发明名称 |
PLL ARRANGEMENT, CHARGE PUMP, METHOD FOR CHARGE REGULATION AND MOBILE TRANSCEIVER |
摘要 |
A charge pump arrangement for a phase-locked-loop has a current source circuit (60) which provides charging current to the phase locked loop, and a current sink circuit (90) which depletes charging current from the phase locked loop. The current source circuit (60) and the current sink circuit (90) have slew rates which have a predetermined relationship. In this way, the charge pump causes substantially no non-linear charge injection in the phase-locked-loop. Cascoded current mirrors (75, 85) are utilised to provide a high voltage with thin gate oxide technology. The arrangement has a relatively small die size. Since bias currents of the arrangement are mirrored according to the output current required, improved transient times are produced, leading to reduced phase noise. |
申请公布号 |
WO03069781(A3) |
申请公布日期 |
2004.01.29 |
申请号 |
WO2002EP13199 |
申请日期 |
2002.11.25 |
申请人 |
MOTOROLA INC;FITZGIBBON, MORGAN;MOORE, JEREMY, W.;BUSHEY, TOM |
发明人 |
FITZGIBBON, MORGAN;MOORE, JEREMY, W.;BUSHEY, TOM |
分类号 |
H03L7/089 |
主分类号 |
H03L7/089 |
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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