPC1-7):H04B1/02;H01Q11/12 |
主分类号 |
H03B5/12 |
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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