发明名称 |
PRE-RECORDED SIGMA DELTA VALUES FOR POWER AMPLIFIER CONTROL |
摘要 |
In order to increase the resolution of signals input to a power amplifier, this system includes a power control circuit which utilizes sigma delta modulated values which are stored in a memory device. These values, after retrieval from an addressable memory, are supplied only to a low pass filter before being sent to the control input of the power amplifier. The use of sigma delta modulated values can result in a reduction of hardware within the power control circuit of communication devices and increase the signal resolution by moving noise elements from the signal.
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申请公布号 |
WO9963660(A1) |
申请公布日期 |
1999.12.09 |
申请号 |
WO1999SE00906 |
申请日期 |
1999.05.27 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) |
发明人 |
KHULLAR, ANDERS;GRAHM, TORBJOERN;GAERDENFORS, TORBJOERN;SEDVALLSON, SEBASTIAN |
分类号 |
H03G3/30;H03M3/02;H03M7/00;(IPC1-7):H03G3/30 |
主分类号 |
H03G3/30 |
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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