发明名称 |
Mixed signal processing system and method for powering same. |
摘要 |
<p>A mixed signal processing system (22) includes digital (28) and analog (29) systems and is powered by a variable external voltage, such as a battery voltage. A voltage regulator (41) regulates the battery voltage to a nominal potential less than the battery voltage. The voltage regulator (41) provides the regulated voltage to a digital subsystem (51) of the digital system (28). A regulated charge pump (43) provides a voltage which is above the battery voltage and substantially constant due to regulation. The regulated charge pump (43) provides the regulated charge-pumped voltage to an analog subsystem (61) of the analog system (29) for better analog operation. A level shifter (44) equalizes signal levels between the digital (28) and analog (29) systems. <IMAGE></p> |
申请公布号 |
EP0540947(A2) |
申请公布日期 |
1993.05.12 |
申请号 |
EP19920118083 |
申请日期 |
1992.10.22 |
申请人 |
MOTOROLA, INC. |
发明人 |
BONET, LUIS AUGUSTO;WESTWICK, ALAN LEE;ZAVALETA, MAURICIO ARTURO;TUVELL, JAMES ALAN;BUSH, DAVID E.;FLOYD, MICHAEL DALE |
分类号 |
H03M1/00;G05F1/62;H02M3/07;H04B7/26;H04M1/00;H04M1/73;(IPC1-7):H02M3/07 |
主分类号 |
H03M1/00 |
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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