公开(公告)号：EP1958321A2

公开(公告)日：2008-08-20

申请号：EP06831946.6

申请日：2006-11-27

申请人： NXP B.V.

发明人： BOUHAMAME, Mohamed ,  TOURRET, Jean-Robert ,  LOCOCO, Luca

IPC分类号： H02M3/07

CPC分类号： H02M3/073 ,  H02M1/32

摘要： A charge pump circuit for increasing a circuit voltage, comprising: a DC-DC up-converter (14) having an array of capacitors arranged to charge-pump to a higher voltage than the circuit voltage, the DC-DC up-converter having an output lead (8) arranged to output the higher voltage, a DC-DC down-converter (30) connected to the output lead, the DC-DC down-converter having an array of capacitors and diodes arranged to down-pump the higher voltage, and an ESP (Electrostatic Discharge Protection) circuit comprising a series (42) of N series-connected diodes arranged to sink current from the output lead, wherein N is an integer larger than two, each diode having its anode permanently connected to the output lead and its cathode permanently connected to a reference potential, wherein the series includes the diodes of the DC-DC down-converter.

公开(公告)号：EP2195926A2

公开(公告)日：2010-06-16

申请号：EP08807652.6

申请日：2008-09-15

申请人： NXP B.V.

发明人： BOUHAMAME, Mohamed ,  LOCOCO, Luca ,  ROBERT, Sebastien

IPC分类号： H03H11/12 ,  H03F1/34 ,  H03F3/50 ,  H03F3/195

CPC分类号： H03F3/50 ,  H03F1/26 ,  H03F1/32 ,  H03F1/34 ,  H03F1/56 ,  H03F3/195 ,  H03F3/45475 ,  H03F2200/144 ,  H03F2200/213 ,  H03F2200/378 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2200/435 ,  H03F2200/451 ,  H03F2203/45136 ,  H03F2203/45522 ,  H03F2203/5006 ,  H03F2203/5021 ,  H03F2203/5024 ,  H03F2203/5031 ,  H03F2203/5036 ,  H03F2203/5039 ,  H03G5/14 ,  H03H11/1213 ,  H03H11/1291

摘要： A tunable RF filter, comprising: an emitter follower stage (2); and a common emitter stage (4); the common emitter stage (4) providing feedback to the emitter follower stage (2). The common emitter stage (4) may comprise a first transistor (Ti) being the only transistor of the common emitter stage (4); and the emitter follower stage (2) may comprise a second transistor (T2) being the only transistor of the emitter follower stage (2). A further tunable RF filter provides improved linearity, comprising: an emitter follower stage (22); a joint common emitter and emitter follower stage (24); and a gain stage (26); a common emitter output of the joint common emitter and emitter follower stage (24) providing feedback to the emitter follower stage (22), and an emitter follower output of the joint common emitter and emitter follower stage (24) providing an input to the gain stage (26).